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general description the max220?ax249 family of line drivers/receivers is intended for all eia/tia-232e and v.28/v.24 communica- tions interfaces, particularly applications where ?2v is not available. these parts are especially useful in battery-powered sys- tems, since their low-power shutdown mode reduces power dissipation to less than 5w. the max225, max233, max235, and max245/max246/max247 use no external components and are recommended for appli- cations where printed circuit board space is critical. ________________________applications portable computers low-power modems interface translation battery-powered rs-232 systems multidrop rs-232 networks next-generation device features for low-voltage, integrated esd applications max3222e/max3232e/max3237e/max3241e/ max3246e: +3.0v to +5.5v, low-power, up to 1mbps, true rs-232 transceivers using four 0.1f external capacitors (max3246e available in a ucsp package) for low-cost applications max221e: 15kv esd-protected, +5v, 1a, single rs-232 transceiver with autoshutdown max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers ________________________________________________________________ maxim integrated products 1 selection table 19-4323; rev 14; 8/04 part max220 cpe max220cse max220cwe 0? to +70? 0? to +70? 0? to +70? temp range pin-package 16 plastic dip 16 narrow so 16 wide so max220c/d 0? to +70? dice* max220epe max220ese max220ewe -40? to +85? -40? to +85? -40? to +85? 16 plastic dip 16 narrow so 16 wide so max220eje -40? to +85? 16 cerdip max220mje -55? to +125? 16 cerdip power no. of nominal shdn rx part supply rs-232 no. of cap. value & three- active in data rate number (v) drivers/rx ext. caps (?) state shdn (kbps) features max220 +5 2/2 4 0.047/0.33 no 120 ultra-low-power, industry-standard pinout max222 +5 2/2 4 0.1 yes 200 low-power shutdown max223 (max213) +5 4/5 4 1.0 (0.1) yes ? 120 max241 and receivers active in shutdown max225 +5 5/5 0 yes ? 120 available in so max230 (max200) +5 5/0 4 1.0 (0.1) yes 120 5 drivers with shutdown max231 (max201) +5 and 2/2 2 1.0 (0.1) no 120 standard +5/+12v or battery supplies; +7.5 to +13.2 same functions as max232 max232 (max202) +5 2/2 4 1.0 (0.1) no 120 (64) industry standard max232a +5 2/2 4 0.1 no 200 higher slew rate, small caps max233 (max203) +5 2/2 0 no 120 no external caps max233a +5 2/2 0 no 200 no external caps, high slew rate max234 (max204) +5 4/0 4 1.0 (0.1) no 120 replaces 1488 max235 (max205) +5 5/5 0 yes 120 no external caps max236 (max206) +5 4/3 4 1.0 (0.1) yes 120 shutdown, three state max237 (max207) +5 5/3 4 1.0 (0.1) no 120 complements ibm pc serial port max238 (max208) +5 4/4 4 1.0 (0.1) no 120 replaces 1488 and 1489 max239 (max209) +5 and 3/5 2 1.0 (0.1) no 120 standard +5/+12v or battery supplies; +7.5 to +13.2 single-package solution for ibm pc serial port max240 +5 5/5 4 1.0 yes 120 dip or flatpack package max241 (max211) +5 4/5 4 1.0 (0.1) yes 120 complete ibm pc serial port max242 +5 2/2 4 0.1 yes ? 200 separate shutdown and enable max243 +5 2/2 4 0.1 no 200 open-line detection simplifies cabling max244 +5 8/10 4 1.0 no 120 high slew rate max245 +5 8/10 0 yes ? 120 high slew rate, int. caps, two shutdown modes max246 +5 8/10 0 yes ? 120 high slew rate, int. caps, three shutdown modes max247 +5 8/9 0 yes ? 120 high slew rate, int. caps, nine operating modes max248 +5 8/8 4 1.0 yes ? 120 high slew rate, selective half-chip enables max249 +5 6/10 4 1.0 yes ? 120 available in quad flatpack package for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. ordering information ordering information continued at end of data sheet. *contact factory for dice specifications. autoshutdown and ucsp are trademarks of maxim integrated products, inc.
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers 2 _______________________________________________________________________________________ absolute maximum ratings?ax220/222/232a/233a/242/243 electrical characteristics?ax220/222/232a/233a/242/243 (v cc = +5v ?0%, c1?4 = 0.1??max220, c1 = 0.047?, c2?4 = 0.33?, t a = t min to t max ?unless otherwise noted.) note 1: for the max220, v+ and v- can have a maximum magnitude of 7v, but their absolute difference cannot exceed 13v. note 2: input voltage measured with t out in high-impedance state, shdn or v cc = 0v. note 3: maximum reflow temperature for the max225_wi and max233a_wp is +220?. stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. supply voltage (v cc ) ...............................................-0.3v to +6v v+ (note 1) ..................................................(v cc - 0.3v) to +14v v- (note 1) .............................................................+0.3v to +14v input voltages t in ..............................................................-0.3v to (v cc - 0.3v) r in (except max220) ........................................................?0v r in (max220).....................................................................?5v t out (except max220) (note 2) .......................................?5v t out (max220)...............................................................?3.2v output voltages t out ...................................................................................?5v r out .........................................................-0.3v to (v cc + 0.3v) driver/receiver output short circuited to gnd.........continuous continuous power dissipation (t a = +70?) 16-pin plastic dip (derate 10.53mw/? above +70?)..842mw 18-pin plastic dip (derate 11.11mw/? above +70?)..889mw 20-pin plastic dip (derate 8.00mw/? above +70?) ..440mw 16-pin narrow so (derate 8.70mw/? above +70?) ...696mw 16-pin wide so (derate 9.52mw/? above +70?)......762mw 18-pin wide so (derate 9.52mw/? above +70?)......762mw 20-pin wide so (derate 10.00mw/? above +70?)....800mw 20-pin ssop (derate 8.00mw/? above +70?) ..........640mw 16-pin cerdip (derate 10.00mw/? above +70?).....800mw 18-pin cerdip (derate 10.53mw/? above +70?).....842mw operating temperature ranges max2_ _ac_ _, max2_ _c_ _ .............................0? to +70? max2_ _ae_ _, max2_ _e_ _ ..........................-40? to +85? max2_ _am_ _, max2_ _m_ _ .......................-55? to +125? storage temperature range .............................-65? to +160? lead temperature (soldering, 10s) (note 3) ...................+300? parameter conditions min typ max units rs-232 transmitters output voltage swing all transmitter outputs loaded with 3k ? to gnd 5 8 v input logic threshold low 1.4 0.8 v all devices except max220 2 1.4 input logic threshold high max220: v cc = 5.0v 2.4 v all except max220, normal operation 5 40 logic pullup/lnput current shdn = 0v, max222/max242, shutdown, max220 0.01 1 a v cc = 5.5v, shdn = 0v, v out = 15v, max222/max242 0.01 10 v out = 15v 0.01 10 output leakage current v cc = shdn = 0v max220, v out = 12v 25 a data rate 200 116 kbps transmitter output resistance v cc = v+ = v- = 0v, v out = 2v 300 10m ? v out = 0v 7 22 output short-circuit current v out = 0v max220 60 ma rs-232 receivers 30 rs-232 input voltage operating range max220 25 v all except max243 r2 in 0.8 1.3 rs-232 input threshold low v cc = 5v max243 r2 in (note 4) -3 v all except max243 r2 in 1.8 2.4 rs-232 input threshold high v cc = 5v max243 r2 in (note 4) -0.5 -0.1 v
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers _______________________________________________________________________________________ 3 note 4: max243 r2 out is guaranteed to be low when r2 in is 0v or is floating. electrical characteristics?ax220/222/232a/233a/242/243 (continued) (v cc = +5v ?0%, c1?4 = 0.1??max220, c1 = 0.047?, c2?4 = 0.33?, t a = t min to t max ?unless otherwise noted.) parameter conditions min typ max units all except max220/max243, v cc = 5v, no hysteresis in shdn 0.2 0.5 1 max220 0.3 rs-232 input hysteresis max243 1 v 35 7 rs-232 input resistance t a = +25? (max220) 35 7 k ? i out = 3.2ma 0.2 0.4 ttl/cmos output voltage low i out = 1.6ma (max220) 0.4 v ttl/cmos output voltage high i out = -1.0ma 3.5 v cc - 0.2 v sourcing v out = gnd -2 -10 ttl/cmos output short-circuit current shrinking v out = v cc 10 30 ma ttl/cmos output leakage current shdn = v cc or en = v cc ( shdn = 0v for max222), 0v v out v cc ?.05 ?0 ? en input threshold low max242 1.4 0.8 v en input threshold high max242 2.0 1.4 v operating supply voltage 4.5 5.5 v max220 0.5 2 no load max222/max232a/max233a/ max242/max243 410 max220 12 v cc supply current ( shdn = v cc ), figures 5, 6, 11, 19 3k ? load both inputs max222/max232a/max233a/ max242/max243 15 ? t a = +25? 0.1 10 t a = 0? to +70? 2 50 t a = -40? to +85? 2 50 shutdown supply current max222/ max242 t a = -55? to +125? 35 100 ? shdn input leakage current max222/max242 ? ? shdn threshold low max222/max242 1.4 0.8 v shdn threshold high max222/max242 2.0 1.4 v max222/max232a/max233/ max242/max243 61230 transition slew rate c l = 50pf to 2500pf, r l = 3k ? to 7k ? , v cc = 5v, t a = +25?, measured from +3v to -3v or -3v max220 1.5 330 v/? max222/max232a/max233/ max242/max243 1.3 3.5 t phlt max220 4 10 max222/max232a/max233/ max242/max243 1.5 3.5 transmitter propagation delay tll to rs-232 (normal operation), figure 1 t plht max220 5 10 ?
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers 4 _______________________________________________________________________________________ __________________________________________typical operating characteristics max220/max222/max232a/max233a/max242/max243 10 8 -10 0 5 15 25 output voltage vs. load current -4 -6 -8 -2 6 4 2 max220-01 load current (ma) output voltage (v) 10 0 20 0.1 f either v+ or v- loaded v cc = ?v no load on transmitter outputs (except max220, max233a) v- loaded, no load on v+ v+ loaded, no load on v- 1 f 1 f 0.1 f 11 10 4 010 40 60 available output current vs. data rate 6 5 7 9 8 max220-02 data rate (kbits/sec) output current (ma) 20 30 50 output load current flows from v+ to v- v cc = +5.25v all caps 1 f all caps 0.1 f v cc = +4.75v +10v -10v max222/max242 on-time exiting shutdown +5v +5v 0v 0v max220-03 500 s/div v+, v- voltage (v) 1 f caps v+ v+ v- v- shdn 0.1 f caps 1 f caps 0.1 f caps electrical characteristics max220/222/232a/233a/242/243 (continued) (v cc = +5v 10%, c1 c4 = 0.1f max220, c1 = 0.047f, c2 c4 = 0.33f, t a = t min to t max unless otherwise noted.) parameter conditions min typ max units max222/max232a/max233/ max242/max243 0.5 1 t phlr max220 0.6 3 max222/max232a/max233/ max242/max243 0.6 1 receiver propagation delay rs-232 to tll (normal operation), figure 2 t plhr max220 0.8 3 s t phls max242 0.5 10 receiver propagation delay rs-232 to tll (shutdown), figure 2 t phls max242 2.5 10 s receiver-output enable time, figure 3 t er max242 125 500 ns receiver-output disable time, figure 3 t dr max242 160 500 ns transmitter-output enable time ( shdn goes high), figure 4 tet max222/max242, 0.1f caps (includes charge-pump start-up) 250 s transmitter-output disable time ( shdn goes low), figure 4 tdt max222/max242, 0.1f caps 600 ns max222/max232a/max233/ max242/max243 300 transmitter + to - propagation delay difference (normal operation) tphlt - tplht max220 2000 ns max222/max232a/max233/ max242/max243 100 receiver + to - propagation delay difference (normal operation) tphlr - tplhr max220 225 ns
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers _______________________________________________________________________________________ 5 v cc ...........................................................................-0.3v to +6v v+ ................................................................(v cc - 0.3v) to +14v v- ............................................................................+0.3v to -14v input voltages t in ............................................................-0.3v to (v cc + 0.3v) r in ......................................................................................30v output voltages t out ...................................................(v+ + 0.3v) to (v- - 0.3v) r out .........................................................-0.3v to (v cc + 0.3v) short-circuit duration, t out ......................................continuous continuous power dissipation (t a = +70 c) 14-pin plastic dip (derate 10.00mw/ c above +70 c)....800mw 16-pin plastic dip (derate 10.53mw/ c above +70 c)....842mw 20-pin plastic dip (derate 11.11mw/ c above +70 c)....889mw 24-pin narrow plastic dip (derate 13.33mw/ c above +70 c) ..........1.07w 24-pin plastic dip (derate 9.09mw/ c above +70 c)......500mw 16-pin wide so (derate 9.52mw/ c above +70 c).........762mw 20-pin wide so (derate 10 00mw/ c above +70 c).......800mw 24-pin wide so (derate 11.76mw/ c above +70 c).......941mw 28-pin wide so (derate 12.50mw/ c above +70 c) .............1w 44-pin plastic fp (derate 11.11mw/ c above +70 c) .....889mw 14-pin cerdip (derate 9.09mw/ c above +70 c) ..........727mw 16-pin cerdip (derate 10.00mw/ c above +70 c) ........800mw 20-pin cerdip (derate 11.11mw/ c above +70 c) ........889mw 24-pin narrow cerdip (derate 12.50mw/ c above +70 c) ..............1w 24-pin sidebraze (derate 20.0mw/ c above +70 c)..........1.6w 28-pin ssop (derate 9.52mw/ c above +70 c).............762mw operating temperature ranges max2 _ _ c _ _......................................................0 c to +70 c max2 _ _ e _ _ ...................................................-40 c to +85 c max2 _ _ m _ _ ...............................................-55 c to +125 c storage temperature range .............................-65 c to +160 c lead temperature (soldering, 10s) .................................+300 c absolute maximum ratings max223/max230 max241 electrical characteristics max223/max230 max241 (max223/230/232/234/236/237/238/240/241, v cc = +5v 10; max233/max235, v cc = 5v 5% c1 c4 = 1.0f; max231/max239, v cc = 5v 10%; v+ = 7.5v to 13.2v; t a = t min to t max ; unless otherwise noted.) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. conditions min typ max units output voltage swing all transmitter outputs loaded with 3k ? to ground 5.0 7.3 v v cc power-supply current no load, t a = +25 c 510 ma 715 0.4 1 v+ power-supply current 1.8 5 ma 515 shutdown supply current t a = +25 c 15 50 v input logic threshold high t in 2.0 en, shdn (max223); en , shdn (max230/235/236/240/241) 2.4 logic pull-up current t in =0v 1.5 200 receiver input voltage operating range -30 30 v a a 110 v input logic threshold low t in ; en, shdn (max233); en , shdn (max230/235 241) 0.8 max231/239 max223/230/234 238/240/241 max232/233 parameter max239 max230/235/236/240/241 max231 max223
ma max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers 6 _______________________________________________________________________________________ v 0.8 1.2 parameter min typ max units conditions normal operation shdn = 5v (max223) shdn = 0v (max235/236/240/241) 1.7 2.4 rs-232 input threshold low t a = +25 c, v cc = 5v 0.6 1.5 v rs-232 input threshold high t a = +25 c, v cc = 5v shutdown (max223) shdn = 0v, en = 5v (r4 in r5 in ) 1.5 2.4 electrical characteristics max223/max230 max241 (continued) (max223/230/232/234/236/237/238/240/241, v cc = +5v 10; max233/max235, v cc = 5v 5% c1 c4 = 1.0f; max231/max239, v cc = 5v 10%; v+ = 7.5v to 13.2v; t a = t min to t max ; unless otherwise noted.) shutdown (max223) shdn = 0v, en = 5v (r4 in , r5 in ) normal operation shdn = 5v (max223) shdn = 0v (max235/236/240/241) rs-232 input hysteresis v cc = 5v, no hysteresis in shutdown 0.2 0.5 1.0 v rs-232 input resistance t a = +25 c, v cc = 5v 357 k ? ttl/cmos output voltage low i out = 1.6ma (max231/232/233, i out = 3.2ma) 0.4 v ttl/cmos output voltage high i out = -1ma 3.5 v cc - 0.4 v ttl/cmos output leakage current 0v r out v cc ; en = 0v (max223); en = v cc (max235 241 ) 0.05 10 a max223 600 ns receiver output enable time normal operation max235/236/239/240/241 400 max223 900 ns receiver output disable time normal operation max235/236/239/240/241 250 normal operation 0.5 10 s shdn = 0v (max223) 440 propagation delay rs-232 in to ttl/cmos out, c l = 150pf 640 3 5.1 30 v/s max231/max232/max233, t a = +25 c, v cc = 5v, r l = 3k ? to 7k ? , c l = 50pf to 2500pf, measured from +3v to -3v or -3v to +3v 430 transmitter output resistance v cc = v+ = v- = 0v, v out = 2v 300 ? transmitter output short-circuit current 10 ma t phls t plhs transition region slew rate max223/max230/max234 241, t a = +25 c, v cc = 5v, r l = 3k ? to 7k ? c l = 50pf to 2500pf, measured from +3v to -3v or -3v to +3v
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers _______________________________________________________________________________________ 7 8.5 6.5 4.5 5.5 transmitter output voltage (v oh ) vs. v cc 7.0 8.0 max220-04 v cc (v) v oh (v) 5.0 7.5 1 transmitter loaded 3 trans- mitters loaded 4 transmitters loaded 2 transmitters loaded t a = +25? c1?4 = 1 f transmitter loads = 3k ? || 2500pf 7.4 6.0 0 2500 transmitter output voltage (v oh ) vs. load capacitance at different data rates 6.4 6.2 7.2 7.0 max220-05 load capacitance (pf) v oh (v) 1500 1000 500 2000 6.8 6.6 160kbits/sec 80kbits/sec 20kbits/sec t a = +25 c v cc = +5v 3 transmitters loaded r l = 3k ? c1 c4 = 1 f 12.0 4.0 0 2500 transmitter slew rate vs. load capacitance 6.0 5.0 11.0 9.0 10.0 max220-06 load capacitance (pf) slew rate (v/ s) 1500 1000 500 2000 8.0 7.0 t a = +25 c v cc = +5v loaded, r l = 3k ? c1 c4 = 1 f 1 transmitter loaded 2 transmitters loaded 3 transmitters loaded 4 transmitters loaded -6.0 -9.0 4.5 5.5 transmitter output voltage (v ol ) vs. v cc -8.0 -8.5 -6.5 -7.0 max220-07 v cc (v) v ol (v) 5.0 -7.5 4 trans- mitters loaded t a = +25 c c1 c4 = 1 f transmitter loads = 3k ? || 2500pf 1 trans- mitter loaded 2 trans- mitters loaded 3 trans- mitters loaded -6.0 -7.6 0 2500 transmitter output voltage (v ol ) vs. load capacitance at different data rates -7.0 -7.2 -7.4 -6.2 -6.4 max220-08 load capacitance (pf) v ol (v) 1500 1000 500 2000 -6.6 -6.8 160kbits/sec 80kbits/sec 20kkbits/sec t a = +25 c v cc = +5v 3 transmitters loaded r l = 3k ? c1 c4 = 1 f 10 -10 0 5 10 15 20 25 30 35 40 45 50 transmitter output voltage (v+, v-) vs. load current -2 -6 -4 -8 8 6 max220-09 current (ma) v+, v- (v) 4 2 0 v+ and v- equally loaded v- loaded, no load on v+ t a = +25 c v cc = +5v c1 c4 = 1 f all transmitters unloaded v+ loaded, no load on v- __________________________________________typical operating characteristics max223/max230 max241 *shutdown polarity is reversed for non max241 parts v+, v- when exiting shutdown (1 f capacitors) max220-13 shdn* v- o v+ 500ms/div
input logic threshold low max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers 8 _______________________________________________________________________________________ absolute maximum ratings max225/max244 max249 electrical characteristics max225/max244 max249 (max225, v cc = 5.0v 5%; max244 max249, v cc = +5.0v 10%, external capacitors c1 c4 = 1f; t a = t min to t max ; unless oth- erwise noted.) note 4: input voltage measured with transmitter output in a high-impedance state, shutdown, or v cc = 0v. stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. supply voltage (v cc ) ...............................................-0.3v to +6v input voltages t in ena , enb , enr , ent , enra , enrb , enta , entb ..................................-0.3v to (v cc + 0.3v) r in .....................................................................................25v t out (note 3).....................................................................15v r out ........................................................-0.3v to (v cc + 0.3v) short circuit (one output at a time) t out to gnd ............................................................continuous r out to gnd............................................................continuous continuous power dissipation (t a = +70 c) 28-pin wide so (derate 12.50mw/ c above +70 c) .............1w 40-pin plastic dip (derate 11.11mw/ c above +70 c) ...611mw 44-pin plcc (derate 13.33mw/ c above +70 c) ...........1.07w operating temperature ranges max225c_ _, max24_c_ _ ..................................0 c to +70 c max225e_ _, max24_e_ _ ...............................-40 c to +85 c storage temperature range .............................-65 c to +160 c lead temperature (soldering,10s) ..................................+300 c v cc = 0v, v out = 15v a tables 1a 1d 0.01 25 normal operation shutdown tables 1a 1d, normal operation all transmitter outputs loaded with 3k ? to gnd ena , enb , ent , enta , entb = v cc, v out = 15v v rs-232 input hysteresis rs-232 input threshold low v v 5 7.5 output voltage swing output leakage current (shutdown) 0.01 25 ? 300 10m v cc = v+ = v- = 0v, v out = 2v (note 4) transmitter output resistance a parameter 0.05 0.10 min typ max units normal operation, outputs disabled, tables 1a 1d, 0v v out v cc , enr _ = v cc ttl/cmos output leakage current 10 30 shrinking v out = v cc ma -2 -10 sourcing v out = gnd v 3.5 v cc - 0.2 i out = -1.0ma ttl/cmos output voltage high v 0.2 0.4 i out = 3.2ma ttl/cmos output voltage low k ? 357 0.2 0.5 1.0 v cc = 5v 1.4 0.8 v ttl/cmos output short-circuit current v 1.8 2.4 0.8 1.3 v cc = 5v rs-232 input resistance v 25 rs-232 input voltage operating range ma 7 30 v out = 0v output short-circuit current kbps 120 64 data rate conditions v cc = 5v a 0.01 1 logic pull-up/lnput current 10 50 tables 1a 1d rs-232 input threshold high v 2 1.4 input logic threshold high rs-232 transmitters rs-232 receivers
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers _______________________________________________________________________________________ 9 operating supply voltage 4.75 5.25 v transmitter enable time max225 10 20 t et no load max244 max249 11 30 51030 max225 40 v cc supply current (normal operation) 3k ? loads on all outputs max244 max249 57 ma transition slew rate 825 c l = 50pf to 2500pf, r l = 3k ? to 7k ? , v cc = 5v, t a = +25 c, measured from +3v to -3v or -3v to +3v t a = t min to t max conditions 50 v/s max246 max249 (excludes charge-pump startup) shutdown supply current a 5 t phlt 1.3 3.5 s t plht 1.5 3.5 transmitter disable time, figure 4 transmitter propagation delay tll to rs-232 (normal operation), figure 1 s t dt 100 ns transmitter + to - propagation delay difference (normal operation) t phlt - t plht units min typ max 350 parameter ns receiver + to - propagation delay difference (normal operation) t phlr - t plhr 350 ns 4.5 5.5 max244 max249 max225 leakage current 1 threshold low 1.4 0.8 control input threshold high 2.4 1.4 v a t a = +25 c t phlr 0.6 1.5 t plhr 0.6 1.5 receiver propagation delay tll to rs-232 (normal operation), figure 2 s t phls 0.6 10 t plhs 3.0 10 receiver propagation delay tll to rs-232 (low-power mode), figure 2 s receiver-output enable time, figure 3 t er 100 500 ns receiver-output disable time, figure 3 t dr 100 500 ns max225/max245 max249 (includes charge-pump startup) 10 ms power supply and control logic ac characteristics note 5: the 300 ? minimum specification complies with eia/tia-232e, but the actual resistance when in shutdown mode or v cc = 0v is 10m ? as is implied by the leakage specification. electrical characteristics max225/max244 max249 (continued) (max225, v cc = 5.0v 5%; max244 max249, v cc = +5.0v 10%, external capacitors c1 c4 = 1f; t a = t min to t max ; unless oth- erwise noted.)
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers 10 ______________________________________________________________________________________ __________________________________________typical operating characteristics max225/max244 max249 18 2 012345 transmitter slew rate vs. load capacitance 8 6 4 16 max220-10 load capacitance (nf) transmitter slew rate (v/ s) 14 12 10 v cc = 5v external power supply 1 f capacitors 40kb/s data rate 8 transmitters loaded with 3k ? 10 -10 0 5 10 15 20 25 30 35 output voltage vs. load current for v+ and v- -2 -4 -6 -8 8 max220-11 load current (ma) output voltage (v) 6 4 2 0 v+ and v- loaded either v+ or v- loaded v+ and v- loaded v cc = 5v external charge pump 1 f capacitors 8 transmitters driving 5k ? and 2000pf at 20kbits/sec v- loaded v+ loaded 9.0 5.0 01 2 345 transmitter output voltage (v+, v-) vs. load capacitance at different data rates 6.0 5.5 8.5 max220-12 load capacitance (nf) v+, v (v) 8.0 7.5 7.0 6.5 v cc = 5v with all transmitters driven loaded with 5k ? 10kb/sec 20kb/sec 40kb/sec 60kb/sec 100kb/sec 200kb/sec all capacitiors 1 f
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers ______________________________________________________________________________________ 11 input output +3v v+ 0v v- 0v t plht t phlt t phlr t phls t plhr t plhs 50% v cc 50% +3v 50% input output *except for r2 on the max243 where -3v is used. 0v* 50% gnd figure 1. transmitter propagation-delay timing figure 2. receiver propagation-delay timing en r x in a) test circuit b) enable timing c) disable timing en input receiver outputs r x out r x 1k ? 0v +3v en en +0.8v +3.5v output enable time (t er ) v cc - 2v v ol + 0.5v v oh - 0.5v output disable time (t dr ) v cc - 2v +3v 0v 150pf en input v oh receiver outputs v ol 1 or 0 t x 3k ? 50pf -5v +5v output disable time (t dt ) v+ shdn +3v 0v v- 0v a) timing diagram b) test circuit figure 3. receiver-output enable and disable timing figure 4. transmitter-output disable timing
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers 12 ______________________________________________________________________________________ ent enr operation status transmitters receivers 0 0 normal operation all active all active 0 1 normal operation all active all 3-state 1 0 shutdown all 3-state all low-power receive mode 1 1 shutdown all 3-state all 3-state table 1a. max245 control pin configurations ent enr operation status transmitters receivers ta1 ta4 tb1 tb4 ra1 ra5 rb1 rb5 0 0 normal operation all active all active all active all active 0 1 normal operation all active all active ra1 ra4 3-state, ra5 active rb1 rb4 3-state, rb5 active 1 0 shutdown all 3-state all 3-state all low-power receive mode all low-power receive mode 1 1 shutdown all 3-state all 3-state ra1 ra4 3-state, ra5 low-power receive mode rb1 rb4 3-state, rb5 low-power receive mode table 1b. max245 control pin configurations table 1c. max246 control pin configurations ena enb operation status transmitters receivers ta1 ta4 tb1 tb4 ra1 ra5 rb1 rb5 0 0 normal operation all active all active all active all active 0 1 normal operation all active all 3-state all active rb1 rb4 3-state, rb5 active 1 0 shutdown all 3-state all active ra1 ra4 3-state, ra5 active all active 1 1 shutdown all 3-state all 3-state ra1 ra4 3-state, ra5 low-power receive mode rb1 rb4 3-state, ra5 low-power receive mode
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers ______________________________________________________________________________________ 13 ta1 ta4 tb1 tb4 ra1 ra4 rb1 rb4 0 0 0 0 normal operation all active all active all active all active 0 0 0 1 normal operation all active all active all active all 3-state, except rb5 stays active on max247 0 0 1 0 normal operation all active all active all 3-state all active 0 0 1 1 normal operation all active all active all 3-state all 3-state, except rb5 stays active on max247 0 1 0 0 normal operation all active all 3-state all active all active 0 1 0 1 normal operation all active all 3-state all active all 3-state, except rb5 stays active on max247 0 1 1 0 normal operation all active all 3-state all 3-state all active 0 1 1 1 normal operation all active all 3-state all 3-state all 3-state, except rb5 stays active on max247 1 0 0 0 normal operation all 3-state all active all active all active 1 0 0 1 normal operation all 3-state all active all active all 3-state, except rb5 stays active on max247 1 0 1 0 normal operation all 3-state all active all 3-state all active 1 0 1 1 normal operation all 3-state all active all 3-state all 3-state, except rb5 stays active on max247 1 1 0 0 shutdown all 3-state all 3-state low-power receive mode low-power receive mode 1 1 0 1 shutdown all 3-state all 3-state low-power receive mode all 3-state, except rb5 stays active on max247 1 1 1 0 shutdown all 3-state all 3-state all 3-state low-power receive mode 1 1 1 1 shutdown all 3-state all 3-state all 3-state all 3-state, except rb5 stays active on max247 table 1d. max247/max248/max249 control pin configurations max248 operation status enrb max247 ta1 ta4 tb1 tb4 ra1 ra4 rb1 rb5 transmitters enra entb enta max249 ta1 ta3 tb1 tb3 ra1 ra5 rb1 rb5 receivers
max220?ax249 _______________detailed description the max220 max249 contain four sections: dual charge-pump dc-dc voltage converters, rs-232 dri- vers, rs-232 receivers, and receiver and transmitter enable control inputs. dual charge-pump voltage converter the max220 max249 have two internal charge-pumps that convert +5v to 10v (unloaded) for rs-232 driver operation. the first converter uses capacitor c1 to dou- ble the +5v input to +10v on c3 at the v+ output. the second converter uses capacitor c2 to invert +10v to -10v on c4 at the v- output. a small amount of power may be drawn from the +10v (v+) and -10v (v-) outputs to power external circuitry (see the typical operating characteristics section), except on the max225 and max245 max247, where these pins are not available. v+ and v- are not regulated, so the output voltage drops with increasing load current. do not load v+ and v- to a point that violates the mini- mum 5v eia/tia-232e driver output voltage when sourcing current from v+ and v- to external circuitry. when using the shutdown feature in the max222, max225, max230, max235, max236, max240, max241, and max245 max249, avoid using v+ and v- to power external circuitry. when these parts are shut down, v- falls to 0v, and v+ falls to +5v. for applica- tions where a +10v external supply is applied to the v+ pin (instead of using the internal charge pump to gen- erate +10v), the c1 capacitor must not be installed and the shdn pin must be tied to v cc . this is because v+ is internally connected to v cc in shutdown mode. rs-232 drivers the typical driver output voltage swing is 8v when loaded with a nominal 5k ? rs-232 receiver and v cc = +5v. output swing is guaranteed to meet the eia/tia- 232e and v.28 specification, which calls for 5v mini- mum driver output levels under worst-case conditions. these include a minimum 3k ? load, v cc = +4.5v, and maximum operating temperature. unloaded driver out- put voltage ranges from (v+ -1.3v) to (v- +0.5v). input thresholds are both ttl and cmos compatible. the inputs of unused drivers can be left unconnected since 400k ? input pull-up resistors to v cc are built in (except for the max220). the pull-up resistors force the outputs of unused drivers low because all drivers invert. the internal input pull-up resistors typically source 12a, except in shutdown mode where the pull-ups are dis- abled. driver outputs turn off and enter a high-imped- ance state where leakage current is typically microamperes (maximum 25a) when in shutdown mode, in three-state mode, or when device power is removed. outputs can be driven to 15v. the power- supply current typically drops to 8a in shutdown mode. the max220 does not have pull-up resistors to force the outputs of the unused drivers low. connect unused inputs to gnd or v cc . the max239 has a receiver three-state control line, and the max223, max225, max235, max236, max240, and max241 have both a receiver three-state control line and a low-power shutdown control. table 2 shows the effects of the shutdown control and receiver three- state control on the receiver outputs. the receiver ttl/cmos outputs are in a high-imped- ance, three-state mode whenever the three-state enable line is high (for the max225/max235/max236/max239 max241), and are also high-impedance whenever the shutdown control line is high. when in low-power shutdown mode, the driver outputs are turned off and their leakage current is less than 1a with the driver output pulled to ground. the driver output leakage remains less than 1a, even if the transmitter output is backdriven between 0v and (v cc + 6v). below -0.5v, the transmitter is diode clamped to ground with 1k ? series impedance. the transmitter is also zener clamped to approximately v cc + 6v, with a series impedance of 1k ? . the driver output slew rate is limited to less than 30v/s as required by the eia/tia-232e and v.28 specifica- tions. typical slew rates are 24v/s unloaded and 10v/s loaded with 3 ? and 2500pf. rs-232 receivers eia/tia-232e and v.28 specifications define a voltage level greater than 3v as a logic 0, so all receivers invert. input thresholds are set at 0.8v and 2.4v, so receivers respond to ttl level inputs as well as eia/tia-232e and v.28 levels. the receiver inputs withstand an input overvoltage up to 25v and provide input terminating resistors with +5v-powered, multichannel rs-232 drivers/receivers 14 ______________________________________________________________________________________ part shdn en en(r) receivers max223 __ low high high x low high high impedance active high impedance max225 __ __ high impedance active __ max235 max236 max240 low low high __ __ low high x high impedance active high impedance table 2. three-state control of receivers low high shdn __
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers ______________________________________________________________________________________ 15 nominal 5k ? values. the receivers implement type 1 interpretation of the fault conditions of v.28 and eia/tia-232e. the receiver input hysteresis is typically 0.5v with a guaranteed minimum of 0.2v. this produces clear out- put transitions with slow-moving input signals, even with moderate amounts of noise and ringing. the receiver propagation delay is typically 600ns and is independent of input swing direction. low-power receive mode the low-power receive-mode feature of the max223, max242, and max245 max249 puts the ic into shut- down mode but still allows it to receive information. this is important for applications where systems are periodi- cally awakened to look for activity. using low-power receive mode, the system can still receive a signal that will activate it on command and prepare it for communi- cation at faster data rates. this operation conserves system power. negative threshold?ax243 the max243 is pin compatible with the max232a, differ- ing only in that rs-232 cable fault protection is removed on one of the two receiver inputs. this means that control lines such as cts and rts can either be driven or left floating without interrupting communication. different cables are not needed to interface with different pieces of equipment. the input threshold of the receiver without cable fault protection is -0.8v rather than +1.4v. its output goes positive only if the input is connected to a control line that is actively driven negative. if not driven, it defaults to the 0 or ok to send state. normally the max243 s other receiver (+1.4v threshold) is used for the data line (td or rd) while the negative threshold receiver is con- nected to the control line (dtr dts cts rts, etc.). other members of the rs-232 family implement the optional cable fault protection as specified by eia/tia- 232e specifications. this means a receiver output goes high whenever its input is driven negative left floating or shorted to ground. the high output tells the serial communications ic to stop sending data. to avoid this the control lines must either be driven or connected with jumpers to an appropriate positive voltage level. shutdown?ax222?ax242 on the max222 max235 max236 max240 and max241 all receivers are disabled during shutdown. on the max223 and max242 two receivers continue to operate in a reduced power mode when the chip is in shutdown. under these conditions the propagation delay increases to about 2.5s for a high-to-low input transition. when in shutdown, the receiver acts as a cmos inverter with no hysteresis. the max223 and max242 also have a receiver output enable input ( en for the max242 and en for the max223) that allows receiver output control independent of shdn (shdn for max241). with all other devices shdn (shdn for max241) also disables the receiver outputs. the max225 provides five transmitters and five receivers while the max245 provides ten receivers and eight transmitters. both devices have separate receiver and transmitter-enable controls. the charge pumps turn off and the devices shut down when a logic high is applied to the ent input. in this state, the supply cur- rent drops to less than 25a and the receivers continue to operate in a low-power receive mode. driver outputs enter a high-impedance state (three-state mode). on the max225 all five receivers are controlled by the enr input. on the max245 eight of the receiver out- puts are controlled by the enr input while the remain- ing two receivers (ra5 and rb5) are always active. ra1 ra4 and rb1 rb4 are put in a three-state mode when enr is a logic high. receiver and transmitter enable control inputs the max225 and max245 max249 feature transmitter and receiver enable controls. the receivers have three modes of operation: full-speed receive (normal active) three-state (disabled) and low- power receive (enabled receivers continue to function at lower data rates). the receiver enable inputs control the full-speed receive and three-state modes. the transmitters have two modes of operation: full-speed transmit (normal active) and three-state (disabled). the transmitter enable inputs also control the shutdown mode. the device enters shutdown mode when all transmitters are disabled. enabled receivers function in the low-power receive mode when in shutdown.
max220?ax249 tables 1a 1d define the control states. the max244 has no control pins and is not included in these tables. the max246 has ten receivers and eight drivers with two control pins, each controlling one side of the device. a logic high at the a-side control input ( ena ) causes the four a-side receivers and drivers to go into a three-state mode. similarly, the b-side control input ( enb ) causes the four b-side drivers and receivers to go into a three-state mode. as in the max245, one a- side and one b-side receiver (ra5 and rb5) remain active at all times. the entire device is put into shut- down mode when both the a and b sides are disabled ( ena = enb = +5v). the max247 provides nine receivers and eight drivers with four control pins. the enra and enrb receiver enable inputs each control four receiver outputs. the enta and entb transmitter enable inputs each control four drivers. the ninth receiver (rb5) is always active. the device enters shutdown mode with a logic high on both enta and entb . the max248 provides eight receivers and eight drivers with four control pins. the enra and enrb receiver enable inputs each control four receiver outputs. the enta and entb transmitter enable inputs control four drivers each. this part does not have an always-active receiver. the device enters shutdown mode and trans- mitters go into a three-state mode with a logic high on both enta and entb . the max249 provides ten receivers and six drivers with four control pins. the enra and enrb receiver enable inputs each control five receiver outputs. the enta and entb transmitter enable inputs control three dri- vers each. there is no always-active receiver. the device enters shutdown mode and transmitters go into a three-state mode with a logic high on both enta and entb . in shutdown mode, active receivers operate in a low-power receive mode at data rates up to 20kb/s. __________applications information figures 5 through 25 show pin configurations and typi- cal operating circuits. in applications that are sensitive to power-supply noise, v cc should be decoupled to ground with a capacitor of the same value as c1 and c2 connected as close as possible to the device. +5v-powered, multichannel rs-232 drivers/receivers 16 ______________________________________________________________________________________
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers ______________________________________________________________________________________ 17 top view 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 v cc gnd t1 out r1 in c2+ c1- v+ c1+ max220 max232 max232a r1 out t1 in t2 in r2 out r2 in t2 out v- c2- dip/so v+ v- 2 +10v c1+ c1 c2 1 3 4 5 11 10 12 9 6 14 7 13 8 t1 in r1 out t2 in r2 out t1 out r1 i n t2 out r2 in +5v input c2+ -10v c4 rs-232 outputs rs-232 inputs ttl/cmos inputs ttl/cmos outputs gnd 15 5k ? 5k ? 400k ? 400k ? +5v +5v +10v to -10v voltage inverter +5v to +10v voltage doubler 16 c3 c5 capacitance ( f) device max220 max232 max232a c1 0.047 1.0 0.1 c2 0.33 1.0 0.1 c3 0.33 1.0 0.1 c4 0.33 1.0 0.1 c5 0.33 1.0 0.1 c2- c1- v cc 5k ? dip/so 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 shdn v cc gnd t1 out c1- v+ c1+ (n.c.) en r1 in r1 out t1 in t2 in t2 out v- c2- c2+ 10 9 r2 out r2 in max222 max242 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 shdn v cc gnd t1 out c1- v+ c1+ (n.c.) en n.c. r1 in r1 out n.c. t2 out v- c2- c2+ 12 11 9 10 t1 in t2 in r2 out r2 in max222 max242 ssop ( ) are for max222 only. pin numbers in typical operating circuit are for dip/so packages only. v+ v- 3 +10v c1 c2 2 4 5 6 12 11 13 7 15 8 14 9 t1 in r1 out t2 in r2 out t1 out (except max220) (except max220) r1 in t2 out r2 in +5v input c2+ -10v c4 rs-232 outputs rs-232 inputs ttl/cmos inputs ttl/cmos outputs gnd 16 5k ? 400k ? 400k ? +5v +5v +10v to -10v voltage inverter v cc +5v to +10v voltage doubler 17 c3 c5 1 10 18 shdn en (n.c.) all capacitors = 0.1 f c2- c1+ c1- top view figure 5. max220/max232/max232a pin configuration and typical operating circuit figure 6. max222/max242 pin configurations and typical operating circuit
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers 18 ______________________________________________________________________________________ 13 14 28 27 26 25 24 23 22 21 1 2 3 4 5 6 7 8 v cc v cc v cc 400k ? 400k ? 400k ? 400k ? 400k ? t 1 out +5v +5v 0.1 +5v 3 28 27 4 25 24 23 26 5 6 7 22 gnd enr enr gnd 21 +5v +5v +5v t 2 out t 3 out t 4 out 5k ? 5k ? 5k ? 5k ? 5k ? 14 13 2 1 t 5 out t 5 out r 1 in r 2 in r 3 in r 4 in r 5 in t 1 in 11 12 18 17 16 15 10 9 8 19 20 t 2 in t 3 in t 4 in t 5 in ent r 2 out r 3 out r 4 out pins (enr, gnd, v cc , t 5 out) are internally connected. connect either or both externally. t 5 out is a single driver. r 5 out r 1 out v cc ent t 3 in t 2 in t 1 in enr enr t 4 in t 5 in r 4 out r 5 out r 3 in r 3 out r 2 out r 1 out 20 19 18 17 9 10 11 12 r 5 in r 4 in t 3 out t 4 out t 2 out t 1 out r 1 in r 2 in so max225 16 15 t 5 out max225 functional description 5 receivers 5 transmitters 2 control pins 1 receiver enable (enr) 1 transmitter enable (ent) t 5 out gnd gnd top view figure 7. max225 pin configuration and typical operating circuit
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers ______________________________________________________________________________________ 19 gnd 10 27 r3 out 23 r4 out r3 in r4 in 5k ? 5k ? 5 4 r2 out r2 in 5k ? rs-232 inputs logic outputs rs-232 outputs ttl/cmos inputs r2 8 9 r1 out r1 in 5k ? r1 r3 r4 19 18 r5 out r5 in 5k ? r5 2 7 t1 in t1 out +5v 400k ? +5v 6 3 t2 in t2 out t2 400k ? 20 t3 out 1 t3 in +5v t3 400k ? c1+ c1- 1.0 f 12 v cc +5v input 11 17 1.0 f 13 1.0 f +5v to +10v voltage doubler 26 1.0 f t1 28 21 t4 in t4 out +5v 400k ? t4 14 c2+ c2- 15 1.0 f 16 +10v to -10v voltage inverter v+ 22 en (en) 24 25 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 t4 out r3 in r3 out shdn (shdn) r4 in* c2+ r4 out* t4 in t3 in r5 out* r5 in* v- c2- c1- v+ c1+ v cc gnd r1 in r1 out t1 in t2 in r2 out r2 in t2 out t1 out t3 out wide so/ ssop max223 max241 en (en) shdn (shdn) *r4 and r5 in max223 remain active in shutdown note: pin labels in ( ) are for max241 v- top view figure 8. max223/max241 pin configuration and typical operating circuit
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers 20 ______________________________________________________________________________________ 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 t5 in n.c. shdn t2 in t2 out t1 out t5 out t4 in t3 in v- c1+ v cc gnd t1 in 12 11 9 10 c2- c2+ c1- v+ dip/so max230 v+ v- 9 c1+ c1- 8 10 11 12 5 4 14 13 2 3 1 20 t3 in t4 in t2 in t5 in t1 out t2 out +5v input c2+ c2- rs-232 outputs ttl/cmos inputs gnd 6 400k ? +5v 400k ? +5v 400k ? +5v 400k ? +5v 400k ? +5v +10v to -10v voltage inverter v cc +5v to +10v voltage doubler 7 1.0 f 1.0 f 1.0 f 1.0 f 19 15 16 t3 out t4 out 18 x t1 in t3 out t4 out t5 out 17 1.0 f t2 t3 t4 t5 n.c. shdn t1 top view figure 9. max230 pin configuration and typical operating circuit v+ v- 14 c1+ c1- 1 2 8 7 3 11 4 t2 in t1 in t1 out t2 out +5v input rs-232 inputs ttl/cmos outputs gnd 12 (14) 5k ? 5k ? +12v to -12v voltage converter 13 (15) 1.0 f 1.0 f c2 1.0 f 400k ? +5v 400k ? +5v 6 9 10 r1 in r2 in r2 out r1 out 5 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 v+ v cc gnd t1 out t2 out v- c- c+ max231 r1 in r1 out t1 in n.c. n.c. t2 in r2 out r2 in so (12) rs-232 outputs ttl/cmos inputs (11) (13) (10) v cc pin numbers in ( ) are for so package 14 13 12 11 10 9 8 1 2 3 4 5 6 7 v+ v cc gnd t1 out t2 out v- c- c+ max231 r1 in r1 out t1 in t2 in r2 out r2 in dip +7.5v to +12v (16) t1 t2 r1 r2 top view figure 10. max231 pin configurations and typical operating circuit
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers ______________________________________________________________________________________ 21 2 1 5 18 t2 in t1 in t1 out t2 out +5v input rs-232 outputs ttl/cmos outputs gnd gnd 69 400k ? +5v 400k ? +5v 5k ? 5k ? 7 20 3 4 r1 in r2 in r2 out r1 out 19 rs-232 outputs ttl/cmos inputs v cc ( ) are for so package only. 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 r2 in t2 out v- r1 in r1 out t1 in c2- c2+ v+ (c1-) c1- (c1+) (v+) c1+ v cc gnd t1 out 12 11 9 10 v- (c2+) c2+ (c2-) (v-) cs- gnd dip/so max233 max233a t2 in r2 out c1+ c1- v- v- v+ c2+ c2- c2- c2+ 8 (13) 13 (14) 12 (10) 17 14 (8) 11 (12) 15 16 10 (11) do not make connections to these pins internal -10 power supply internal +10v power supply 1.0 f top view figure 11. max233/max233a pin configuration and typical operating circuit 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 t3 out t4 out t4 in t3 in t1 in t2 in t2 out t1 out max234 v- c2- c2+ c1- v+ c1+ v cc gnd dip/so v+ v- 8 c1+ c1- 1.0 f 1.0 f 1.0 f 7 9 10 11 4 3 13 14 12 1 3 16 15 t1 in t3 in t2 in t4 in t1 out t3 out t2 out t4 out +5v input c2- c2+ rs-232 outputs ttl/cmos inputs gnd 5 +5v +5v +10v to -10v voltage inverter v cc +5v to +10v voltage doubler 6 +5v +5v 400k ? 400k ? 400k ? 400k ? 1.0 f 1.0 f t1 t2 t4 t3 top view figure 12. max234 pin configuration and typical operating circuit
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers 22 ______________________________________________________________________________________ 1.0 f +5v input gnd 11 6 23 5 r2 out rs-232 inputs ttl/cmos outputs 14 13 21 r5 out 5k ? 17 18 r4 out 5k ? 24 r3 out 5k ? 24 23 22 21 20 19 18 17 1 2 3 4 5 6 7 8 r3 in r3 out t5 in shdn t2 out t1 out t3 out t4 out en t5 out r4 in r4 out t1 in t2 in r2 out r2 in 16 15 14 13 9 10 11 12 t4 in t3 in r5 out r5 in v cc gnd r1 in r1 out dip max235 5k ? 910 r1 out r1 in r2 in r3 in r4 in r5 in 5k ? 7 15 3 4 t2 in t3 out rs-232 outputs ttl/cmos inputs 22 19 t5 in t5 out +5v 16 1 t4 in t4 out +5v 2 t3 in +5v +5v 8 t1 in t1 out +5v t2 out t1 t1 r2 r3 r4 r5 t2 t3 t5 t4 400k ? 400k ? 400k ? 400k ? 400k ? shdn en 20 12 v cc top view figure 13. max235 pin configuration and typical operating circuit
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers ______________________________________________________________________________________ 23 gnd 8 23 r2 out rs-232 inputs ttl/cmos outputs 17 16 21 r3 out r2 in r3 in 5k ? 5k ? 5 4 r1 out r1 in 5k ? rs-232 outputs ttl/cmos inputs r1 r2 r3 2 7 t1 in t1 out +5v t1 400k ? 6 3 t2 in +5v t2 out t2 400k ? 18 t3 out 1 t3 in +5v t3 400k ? 19 24 t4 in t4 out +5v t4 400k ? shdn en 20 11 c1+ c1- 1.0 f 10 12 13 14 15 +5v input c2+ c2- v cc +5v to +10v voltage doubler 9 1.0 f 1.0 f +10v to -10v voltage inverter 22 24 23 22 21 20 19 18 17 1 2 3 4 5 6 7 8 t4 out r2 in r2 out shdn r1 in t2 out t1 out t3 out t4 in t3 in r3 out gnd t1 in t2 in r1 out 16 15 14 13 9 10 11 12 r3 in v- c2- c2+ c1- v+ c1+ v cc dip/so max236 en 1.0 f 1.0 f top view v+ v- figure 14. max236 pin configuration and typical operating circuit
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers 24 ______________________________________________________________________________________ gnd 8 23 r2 out rs-232 inputs ttl/cmos outputs 17 16 r3 out r2 in r3 in 5k ? 5k ? 5 4 r1 out r1 in 5k ? rs-232 outputs ttl/cmos inputs r1 r2 r3 2 7 t1 in t1 out +5v t1 400k ? 6 3 t2 in +5v t2 out t2 400k ? 18 t3 out 1 t3 in +5v t3 400k ? 21 20 t5 in t5 out +5v t5 400k ? 11 c1+ c1- 1.0 f 10 12 13 14 15 +5v input c2+ c2- v cc +5v to +10v voltage doubler 9 1.0 f 1.0 f +10v to -10v voltage inverter 22 24 23 22 21 20 19 18 17 1 2 3 4 5 6 7 8 t4 out r2 in r2 out t5 in r1 in t2 out t1 out t3 out t4 in t3 in r3 out gnd t1 in t2 in r1 out 16 15 14 13 9 10 11 12 r3 in v- c2- c2+ c1- v+ c1+ v cc dip/so max237 t5 out 1.0 f 1.0 f 19 24 t4 in t4 out +5v t4 400k ? v+ v- top view figure 15. max237 pin configuration and typical operating circuit
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers ______________________________________________________________________________________ 25 gnd 8 3 r2 out 22 23 r3 out r2 in r3 in 5k ? 5k ? 6 7 r1 out r1 in 5k ? rs-232 outputs ttl/cmos inputs rs-232 inputs ttl/cmos outputs r1 r2 r3 17 16 r4 out r4 in 5k ? r4 2 5 t1 in t1 out +5v 400k ? +5v 18 1 t2 in t2 out t2 400k ? 19 t3 out 24 t3 in +5v t3 400k ? 11 c1+ c1- 1.0 f 10 12 13 14 15 +5v input c2+ c2- v cc +5v to +10v voltage doubler 9 1.0 f 1.0 f +10v to -10v voltage inverter 4 1.0 f 1.0 f 21 20 t4 in t4 out +5v t4 400k ? t1 24 23 22 21 20 19 18 17 1 2 3 4 5 6 7 8 t3 out r3 in r3 out t4 in r2 out r2 in t1 out t2 out top view t3 in t2 in r4 out gnd r1 in r1 out t1 in 16 15 14 13 9 10 11 12 r4 in v- c2- c2+ c1- v+ c1+ v cc dip/so max238 t4 out v+ v- figure 16. max238 pin configuration and typical operating circuit
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers 26 ______________________________________________________________________________________ gnd 3 18 r3 out 12 r4 out r3 in r4 in 5k ? 5k ? 22 21 r2 out r2 in 5k ? rs-232 outputs ttl/cmos inputs rs-232 inputs ttl/cmos outputs r2 1 2 r1 out r1 in 5k ? r1 r3 r4 10 9 r5 out r5 in 5k ? r5 19 24 t1 in t1 out +5v 400k ? +5v 23 20 t2 in t2 out t2 400k ? 16 t3 out 13 t3 in +5v t3 400k ? c1+ c1- 1.0 f 6 v cc 8 +5v input 4 5 1.0 f +10v to -10v voltage inverter 17 1.0 f t1 24 23 22 21 20 19 18 17 1 2 3 4 5 6 7 8 t1 in t2 in r2 out r2 in v cc gnd r1 in r1 out t1 out r3 in r3 out v- c- c+ v+ 16 15 14 13 9 10 11 12 t3 in n.c. en t3 out r4 in r4 out r5 out r5 in dip/so max239 t2 out 7.5v to 13.2v input 7 v+ 11 en 14 15 n.c. v- top view figure 17. max239 pin configuration and typical operating circuit
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers ______________________________________________________________________________________ 27 gnd 18 4 r3 out 40 r4 out r3 in r4 in 5k ? 5k ? 13 10 r2 out r2 in 5k ? rs-232 inputs ttl/cmos outputs rs-232 outputs ttl/cmos inputs r2 16 17 r1 out r1 in 5k ? r1 r3 r4 36 35 r5 out r5 in 5k ? r5 7 15 t1 in t1 out +5v 400k ? +5v 14 8 t2 in t2 out t2 400k ? 37 t3 out 6 t3 in +5v t3 400k ? c1+ c1- 1.0 f 25 v cc +5v input 19 30 1.0 f 26 1.0 f +5v to +10v voltage doubler 3 1.0 f t1 +5v 2 41 t5 in t5 out t5 400k ? 5 38 t4 in t4 out +5v 400k ? t4 27 c2+ c2- 28 1.0 f 29 +5v to -10v voltage inverter v+ 39 en 42 43 plastic fp max240 shdn en t5 out r4 in r4 out r5 out r5 in n.c. n.c. t3 in t4 in r2 out t2 in t1 in r1 out r1 in n.c. n.c. n.c. n.c. v cc gnd r2 in n.c. t4 out t2 out t1 out t3 out n.c. r3 in r3 out n.c. t5 in n.c. c1+ c2 v+ c1- c2+ n.c. v- n.c. n.c. n.c. 33 32 31 30 29 28 27 26 25 24 23 34 35 36 37 38 39 40 41 42 43 44 1 2 3 4 5 6 7 8 9 10 11 22 21 20 19 18 17 16 15 14 13 12 shdn top view v- figure 18. max240 pin configuration and typical operating circuit
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers 28 ______________________________________________________________________________________ v+ v- 2 +10v c1+ c1- 1 3 4 5 11 10 12 9 6 14 7 13 8 t1 in r1 out t2 in r2 out t1 out r1 in t2 out r2 in +5v input c2+ c2- -10v rs-232 outputs rs-232 inputs ttl/cmos inputs ttl/cmos outputs gnd 15 5k ? 5k ? 400k ? 400k ? +5v +5v +10v to -10v voltage inverter +5v to +10v voltage doubler 16 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 c1+ v cc gnd t1 out r1 in r1 out t1 in t2 in r2 out max243 dip/so v+ c1- v- c2+ c2- t2 out r2 in 0.1 f 0.1 f 0.1 f 0.1 f all capacitors = 0.1 f 0.1 f receiver input -3 v open +3v r1 output high high low r2 output high low low top view v cc figure 19. max243 pin configuration and typical operating circuit
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers ______________________________________________________________________________________ 29 400k ? +10v to -10v voltage inverter +5v to +10v voltage doubler v cc 400k ? 400k ? gnd +5v +5v +5v +5v +5v 25 24 23 21 20 2 1 f 1 f 1 f 1 f 1 f 16 3 17 4 18 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? c2- c2+ c1- c1+ t a2 out t a2 in t a3 out t a3 in t a4 out t a4 in 9r a1 in 10 r a1 out 8r a2 in 11 r a2 out 7r a3 in 12 r a3 out 6r a4 in 13 r a4 out 5r a5 in 14 19 r a5 out 26 22 43 29 42 28 41 27 36 35 37 34 38 33 39 32 40 31 v- v+ t b2 out t b2 in 400k ? 2 15 t a1 out t a1 in 44 30 t b1 out t b1 in t b3 out t b3 in t b4 out t b4 in r b1 in r b1 out r b2 in r b2 out r b3 in r b3 out r b4 in r b4 out r b5 in r b5 out max249 functional description 10 receivers 5 a-side receiver 5 b-side receiver 8 transmitters 4 a-side transmitters 4 b-side transmitters no control pins 44 1 2 3 440 41 42 43 5 21 24 26 25 27 28 22 23 19 20 8 9 10 11 12 13 14 15 16 17 29 30 31 32 33 34 35 36 37 38 t a3 in v cc r a5 in max244 plcc top view t a4 out t a3 out t a2 out t a1 out t b1 out t b2 out t b3 out tb 4 out r b5 in gnd v+ c1+ c2+ c1- v- c2- t b3 in t b4 in r b3 in r b2 in r b1 in r b1 out r b2 out r b3 out r b4 out r b5 out t b1 in t b2 in t a2 in t a1 in r a5 out r a4 out r a3 out r a2 out r a1 out r a1 in r a2 in 7 39 r b4 in r a3 in 6 18 r a4 in t a4 in +5v +5v +5v +5v figure 20. max244 pin configuration and typical operating circuit
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers 30 ______________________________________________________________________________________ 400k ? v cc 400k ? 400k ? gnd +5v +5v +5v +5v +5v 40 17 1 f 3 18 4 19 5 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? t a2 out t a2 in t a3 out t a3 in t a4 out t a4 in 1 11 r a1 in 10 r a1 out 12 r a2 in 9r a2 out 13 r a3 in 8r a3 out 14 r a4 in 7r a4 out 15 r a5 in 6 20 r a5 out 23 37 22 36 21 35 29 30 28 31 27 32 26 33 25 34 t b2 out t b2 in t b3 out t b3 in t b4 out t b4 in r b1 in r b1 out r b2 in r b2 out r b3 in r b3 out r b4 in r b4 out r b5 in r b5 out +5v +5v 400k ? 16 2 t a1 out t a1 in 24 38 t b1 out t b1 in +5v +5v 40 v cc ent t b1 in t b2 in t b3 in t b4 in r b5 out r b4 out r b3 out r b2 out r b1 out r b1 in r b2 in r b3 in r b4 in r b5 in t b1 out t b2 out t b3 out t b4 out 39 38 37 36 35 34 33 32 31 1 2 3 4 5 6 7 8 9 10 enr t a1 in t a2 in t a3 in t a4 in r a5 out r a4 out r a3 out r a2 out r a1 out r a1 in r a2 in r a3 in r a4 in r a5 in t a1 out t a2 out t a3 out t a4 out gnd top view max245 30 29 28 27 26 25 24 23 22 21 11 12 13 14 15 16 17 18 19 dip 20 max245 functional description 10 receivers 5 a-side receivers (r a5 always active) 5 b-side receivers (r b5 always active) 8 transmittters 4 a-side transmitters 2 control pins 1 receiver enable (enr) 1 transmitter enable (ent) 39 enr ent figure 21. max245 pin configuration and typical operating circuit
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers ______________________________________________________________________________________ 31 400k ? v cc 400k ? gnd +5v +5v +5v +5v +5v 40 16 1 f 2 18 4 t a1 out t a1 in t a3 out t a3 in 20 24 38 22 36 1 39 t b1 out t b1 in t b3 out t b3 in 400k ? +5v 17 3 t a2 out t a2 in +5v 23 37 t b2 out t b2 in 400k ? +5v 19 5 t a4 out t a4 in +5v 21 35 t b4 out t b4 in 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 11 r a1 in 10 r a1 out 12 r a2 in 9r a2 out 13 r a3 in 8r a3 out 14 r a4 in 7r a4 out 15 r a5 in 6r a5 out 29 30 28 31 27 32 26 33 25 34 r b1 in r b1 out r b2 in r b2 out r b3 in r b3 out r b4 in r b4 out r b5 in r b5 out 40 v cc enb t b1 in t b2 in t b3 in t b4 in r b5 out r b4 out r b3 out r b2 out r b1 out r b1 in r b2 in r b3 in r b4 in r b5 in t b1 out t b2 out t b3 out t b4 out 39 38 37 36 35 34 33 32 31 1 2 3 4 5 6 7 8 9 10 ena t a1 in t a2 in t a3 in t a4 in r a5 out r a4 out r a3 out r a2 out r a1 out r a1 in r a2 in r a3 in r a4 in r a5 in t a1 out t a2 out t a3 out t a4 out gnd top view max246 30 29 28 27 26 25 24 23 22 21 11 12 13 14 15 16 17 18 19 dip 20 max246 functional description 10 receivers 5 a-side receivers (r a5 always active) 5 b-side receivers (r b5 always active) 8 transmitters 4 a-side transmitters 4 b-side transmitters 2 control pins enable a-side (ena) enable b-side (enb) ena enb figure 22. max246 pin configuration and typical operating circuit
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers 32 ______________________________________________________________________________________ 400k ? v cc 400k ? gnd +5v +5v +5v +5v +5v 1 40 16 1 f 2 18 4 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? enta t a1 out t a1 in t a3 out t a3 in 6r b5 out 12 r a1 in 10 r a1 out 13 r a2 in 9r a2 out 14 r a3 in 8r a3 out 15 r a4 in 7 20 r a4 out 11 39 24 38 22 36 29 31 28 32 27 33 26 34 30 enra entb t b1 out t b1 in t b3 out t b3 in r b1 in 5k ? 25 r b5 in r b1 out r b2 in r b2 out r b3 in r b3 out r b4 in r b4 out enrb 400k ? +5v 17 3 t a2 out t a2 in +5v 23 37 t b2 out t b2 in 400k ? +5v 19 5 t a4 out t a4 in +5v 21 35 t b4 out t b4 in 40 v cc entb t b1 in t b2 in t b3 in t b4 in r b4 out r b3 out r b2 out r b1 out r b1 in r b2 in r b3 in r b4 in r b5 in t b1 out t b2 out t b3 out t b4 out 39 38 37 36 35 34 33 32 31 1 2 3 4 5 6 7 8 9 10 enta t a1 in t a2 in t a3 in t a4 in r b5 out r a4 out r a3 out r a2 out r a1 out r a1 in r a2 in r a3 in r a4 in t a1 out t a2 out t a3 out t a4 out gnd top view max247 30 29 28 27 26 25 24 23 22 21 11 12 13 14 15 16 17 18 19 dip 20 enra enrb max247 functional description 9 receivers 4 a-side receivers 5 b-side receivers (r b5 always active) 8 transmitters 4 a-side transmitters 4 b-side transmitters 4 control pins enable receiver a-side (enra) enable receiver b-side (enrb) enable receiver a-side (enta) enable receiverr b-side (entb) figure 23. max247 pin configuration and typical operating circuit
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers ______________________________________________________________________________________ 33 400k ? +10v to -10v voltage inverter +5v to +10v voltage doubler v cc 400k ? gnd +5v +5v +5v +5v +5v 18 25 24 23 21 20 1 1 f 1 f 1 f 1 f 1 f 14 3 16 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? enta c2- c2+ c1- c1+ t a1 out t a1 in t a3 out t a3 in 8r a1 in 10 r a1 out 7r a2 in 11 r a2 out 6r a3 in 12 r a3 out 5r a4 in 13 19 r a4 out 9 27 26 22 44 31 42 29 37 35 38 34 39 33 40 32 36 enra entb v- v+ t b1 out t b1 in t b3 out t b3 in r b1 in r b1 out r b2 in r b2 out r b3 in r b3 out r b4 in r b4 out enrb 400k ? +5v 2 15 t a2 out t a2 in +5v 43 30 t b2 out t b2 in 400k ? +5v 4 17 t a4 out t a4 in +5v 41 28 t b4 out t b4 in 44 1 2 3 440 41 42 43 5 21 24 26 25 27 28 22 23 19 20 8 9 10 11 12 13 14 15 16 17 29 30 31 32 33 34 35 36 37 38 t a4 in v cc r a4 in max248 plcc top view t a4 out t a3 out t a2 out t a1 out t b1 out t b2 out t b3 out t a4 out r b4 in gnd v+ c1+ c2+ c1- v- c2- t b4 in entb r b2 in r b1 in r b1 out r b2 out r b3 out r b4 out t b1 in t b2 in t b3 in t a3 in t a2 in t a1 in r a4 out r a3 out r a2 out r a1 out enra r a1 in 7 39 r b3 in r a2 in 6 18 r a3 in enrb enta max248 functional description 8 receivers 4 a-side receivers 4 b-side receivers 8 transmitters 4 a-side transmitters 4 b-side transmitters 4 control pins enable receiver a-side (enra) enable receiver b-side (enrb) enable receiver a-side (enta) enable receiver b-side (entb ) figure 24. max248 pin configuration and typical operating circuit
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers 34 ______________________________________________________________________________________ 400k ? +10v to -10v voltage inverter +5v to +10v voltage doubler v cc 400k ? 400k ? gnd +5v +5v +5v +5v +5v +5v +5v 18 25 24 23 21 20 1 1 f 1 f 1 f 1 f 15 2 16 3 17 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? 5k ? enta c2- c2+ c1- c1+ t a1 out t a1 in t a2 out t a2 in t a3 out t a3 in 8r a1 in 10 r a1 out 7r a2 in 11 r a2 out 6r a3 in 12 r a3 out 5r a4 in 13 r a4 out 4r a5 in 14 19 r a5 out 9 27 26 22 44 30 43 29 42 28 37 35 38 34 39 33 40 32 41 31 36 enra entb v- v+ t b1 out t b1 in t b2 out t b2 in t b3 out t b3 in r b1 in r b1 out r b2 in r b2 out r b3 in r b3 out r b4 in r b4 out r b5 in r b5 out enrb 44 1 2 3 440 41 42 43 5 21 24 26 25 27 28 22 23 19 20 8 9 10 11 12 13 14 15 16 17 29 30 31 32 33 34 35 36 37 38 v cc r a4 in r a5 in max249 plcc top view t a3 out t a2 out t a1 out t b1 out t b2 out t b3 out r b4 in r b5 in gnd v+ c1+ c2+ c1- v- c2- t b3 in entb r b2 in r b1 in r b1 out max249 functional description 10 receivers 5 a-side receivers 5 b-side receivers 6 transmitters 3 a-side transmitters 3 b-side transmitters 4 control pins enable receiver a-side (enra) enable receiver b-side (enrb) enable receiver a-side (enta) enable receiver b-side (entb) r b2 out r b3 out r b4 out r b5 out t b1 in t b2 in t a3 in t a2 in t a1 in r a4 out r a5 out r a3 out r a2 out r a1 out enra r a1 in 7 39 r b3 in r a2 in 6 18 r a3 in enrb enta 1 f figure 25. max249 pin configuration and typical operating circuit
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers ______________________________________________________________________________________ 35 ___________________________________________ordering information (continued) part max222 cpn 0 c to +70 c temp range pin-package part temp range pin-package 18 plastic dip max222cwn 0 c to +70 c 18 wide so max222c/d 0 c to +70 c dice* max222epn -40 c to +85 c 18 plastic dip max222ewn -40 c to +85 c 18 wide so max222ejn -40 c to +85 c 18 cerdip max222mjn -55 c to +125 c 18 cerdip max223 cai 0 c to +70 c 28 ssop max223cwi 0 c to +70 c 28 wide so max223c/d 0 c to +70 c dice* max223eai -40 c to +85 c 28 ssop max223ewi -40 c to +85 c 28 wide so max225 cwi 0 c to +70 c 28 wide so max225ewi -40 c to +85 c 28 wide so max230 cpp 0 c to +70 c 20 plastic dip max230cwp 0 c to +70 c 20 wide so max230c/d 0 c to +70 c dice* max230epp -40 c to +85 c 20 plastic dip max230ewp -40 c to +85 c 20 wide so max230ejp -40 c to +85 c 20 cerdip max230mjp -55 c to +125 c 20 cerdip max231 cpd 0 c to +70 c 14 plastic dip max231cwe 0 c to +70 c 16 wide so max231cjd 0 c to +70 c 14 cerdip max231c/d 0 c to +70 c dice* max231epd -40 c to +85 c 14 plastic dip max231ewe -40 c to +85 c 16 wide so max231ejd -40 c to +85 c 14 cerdip max231mjd -55 c to +125 c 14 cerdip max232 cpe 0 c to +70 c 16 plastic dip max232cse 0 c to +70 c 16 narrow so max232cwe 0 c to +70 c 16 wide so max232c/d 0 c to +70 c dice* max232epe -40 c to +85 c 16 plastic dip max232ese -40 c to +85 c 16 narrow so max232ewe -40 c to +85 c 16 wide so max232eje -40 c to +85 c 16 cerdip max232mje -55 c to +125 c 16 cerdip max232mlp -55 c to +125 c 20 lcc max232a cpe 0 c to +70 c 16 plastic dip max232acse 0 c to +70 c 16 narrow so max232acwe 0 c to +70 c 16 wide so max232ac/d max232aepe -40 c to +85 c 16 plastic dip max232aese 0 c to +70 c dice* -40 c to +85 c 16 narrow so max232aewe -40 c to +85 c 16 wide so max232aeje -40 c to +85 c 16 cerdip max232amje -55 c to +125 c 16 cerdip max232amlp -55 c to +125 c 20 lcc max233 cpp 0 c to +70 c 20 plastic dip max233epp -40 c to +85 c 20 plastic dip max233a cpp 0 c to +70 c 20 plastic dip max233acwp 0 c to +70 c 20 wide so max233aepp -40 c to +85 c 20 plastic dip max233aewp -40 c to +85 c 20 wide so max234 cpe 0 c to +70 c 16 plastic dip max234cwe 0 c to +70 c 16 wide so max234c/d 0 c to +70 c dice* max234epe -40 c to +85 c 16 plastic dip max234ewe -40 c to +85 c 16 wide so max234eje -40 c to +85 c 16 cerdip max234mje -55 c to +125 c 16 cerdip max235 cpg 0 c to +70 c 24 wide plastic dip max235epg -40 c to +85 c 24 wide plastic dip max235edg -40 c to +85 c 24 ceramic sb max235mdg -55 c to +125 c 24 ceramic sb max236 cng 0 c to +70 c 24 narrow plastic dip max236cwg 0 c to +70 c 24 wide so max236c/d 0 c to +70 c dice* max236eng -40 c to +85 c 24 narrow plastic dip max236ewg -40 c to +85 c 24 wide so max236erg -40 c to +85 c 24 narrow cerdip max236mrg -55 c to +125 c 24 narrow cerdip max237 cng 0 c to +70 c 24 narrow plastic dip max237cwg 0 c to +70 c 24 wide so max237c/d 0 c to +70 c dice* max237eng -40 c to +85 c 24 narrow plastic dip max237ewg -40 c to +85 c 24 wide so max237erg -40 c to +85 c 24 narrow cerdip max237mrg -55 c to +125 c 24 narrow cerdip max238 cng 0 c to +70 c 24 narrow plastic dip max238cwg 0 c to +70 c 24 wide so max238c/d 0 c to +70 c dice* max238eng -40 c to +85 c 24 narrow plastic dip * contact factory for dice specifications.
max220?ax249 +5v-powered, multichannel rs-232 drivers/receivers ___________________________________________ordering information (continued) * contact factory for dice specifications. 18 cerdip -55 c to +125 c max242mjn 18 cerdip -40 c to +85 c max242ejn 18 wide so -40 c to +85 c max242ewn 18 plastic dip -40 c to +85 c max242epn dice* 0 c to +70 c max242c/d 18 wide so 0 c to +70 c max242cwn 18 plastic dip 0 c to +70 c max242cpn 20 ssop 0 c to +70 c max242 cap 28 wide so -40 c to +85 c max241ewi 28 ssop -40 c to +85 c max241eai dice* 0 c to +70 c max241c/d 28 wide so 0 c to +70 c max241cwi 28 ssop 0 c to +70 c max241 cai dice* 0 c to +70 c max240c/d 44 plastic fp 0 c to +70 c max240 cmh 24 narrow cerdip -55 c to +125 c max239mrg 24 narrow cerdip -40 c to +85 c max239erg 24 wide so -40 c to +85 c max239ewg 24 narrow plastic dip -40 c to +85 c max239eng dice* 0 c to +70 c max239c/d 24 wide so 0 c to +70 c max239cwg 24 narrow plastic dip 0 c to +70 c max239 cng 24 narrow cerdip -55 c to +125 c 24 wide so pin-package temp range -40 c to +85 c max238mrg 24 narrow cerdip -40 c to +85 c max238erg max238ewg part pin-package temp range part 44 plcc -40 c to +85 c max249eqh 44 plcc 0 c to +70 c max249 cqh 44 plcc -40 c to +85 c max248eqh dice* 0 c to +70 c max248c/d 44 plcc 0 c to +70 c max248 cqh 40 plastic dip -40 c to +85 c max247epl dice* 0 c to +70 c max247c/d 40 plastic dip 0 c to +70 c max247 cpl 40 plastic dip -40 c to +85 c max246epl dice* 0 c to +70 c max246c/d 40 plastic dip 0 c to +70 c max246 cpl 40 plastic dip -40 c to +85 c max245epl dice* 0 c to +70 c max245c/d 40 plastic dip 0 c to +70 c max245 cpl 44 plcc -40 c to +85 c max244eqh dice* 0 c to +70 c max244c/d 44 plcc 0 c to +70 c max244 cqh 16 cerdip -55 c to +125 c max243mje 16 cerdip -40 c to +85 c max243eje 16 wide so -40 c to +85 c max243ewe 16 narrow so -40 c to +85 c max243ese 16 plastic dip -40 c to +85 c max243epe dice* 0 c to +70 c max243c/d 16 wide so 0 c to +70 c 16 plastic dip 0 c to +70 c max243cwe 16 narrow so 0 c to +70 c max243cse max243 cpe maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. 36 __________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 (408) 737-7600 ? 2004 maxim integrated products printed usa is a registered trademark of maxim integrated products. package information for the latest package outline information, go to www.maxim-ic.com/packages .

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