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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 5?. 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 0.1? external capacitors (max3246e available in a ucsp package) ? ? for low-cost applications max221e: ?5kv esd-protected, +5v, 1?, single rs-232 transceiver with autoshutdown +5v-powered, multichannel rs-232 drivers/receivers selection table 19-4323; rev 16; 7/10 part MAX220cpe+ 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 ordering information + denotes a lead(pb)-free/rohs-compliant package. * contact factory for dice specifications. ordering information continued at end of data sheet. autoshutdown and ucsp are trademarks of maxim integrated products, inc. selection table functional diagrams pin configurations appear at end of data sheet. functional diagrams continued at end of data sheet. ucsp is a trademark of maxim integrated products, inc. available for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim?s website at www.maxim integrated.com. MAX220Cmax249 MAX220Cmax249
+5v-powered, multichannel rs-232 drivers/receivers 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 3) 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 tout in high-impedance state, v shdn or v cc = 0v. stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. (voltages referenced to gnd.) v cc ...........................................................................-0.3v to +6v v+ (note 1) ..................................................(v cc - 0.3v) to +14v v- (note 1) ..............................................................+0.3v to -14v input voltages tin .............................................................-0.3v to (v cc - 0.3v) rin (except MAX220) ........................................................?0v rin (MAX220) ....................................................................?5v tout (except MAX220) (note 2) ......................................?5v tout (MAX220)..............................................................?3.2v output voltages tout..................................................................................?5v rout........................................................-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) .................................+300? soldering temperature (reflow) 20 pdip (p20m+1) .......................................................+225? all other lead(pb)-free packages.................................+260? all other packages containing lead(pb) ......................+240? 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-low voltage 1.4 0.8 v all devices except MAX220 2 1.4 input logic-high voltage MAX220: v cc = +5.0v 2.4 v all except MAX220, normal operation 5 40 logic pullup/lnput current v shdn = 0v, max222/max242, shutdown, MAX220 0.01 1 a v cc = +5.5v, v shdn = 0v, v out = 15v, max222/max242 0.01 10 v out = 15v 0.01 10 output leakage current v cc = v 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 r2in 0.8 1.3 rs-232 input threshold low v cc = +5v max243 r2in (note 4) -3 v all except max243 r2in 1.8 2.4 rs-232 input threshold high v cc = +5v max243 r2in (note 4) -0.5 -0.1 v 2 maxim integrated MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers 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.) (note 3) parameter conditions min typ max units all except MAX220/max243, v cc = +5v, no hysteresis in shutdown 0.2 0.5 1.0 MAX220 0.3 rs-232 input hysteresis max243 1 v 3 5 7 rs-232 input resistance t a = +25c (MAX220) 3 5 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 = v gnd -2 -10 ttl/cmos output short-circuit current sinking v out = v cc 10 30 ma ttl/cmos output leakage current v shdn = v cc or v en = v cc (v shdn = 0v for max222), 0v v out v cc 0.05 10 a en input threshold low max242 1.4 0.8 v en input threshold high max242 2.0 1.4 v supply voltage range 4.5 5.5 v MAX220 0.5 2 no load max222/max232a/max233a/ max242/max243 4 10 MAX220 12 v cc supply current (v shdn = v cc ), figures 5, 6, 11, 19 3k load both inputs max222/max232a/max233a/ max242/max243 15 ma t a = +25c 0.1 10 t a = 0c to +70c 2 50 t a = -40c to +85c 2 50 shutdown supply current max222/ max242 t a = -55c to +125c 35 100 a shdn input leakage current max222/max242 1 a 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 6 12 30 transition slew rate c l = 50pf to 2500pf, r l = 3k to 7k , v cc = +5v, t a = +25c, measured from +3v to -3v or -3v to +3v MAX220 1.5 3 30.0 v/s max222/max232a/ max233/max242/max243 1.3 3.5 t phlt , figure 1 MAX220 4 10 max222/max232a/ max233/max242/max243 1.5 3.5 transmitter propagation delay tll to rs-232 (normal operation) t plht , figure 1 MAX220 5 10 s maxim integrated 3 MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers __________________________________________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 0.1f either v+ or v- loaded v cc = +5v no load on transmitter outputs (except MAX220, max233a) v- loaded, no load on v+ v+ loaded, no load on v- 1f 1f 0.1f 11 10 4 010 40 60 available output current vs. data rate 6 5 7 9 8 MAX220-02 data rate (kb/s) output current (ma) 20 30 50 output load current flows from v+ to v- v cc = +5.25v all caps 1f all caps 0.1f v cc = +4.75v +10v -10v max222/max242 on-time exiting shutdown +5v +5v 0v 0v MAX220-03 500s/div v+, v- voltage (v) 1f caps v+ v+ v- v- shdn 0.1f caps 1f caps 0.1f caps 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.) (note 3) parameter conditions min typ max units max222max232amax233 max22max23 phr 2 max22 3 max222max232amax233 max22max23 r p d rs- 232 t n o phr 2 max22 3 phs 2 max22 r p d rs- 232 t s phs 2 max22 2 r-o e t er max22 3 2 r-o d t dr max22 3 t-o e t shdn g h et max222max22 - - 2 t-o d t shdn g dt max222max22 max222max232amax233 max22max23 3 t - p d d n o pht - pht max22 2 max222max232amax233 max22max23 r - p d d n o phr - phr max22 22 note 3: all units are production tested at hot. specifications over temperature are guaranteed by design. note 4: max243 r2out is guaranteed to be low when r2in 0v or is unconnected. 4 maxim integrated MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers (voltages referenced to gnd.) v cc ...........................................................................-0.3v to +6v v+ ................................................................(v cc - 0.3v) to +14v v- ............................................................................+0.3v to -14v input voltages tin ............................................................-0.3v to (v cc + 0.3v) rin .....................................................................................?0v output voltages tout ..................................................(v+ + 0.3v) to (v- - 0.3v) rout........................................................-0.3v to (v cc + 0.3v) short-circuit duration, tout to gnd ........................continuous continuous power dissipation (t a = +70?) 14-pin plastic dip (derate 10.00mw/? above +70?)....800mw 16-pin plastic dip (derate 10.53mw/? above +70?)....842mw 20-pin plastic dip (derate 11.11mw/? above +70?)....889mw 24-pin narrow plastic dip (derate 13.33mw/? above +70?) ..........1.07w 24-pin plastic dip (derate 9.09mw/? above +70?)......500mw 16-pin wide so (derate 9.52mw/? above +70?).........762mw 20-pin wide so (derate 10.00mw/? above +70?).......800mw 24-pin wide so (derate 11.76mw/? above +70?).......941mw 28-pin wide so (derate 12.50mw/? above +70?) .............1w 44-pin plastic fp (derate 11.11mw/? above +70?) .....889mw 14-pin cerdip (derate 9.09mw/? above +70?) ..........727mw 16-pin cerdip (derate 10.00mw/? above +70?) ........800mw 20-pin cerdip (derate 11.11mw/? above +70?) ........889mw 24-pin narrow cerdip (derate 12.50mw/? above +70?) ..............1w 24-pin sidebraze (derate 20.0mw/? above +70?)..........1.6w 28-pin ssop (derate 9.52mw/? above +70?).............762mw operating temperature ranges max2 _ _ c _ _......................................................0? to +70? max2 _ _ e _ _ ...................................................-40? to +85? max2 _ _ m _ _ ......................................................-55 c to +125? storage temperature range .............................-65? to +160? lead temperature (soldering, 10s) .................................+300? soldering temperature (reflow) 20 pdip (p20m+1) .........................................................+225? 24 pdip (p24m-1) ..........................................................+225? all other lead(pb)-free packages...................................+260? all other packages containing lead(pb) ........................... +240? absolute maximum ratings?ax223/max230?ax241 electrical characteristics?ax223/max230?ax241 (max223/230/232/234/236/237/238/240/241, v cc = +5v ?0%; max233/max235, v cc = +5v ?%?c1?4 = 1.0?; max231/max239, v cc = +5v ?0%; v+ = +7.5v to +13.2v; t a = t min to t max ; unless otherwise noted.) (note 5) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications 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 ?.0 ?.3 v v cc supply current no load, t a = +25? 510 ma 715 0.4 1 v+ supply current 1.8 5 ma 515 shutdown supply current t a = +25? 15 50 v input logic-high voltage tin 2.0 en, shdn (max223); en, shdn (max230/235/236/240/241) 2.4 logic pullup current v tin =0v 1.5 200 receiver input voltage operating range -30 +30 v ? ? 110 v input logic-low voltage tin, en, shdn (max233); en, shdn (max230/235?41) 0.8 max231/239 max223/230/234?38/240/241 max232/233 parameter max239 max230/235/236/240/241 max231 max223 maxim integrated 5 MAX220Cmax249 MAX220Cmax249 ma +5v-powered, multichannel rs-232 drivers/receivers v 0.8 1.2 parameter min typ max units conditions normal operation v shdn = 5v (max223) v shdn = 0v (max235/236/240/241) 1.7 2.4 rs-232 input logic-low voltage t a = +25?, v cc = +5v 0.6 1.5 v rs-232 input logic-high voltage t a = +25?, v cc = +5v shutdown (max223) v shdn = 0v, v en = +5v (r4in?r5in) 1.5 2.4 electrical characteristics?ax223/max230?ax241 (continued) (max223/230/232/234/236/237/238/240/241, v cc = +5v ?0%; max233/max235, v cc = +5v ?%?c1?4 = 1.0?; max231/max239, v cc = +5v ?0%; v+ = +7.5v to +13.2v; t a = t min to t max ; unless otherwise noted.) (note 5) shutdown (max223) v shdn = 0v, v en = +5v (r4in, r5in) normal operation v shdn = +5v (max223) v 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?, 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 ; v en = 0v (max223); v en = v cc (max235?41) ?.05 ?0 ? 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 ? v shdn = 0v (max223) 440 propagation delay rs-232 in to ttl/cmos out, c l = 150pf 640 3 5.1 30 v/? max231/max232/max233, t a = +25?, 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 = ?v 300 transmitter output short-circuit current ?0 ma t phls t plhs transition region slew rate max223/max230/max234?41, t a = +25?, v cc = +5v, r l = 3k to 7k?c l = 50pf to 2500pf, measured from +3v to -3v or -3v to +3v note 5: all units are production tested at hot except for the max240, which is production tested at t a = +25?. specifications over temperature are guaranteed by design. 6 maxim integrated MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers 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 = +25c c1?c4 = 1f 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 160kb/s 80kb/s 20kb/s t a = +25c v cc = +5v 3 transmitters loaded r l = 3k c1?c4 = 1f 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 = +25c v cc = +5v loaded, r l = 3k c1?c4 = 1f 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 = +25c c1?c4 = 1f 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 160kb/s 80kb/s 20kb/s t a = +25c v cc = +5v 3 transmitters loaded r l = 3k c1?c4 = 1f 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 = +25c v cc = +5v c1?c4 = 1f all transmitters unloaded v+ loaded, no load on v- __________________________________________typical operating characteristics max223/max230?ax241 *shutdown polarity is reversed v+, v- when exiting shutdown (1f capacitors) MAX220-13 v shdn * v- o v+ 500ms/div maxim integrated 7 MAX220Cmax249 MAX220Cmax249 input logic-low voltage +5v-powered, multichannel rs-232 drivers/receivers absolute maximum ratings?ax225/max244?ax249 electrical characteristics?ax225/max244?ax249 (max225, v cc = +5.0v ?%; max244?ax249, v cc = +5.0v ?0%, external capacitors c1?4 = 1?; t a = t min to t max ; unless otherwise noted.) (note 7) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. (voltages referenced to gnd.) supply voltage (v cc ) ...............................................-0.3v to +6v input voltages tin?ena, enb, enr, ent, enra, enrb, enta, entb ..................................-0.3v to (v cc + 0.3v) rin .....................................................................................?5v tout (note 6)....................................................................?5v rout........................................................-0.3v to (v cc + 0.3v) short circuit duration (one output at a time) tout to gnd ...........................................................continuous rout to gnd...........................................................continuous continuous power dissipation (t a = +70?) 28-pin wide so (derate 12.50mw/? above +70?) .............1w 40-pin plastic dip (derate 11.11mw/? above +70 ?) ...611mw 44-pin plcc (derate 13.33mw/? above +70?) ...........1.07w operating temperature ranges max225c_ _, max24_c_ _ ..................................0? to +70? max225e_ _, max24_e_ _ ...............................-40? to +85? storage temperature range .............................-65? to +160? lead temperature (soldering,10s)) .................................+300? soldering temperature (reflow) 40 pdip (p40m-2) ..........................................................+225? all other lead(pb)-free packages...................................+260? all other packages containing lead(pb) ........................+240? v cc = 0v, v out = ?5v ? tables 1a?d ?.01 ?5 normal operation shutdown tables 1a?d, normal operation all transmitter outputs loaded with 3k to gnd v ena , v enb , v ent , v enta , v entb = v cc, v out = ?5v v rs-232 input hysteresis rs-232 input logic-low voltage v v ? ?.5 output voltage swing output leakage current (shutdown) ?.01 ?5 300 10m v cc = v+ = v- = 0v, v out = ?v (note 8) transmitter output resistance ? parameter ?.05 ?.10 min typ max units normal operation, outputs disabled, tables 1a?d, 0v v out v cc , v enr_ = v cc ttl/cmos output leakage current 10 30 sinking v out = v cc ma -2 -10 sourcing v out = v 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 ?5 rs-232 input voltage operating range ma ? ?0 v out = 0v output short-circuit current kbps 120 64 data rate conditions v cc = +5v ? ?.01 ? logic pullup/lnput current 10 50 tables 1a?d rs-232 input logic-high voltage v 2 1.4 input logic-high voltage rs-232 transmitters rs-232 receivers note 6: input voltage measured with transmitter output in a high-impedance state, shutdown, or v cc = 0v. 8 maxim integrated MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers supply voltage range 4.75 5.25 v transmitter enable time max225 10 20 t et no load max244?ax249 11 30 51030 max225 40 v cc supply current (normal operation) 3k loads on all outputs max244?ax249 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/? max246?ax249 (excludes charge-pump startup) shutdown supply current ? 5 t phlt , figure 1 1.3 3.5 ? t plht , figure 1 1.5 3.5 transmitter disable time transmitter propagation delay tll to rs-232 (normal operation) ? t dt , figure 4 100 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?ax249 max225 leakage current ? logic-low voltage 1.4 0.8 control input logic-high voltage 2.4 1.4 v ? t a = +25? t phlr , figure 2 0.6 1.5 t plhr , figure 2 0.6 1.5 receiver propagation delay tll to rs-232 (normal operation) ? t phls , figure 2 0.6 10 t plhs , figure 2 3.0 10 receiver propagation delay tll to rs-232 (low-power mode) ? receiver-output enable time t er , figure 3 100 500 ns receiver-output disable time t dr , figure 3 100 500 ns max225/max245?ax249 (includes charge-pump startup) 10 ms power supply and control logic ac characteristics note 7: all units production tested at hot. specifications over temperature are guaranteed by design. note 8: 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?ax225/max244?ax249 (continued) (max225, v cc = +5.0v ?%; max244?ax249, v cc = +5.0v ?0%, external capacitors c1?4 = 1?; t a = t min to t max ; unless otherwise noted.) (note 7) maxim integrated 9 MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers __________________________________________typical operating characteristics max225/max244?ax249 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 20kb/s 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 40kb/s 60kb/s 100kb/s 200kb/s all capacitiors 1 f 10kb/s 20kb/s 10 maxim integrated MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers 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 test circuits/timing diagrams maxim integrated 11 MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers ent enr operation status transmitters receivers 0 0 normal operation all active all active 0 1 normal operation all active all high-z 1 0 shutdown all high-z all low-power receive mode 1 1 shutdown all high-z all high-z table 1a. max245 control pin configurations ent enr operation status transmitters receivers ta1?a4 tb1?b4 ra1?a5 rb1?b5 0 0 normal operation all active all active all active all active 0 1 normal operation all active all active ra1?a4 high-z, ra5 active rb1?b4 high-z, rb5 active 1 0 shutdown all high-z all high-z all low-power receive mode all low-power receive mode 1 1 shutdown all high-z all high-z ra1?a4 high-z, ra5 low-power receive mode rb1?b4 high-z, rb5 low-power receive mode table 1b. max245 control pin configurations table 1c. max246 control pin configurations ena enb operation status transmitters receivers ta1?a4 tb1?b4 ra1?a5 rb1?b5 0 0 normal operation all active all active all active all active 0 1 normal operation all active all high-z all active rb1?b4 high-z, rb5 active 1 0 shutdown all high-z all active ra1?a4 high-z, ra5 active all active 1 1 shutdown all high-z all high-z ra1?a4 high-z, ra5 low-power receive mode rb1?b4 high-z, ra5 low-power receive mode control pin configuration tables 12 maxim integrated MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers ta1?a4 tb1?b4 ra1?a4 rb1?b4 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 high-z, except rb5 stays active on max247 0 0 1 0 normal operation all active all active all high-z all active 0 0 1 1 normal operation all active all active all high-z all high-z, except rb5 stays active on max247 0 1 0 0 normal operation all active all high-z all active all active 0 1 0 1 normal operation all active all high-z all active all high-z, except rb5 stays active on max247 0 1 1 0 normal operation all active all high-z all high-z all active 0 1 1 1 normal operation all active all high-z all high-z all high-z, except rb5 stays active on max247 1 0 0 0 normal operation all high-z all active all active all active 1 0 0 1 normal operation all high-z all active all active all high-z, except rb5 stays active on max247 1 0 1 0 normal operation all high-z all active all high-z all active 1 0 1 1 normal operation all high-z all active all high-z all high-z, except rb5 stays active on max247 1 1 0 0 shutdown all high-z all high-z low-power receive mode low-power receive mode 1 1 0 1 shutdown all high-z all high-z low-power receive mode all high-z, except rb5 stays active on max247 1 1 1 0 shutdown all high-z all high-z all high-z low-power receive mode 1 1 1 1 shutdown all high-z all high-z all high-z all high-z, except rb5 stays active on max247 table 1d. max247/max248/max249 control pin configurations max248 operation status enrb max247 ta1?a4 tb1?b4 ra1?a4 rb1?b5 transmitters enra entb enta max249 ta1?a3 tb1?b3 ra1?a5 rb1?b5 receivers maxim integrated 13 MAX220Cmax249 MAX220Cmax249 _______________detailed description the MAX220?ax249 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?ax249 have two internal charge-pumps that convert +5v to ?0v (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?ax247, 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 ?v 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?ax249, 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 connected 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 ?v 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 ?v 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 pullup resistors to v cc are built in (except for the MAX220). the pullup resistors force the outputs of unused drivers low because all drivers invert. the internal input pullup resistors typically source 12?, except in shutdown mode where the pullups are dis- abled. driver outputs turn off and enter a high-imped- ance state?here leakage current is typically microamperes (maximum 25?)?hen in shutdown mode, in three-state mode, or when device power is removed. outputs can be driven to ?5v. the power- supply current typically drops to 8? in shutdown mode. the MAX220 does not have pullup 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 1? with the driver output pulled to ground. the driver output leakage remains less than 1?, 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/? as required by the eia/tia-232e and v.28 specifica- tions. typical slew rates are 24v/? unloaded and 10v/? 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 ?5v and provide input terminating resistors with +5v-powered, multichannel rs-232 drivers/receivers 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 __ 14 maxim integrated MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers 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?ax249 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 unconnected 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 ?k to send?state. normally?the max243? 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 uncon- nected?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 volt- age 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 2.5? 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 25? 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?a4 and rb1?b4 are put in a three-state mode when enr is a logic high. receiver and transmitter enable control inputs the max225 and max245?ax249 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. maxim integrated 15 MAX220Cmax249 MAX220Cmax249 tables 1a?d 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 maxim integrated MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers top view 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 v cc gnd t1out r1in c2+ c1- v+ c1+ + MAX220 max232 max232a r1out t1in t2in r2out r2in t2out v- c2- dip/so v+ v- 2 +10v c1+ c1 c2 1 3 4 5 11 10 12 9 6 14 7 13 8 t1in r1out t2in r2out t1out r1in t2out r2in +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 t1out c1- v+ c1+ (n.c.) en r1in r1out t1in t2in t2out v- c2- c2+ 10 9 r2out r2in max222 max242 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 shdn v cc gnd t1out c1- v+ c1+ (n.c.) en n.c. r1in r1out n.c. t2out v- c2- c2+ 12 11 9 10 t1in t2in r2out r2in 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 t1in r1out t2in r2out t1out (except MAX220) (except MAX220) r1in t2out r2in +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 = 0.1f 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 maxim integrated 17 MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers 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 t1out +5v +5v 0.1f +5v 3 28 27 4 25 24 23 26 5 6 7 22 gnd enr enr gnd 21 +5v +5v +5v t2out t3out t4out 5k 5k 5k 5k 5k 14 13 2 1 t5out t5out r1in r2in r3in r4in r5in t1in 11 12 18 17 16 15 10 9 8 19 20 t2in t3in t4in t5in ent r2out r3out r4out pins (enr, gnd, v cc , t5out) are internally connected. connect either or both externally. t5out is a single driver. r5out r1out v cc ent t3in t2in t1in enr enr t4in t5in r4out r5out r3in r3out r2out r1out 20 19 18 17 9 10 11 12 r5in r4in t3out t4out t2out t1out r1in r2in so max225 16 15 t5out max225 functional description 5 receivers 5 transmitters 2 control pins 1 receiver enable (enr) 1 transmitter enable (ent) t5out gnd gnd top view + figure 7. max225 pin configuration and typical operating circuit 18 maxim integrated MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers gnd 10 27 r3out 23 r4out r3in r4in 5k 5k 5 4 r2out r2in 5k rs-232 inputs logic outputs rs-232 outputs ttl/cmos inputs r2 8 9 r1out r1in 5k r1 r3 r4 19 18 r5out r5in 5k r5 2 7 t1in t1out +5v 400k +5v 6 3 t2in t2out t2 400k 20 t3out 1 t3in +5v t3 400k c1+ c1- 1.0f 12 v cc +5v input 11 17 1.0f 13 1.0f +5v to +10v voltage doubler 26 1.0f t1 28 21 t4in t4out +5v 400k t4 14 c2+ c2- 15 1.0f 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 t4out r3in r3out shdn (shdn) r4in* c2+ r4out* t4in t3in r5out* r5in* v- c2- c1- v+ c1+ v cc gnd r1in r1out t1in t2in r2out r2in t2out t1out t3out 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 maxim integrated 19 MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 t5in n.c. shdn t2in t2out t1out t5out t4in t3in v- c1+ v cc gnd t1in 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 t3in t4in t2in t5in t1out t2out +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 1.0f 1.0f 1.0f 1.0f 19 15 16 t3out t4out 18 x t1in t3out t4out t5out 17 1.0f 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 t2in t1in t1out t2out +5v input rs-232 inputs ttl/cmos outputs gnd 12 (14) 5k 5k +12v to -12v voltage converter 13 (15) 1.0f 1.0f c2 1.0f 400k +5v 400k +5v 6 9 10 r1in r2in r2out r1out 5 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 v+ v cc gnd t1out t2out v- c- c+ max231 r1in r1out t1in n.c. n.c. t2in r2out r2in 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 t1out t2out v- c- c+ max231 r1in r1out t1in t2in r2out r2in dip +7.5v to +12v (16) t1 t2 r1 r2 + + top view figure 10. max231 pin configurations and typical operating circuit 20 maxim integrated MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers 2 1 5 18 t2in t1in t1out t2out +5v input rs-232 inputs ttl/cmos outputs gnd gnd 69 400k +5v 400k +5v 5k 5k 7 20 3 4 r1in r2in r2out r1out 19 rs-232 outputs ttl/cmos inputs v cc pin names in ( ) are for so package. 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 r2in t2out v- r1in r1out t1in c2- c2+ v+ (c1-) c1- (c1+) (v+) c1+ v cc gnd t1out 12 11 9 10 v- (c2+) c2+ (c2-) (v-) cs- gnd dip/so max233 max233a t2in r2out c1+ c1- v- v- v+ c2+ c2- cs- c2+ 8 (13) 13 (14) 12 (10) 17 14 (8) 11 (12) 15 16 10 (11) do not make connections to these pins internal -10v power supply internal +10v power supply 1.0f 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 t3out t4out t4in t3in t1in t2in t2out t1out max234 v- c2- c2+ c1- v+ c1+ v cc gnd dip/so v+ v- 8 c1+ c1- 1.0f 1.0f 1.0f 7 9 10 11 4 3 13 14 12 1 2 16 15 t1in t3in t2in t4in t1out t3out t2out t4out +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 1.0f 1.0f t1 t2 t4 t3 + top view figure 12. max234 pin configuration and typical operating circuit maxim integrated 21 MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers 1.0f +5v input gnd 11 6 23 5 r2out rs-232 inputs ttl/cmos outputs 14 13 21 r5out 5k 17 18 r4out 5k 24 r3out 5k 24 23 22 21 20 19 18 17 1 2 3 4 5 6 7 8 r3in r3out t5in shdn t2out t1out t3out t4out en t5out r4in r4out t1in t2in r2out r2in 16 15 14 13 9 10 11 12 t4in t3in r5out r5in v cc gnd r1in r1out dip max235 5k 91 0 r1out r1in r2in r3in r4in r5in 5k 7 15 3 4 t2in t3out rs-232 outputs ttl/cmos inputs 22 19 t5in t5out +5v 16 1 t4in t4out +5v 2 t3in +5v +5v 8 t1in t1out +5v t2out 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 22 maxim integrated MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers gnd 8 23 r2out rs-232 inputs ttl/cmos outputs 17 16 21 r3out r2in r3in 5k 5k 5 4 r1out r1in 5k rs-232 outputs ttl/cmos inputs r1 r2 r3 2 7 t1in t1out +5v t1 400k 6 3 t2in +5v t2out t2 400k 18 t3out 1 t3in +5v t3 400k 19 24 t4in t4out +5v t4 400k shdn en 20 11 c1+ c1- 1.0f 10 12 13 14 15 +5v input c2+ c2- v cc +5v to +10v voltage doubler 9 1.0f 1.0f +10v to -10v voltage inverter 22 24 23 22 21 20 19 18 17 1 2 3 4 5 6 7 8 t4out r2in r2out shdn r1in t2out t1out t3out t4in t3in r3out gnd t1in t2in r1out 16 15 14 13 9 10 11 12 r3in v- c2- c2+ c1- v+ c1+ v cc dip/so max236 en 1.0f 1.0f top view v+ v- + figure 14. max236 pin configuration and typical operating circuit maxim integrated 23 MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers gnd 8 23 r2out rs-232 inputs ttl/cmos outputs 17 16 r3out r2in r3in 5k 5k 5 4 r1out r1in 5k rs-232 outputs ttl/cmos inputs r1 r2 r3 2 7 t1in t1out +5v t1 400k 6 3 t2in +5v t2out t2 400k 18 t3out 1 t3in +5v t3 400k 21 20 t5in t5out +5v t5 400k 11 c1+ c1- 1.0f 10 12 13 14 15 +5v input c2+ c2- v cc +5v to +10v voltage doubler 9 1.0f 1.0f +10v to -10v voltage inverter 22 24 23 22 21 20 19 18 17 1 2 3 4 5 6 7 8 t4out r2in r2out t5in r1in t2out t1out t3out t4in t3in r3out gnd t1in t2in r1out 16 15 14 13 9 10 11 12 r3in v- c2- c2+ c1- v+ c1+ v cc dip/so max237 t5out 1.0f 1.0f 19 24 t4in t4out +5v t4 400k v+ v- + top view figure 15. max237 pin configuration and typical operating circuit 24 maxim integrated MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers gnd 8 3 r2out 22 23 r3out r2in r3in 5k 5k 6 7 r1out r1in 5k rs-232 outputs ttl/cmos inputs rs-232 inputs ttl/cmos outputs r1 r2 r3 17 16 r4out r4in 5k r4 2 5 t1in t1out +5v 400k +5v 18 1 t2in t2out t2 400k 19 t3out 24 t3in +5v t3 400k 11 c1+ c1- 1.0f 10 12 13 14 15 +5v input c2+ c2- v cc +5v to +10v voltage doubler 9 1.0f 1.0f +10v to -10v voltage inverter 4 1.0f 1.0f 21 20 t4in t4out +5v t4 400k t1 24 23 22 21 20 19 18 17 1 2 3 4 5 6 7 8 t3out r3in r3out t4in r2out r2in t1out t2out top view t3in t2in r4out gnd r1in r1out t1in 16 15 14 13 9 10 11 12 r4in v- c2- c2+ c1- v+ c1+ v cc dip/so max238 t4out + v+ v- figure 16. max238 pin configuration and typical operating circuit maxim integrated 25 MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers gnd 3 18 r3out 12 r4out r3in r4in 5k 5k 22 21 r2out r2in 5k rs-232 outputs ttl/cmos inputs rs-232 inputs ttl/cmos outputs r2 1 2 r1out r1in 5k r1 r3 r4 10 9 r5out r5in 5k r5 19 24 t1in t1out +5v 400k +5v 23 20 t2in t2out t2 400k 16 t3out 13 t3in +5v t3 400k c1+ c1- 1.0f 6 v cc 8 +5v input 4 5 1.0f +10v to -10v voltage inverter 17 1.0f t1 24 23 22 21 20 19 18 17 1 2 3 4 5 6 7 8 t1in t2in r2out r2in v cc gnd r1in r1out t1out r3in r3out v- c- c+ v+ 16 15 14 13 9 10 11 12 t3in n.c. en t3out r4in r4out r5out r5in dip/so max239 t2out +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 26 maxim integrated MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers gnd 18 4 r3out 40 r4out r3in r4in 5k 5k 13 10 r2out r2in 5k rs-232 inputs ttl/cmos outputs rs-232 outputs ttl/cmos inputs r2 16 17 r1out r1in 5k r1 r3 r4 36 35 r5out r5in 5k r5 7 15 t1in t1out +5v 400k +5v 14 8 t2in t2out t2 400k 37 t3out 6 t3in +5v t3 400k c1+ c1- 1.0f 25 v cc +5v input 19 30 1.0f 26 1.0f +5v to +10v voltage doubler 3 1.0f t1 +5v 2 41 t5in t5out t5 400k 5 38 t4in t4out +5v 400k t4 27 c2+ c2- 28 1.0f 29 +5v to -10v voltage inverter v+ 39 en 42 43 plastic fp max240 shdn en t5out r4in r4out r5out r5in n.c. n.c. t3in t4in r2out t2in t1in r1out r1in n.c. n.c. n.c. n.c. v cc gnd r2in n.c. t4out t2out t1out t3out n.c. r3in r3out n.c. t5in 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 maxim integrated 27 MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers v+ v- 2 +10v c1+ c1- 1 3 4 5 11 10 12 9 6 14 7 13 8 t1in r1out t2in r2out t1out r1in t2out r2in +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 t1out r1in r1out t1in t2in r2out max243 dip/so v+ c1- v- c2+ c2- t2out r2in 0.1f 0.1f 0.1f 0.1f 0.1f receiver input -3v 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 28 maxim integrated MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers 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 1f 1f 1f 1f 1f 16 3 17 4 18 5k 5k 5k 5k 5k 5k 5k 5k 5k 5k c2- c2+ c1- c1+ ta2out ta2in ta3out ta3in ta4out ta4in 9 ra1in 10 ra1out 8 ra2in 11 ra2out 7 ra3in 12 ra3out 6 ra4in 13 ra4out 5 ra5in 14 19 ra5out 26 22 43 29 42 28 41 27 36 35 37 34 38 33 39 32 40 31 v- v+ tb2out tb2in 400k 2 15 ta1out ta1in 44 30 tb1out tb1in tb3out tb3in tb4out tb4in rb1in rb1out rb2in rb2out rb3in rb3out rb4in rb4out rb5in rb5out max249 functional description 10 receivers 5 a-side receivers 5 b-side receivers 8 transmitters 4 a-side transmitters 4 b-side transmitters no control pins 44123 44 0 4142 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 ta3in v cc ra5in max244 plcc top view ta4out ta3out ta2out ta1out tb1out tb2out tb3out tb4out rb5in gnd v+ c1+ c2+ c1- v- c2- tb3in tb4in rb3in rb2in rb1in rb1out rb2out rb3out rb4out rb5out tb1in tb2in ta2in ta1in ra5out ra4out ra3out ra2out ra1out ra1in ra2in 7 39 rb4in ra3in 6 18 ra4in ta4in +5v +5v +5v +5v + figure 20. max244 pin configuration and typical operating circuit maxim integrated 29 MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers 400k v cc 400k 400k gnd +5v +5v +5v +5v +5v 40 17 1f 3 18 4 19 5 5k 5k 5k 5k 5k 5k 5k 5k 5k 5k ta2out ta2in ta3out ta3in ta4out ta4in 1 11 ra1in 10 ra1out 12 ra2in 9 ra2out 13 ra3in 8 ra3out 14 ra4in 7 ra4out 15 ra5in 6 20 ra5out 23 37 22 36 21 35 29 30 28 31 27 32 26 33 25 34 tb2out tb2in tb3out tb3in tb4out tb4in rb1in rb1out rb2in rb2out rb3in rb3out rb4in rb4out rb5in rb5out +5v +5v 400k 16 2 ta1out ta1in 24 38 tb1out tb1in +5v +5v 40 v cc ent tb1in tb2in tb3in tb4in rb5out rb4out rb3out rb2out rb1out rb1in rb2in rb3in rb4in rb5in tb1out tb2out tb3out tb4out 39 38 37 36 35 34 33 32 31 1 2 3 4 5 6 7 8 9 10 enr ta1in ta2in ta3in ta4in ra5out ra4out ra3out ra2out ra1out ra1in ra2in ra3in ra4in ra5in ta1out ta2out ta3out ta4out 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 30 maxim integrated MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers 400k v cc 400k gnd +5v +5v +5v +5v +5v 40 16 1f 2 18 4 ta1out ta1in ta3out ta3in 20 24 38 22 36 1 39 tb1out tb1in tb3out tb3in 400k +5v 17 3 ta2out ta2in +5v 23 37 tb2out tb2in 400k +5v 19 5 ta4out ta4in +5v 21 35 tb4out tb4in 5k 5k 5k 5k 5k 5k 5k 5k 5k 5k 11 ra1in 10 ra1out 12 ra2in 9 ra2out 13 ra3in 8 ra3out 14 ra4in 7 ra4out 15 ra5in 6 ra5out 29 30 28 31 27 32 26 33 25 34 rb1in rb1out rb2in rb2out rb3in rb3out rb4in rb4out rb5in rb5out 40 v cc enb tb1in tb2in tb3in tb4in rb5out rb4out rb3out rb2out rb1out rb1in rb2in rb3in rb4in rb5in tb1out tb2out tb3out tb4out 39 38 37 36 35 34 33 32 31 1 2 3 4 5 6 7 8 9 10 ena ta1in ta2in ta3in ta4in ra5out ra4out ra3out ra2out ra1out ra1in ra2in ra3in ra4in ra5in ta1out ta2out ta3out ta4out 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 maxim integrated 31 MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers 400k v cc 400k gnd +5v +5v +5v +5v +5v 1 40 16 1f 2 18 4 5k 5k 5k 5k 5k 5k 5k 5k enta ta1out ta1in ta3out ta3in 6 rb5out 12 ra1in 10 ra1out 13 ra2in 9 ra2out 14 ra3in 8 ra3out 15 ra4in 7 20 ra4out 11 39 24 38 22 36 29 31 28 32 27 33 26 34 30 enra entb tb1out tb1in tb3out tb3in rb1in 5k 25 rb5in rb1out rb2in rb2out rb3in rb3out rb4in rb4out enrb 400k +5v 17 3 ta2out ta2in +5v 23 37 tb2out tb2in 400k +5v 19 5 ta4out ta4in +5v 21 35 tb4out tb4in 40 v cc entb tb1in tb2in tb3in tb4in rb4out rb3out rb2out rb1out rb1in rb2in rb3in rb4in rb5in tb1out tb2out tb3out tb4out 39 38 37 36 35 34 33 32 31 1 2 3 4 5 6 7 8 9 10 enta ta1in ta2in ta3in ta4in rb5out ra4out ra3out ra2out ra1out ra1in ra2in ra3in ra4in ta1out ta2out ta3out ta4out 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 receiver b-side (entb) + figure 23. max247 pin configuration and typical operating circuit 32 maxim integrated MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers 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 1f 1f 1f 1f 1f 14 3 16 5k 5k 5k 5k 5k 5k 5k 5k enta c2- c2+ c1- c1+ ta1out ta1in ta3out ta3in 8 ra1in 10 ra1out 7 ra2in 11 ra2out 6 ra3in 12 ra3out 5 ra4in 13 19 ra4out 9 27 26 22 44 31 42 29 37 35 38 34 39 33 40 32 36 enra entb v- v+ tb1out tb1in tb3out tb3in rb1in rb1out rb2in rb2out rb3in rb3out rb4in rb4out enrb 400k +5v 2 15 ta2out ta2in +5v 43 30 tb2out tb2in 400k +5v 4 17 ta4out ta4in +5v 41 28 tb4out tb4in 44123 44 0 4142 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 ta4in v cc ra4in max248 plcc top view ta4out ta3out ta2out ta1out tb1out tb2out tb3out ta4out rb4in gnd v+ c1+ c2+ c1- v- c2- tb4in entb rb2in rb1in rb1out rb2out rb3out rb4out tb1in tb2in tb3in ta3in ta2in ta1in ra4out ra3out ra2out ra1out enra ra1in 7 39 rb3in ra2in 6 18 ra3in 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 maxim integrated 33 MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers 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 1f 1f 1f 1f 15 2 16 3 17 5k 5k 5k 5k 5k 5k 5k 5k 5k 5k enta c2- c2+ c1- c1+ ta1out ta1in ta2out ta2in ta3out ta3in 8 ra1in 10 ra1out 7 ra2in 11 ra2out 6 ra3in 12 ra3out 5 ra4in 13 ra4out 4 ra5in 14 19 ra5out 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+ tb1out tb1in tb2out tb2in tb3out tb3in rb1in rb1out rb2in rb2out rb3in rb3out rb4in rb4out rb5in rb5out enrb 44123 44 0 4142 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 ra4in ra5in max249 plcc top view ta3out ta2out ta1out tb1out tb2out tb3out rb4in rb5in gnd v+ c1+ c2+ c1- v- c2- tb3in entb rb2in rb1in rb1out 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) rb2out rb3out rb4out rb5out tb1in tb2in ta3in ta2in ta1in ra4out ra5out ra3out ra2out ra1out enra ra1in 7 39 rb3in ra2in 6 18 ra3in enrb enta 1f + figure 25. max249 pin configuration and typical operating circuit 34 maxim integrated MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers ___________________________________________ordering information (continued) part max222cpn+ 0? to +70? temp range pin-package part temp range pin-package 18 plastic dip max222cwn+ 0? to +70? 18 wide so max222c/d 0? to +70? dice* max222epn+ -40? to +85? 18 plastic dip max222ewn+ -40? to +85? 18 wide so max222ejn -40? to +85? 18 cerdip max222mjn -55? to +125? 18 cerdip max223cai+ 0? to +70? 28 ssop max223cwi+ 0? to +70? 28 wide so max223c/d 0? to +70? dice* max223eai+ -40? to +85? 28 ssop max223ewi+ -40? to +85? 28 wide so max225cwi+ 0? to +70? 28 wide so max225ewi+ -40? to +85? 28 wide so max230cpp+ 0? to +70? 20 plastic dip max230cwp+ 0? to +70? 20 wide so max230c/d 0? to +70? dice* max230epp+ -40? to +85? 20 plastic dip max230ewp+ -40? to +85? 20 wide so max230ejp -40? to +85? 20 cerdip max230mjp -55? to +125? 20 cerdip max231cpd+ 0? to +70? 14 plastic dip max231cwe+ 0? to +70? 16 wide so max231cjd 0? to +70? 14 cerdip max231c/d 0? to +70? dice* max231epd+ -40? to +85? 14 plastic dip max231ewe+ -40? to +85? 16 wide so max231ejd -40? to +85? 14 cerdip max231mjd -55? to +125? 14 cerdip max232cpe+ 0? to +70? 16 plastic dip max232cse+ 0? to +70? 16 narrow so max232cwe+ 0? to +70? 16 wide so max232c/d 0? to +70? dice* max232epe+ -40? to +85? 16 plastic dip max232ese+ -40? to +85? 16 narrow so max232ewe+ -40? to +85? 16 wide so max232eje -40? to +85? 16 cerdip max232mje -55? to +125? 16 cerdip max232mlp+ -55? to +125? 20 lcc max232acpe+ 0? to +70? 16 plastic dip max232acse+ 0? to +70? 16 narrow so max232acwe+ 0? to +70? 16 wide so max232ac/d max232aepe+ -40? to +85? 16 plastic dip max232aese+ 0? to +70? dice* -40? to +85? 16 narrow so max232aewe+ -40? to +85? 16 wide so max232aeje -40? to +85? 16 cerdip max232amje -55? to +125? 16 cerdip max232amlp+ -55? to +125? 20 lcc max233cpp+ 0? to +70? 20 plastic dip max233epp+ -40? to +85? 20 plastic dip max233acpp+ 0? to +70? 20 plastic dip max233acwp+ 0? to +70? 20 wide so max233aepp+ -40? to +85? 20 plastic dip max233aewp+ -40? to +85? 20 wide so max234cpe+ 0? to +70? 16 plastic dip max234cwe+ 0? to +70? 16 wide so max234c/d 0? to +70? dice* max234epe+ -40? to +85? 16 plastic dip max234ewe+ -40? to +85? 16 wide so max234eje -40? to +85? 16 cerdip max234mje -55? to +125? 16 cerdip max235cpg+ 0? to +70? 24 wide plastic dip max235epg+ -40? to +85? 24 wide plastic dip max235edg -40? to +85? 24 ceramic sb max235mdg -55? to +125? 24 ceramic sb max236cng+ 0? to +70? 24 narrow plastic dip max236cwg+ 0? to +70? 24 wide so max236c/d 0? to +70? dice* max236eng+ -40? to +85? 24 narrow plastic dip max236ewg+ -40? to +85? 24 wide so max236erg -40? to +85? 24 narrow cerdip max236mrg -55? to +125? 24 narrow cerdip max237cng+ 0? to +70? 24 narrow plastic dip max237cwg+ 0? to +70? 24 wide so max237c/d 0? to +70? dice* max237eng+ -40? to +85? 24 narrow plastic dip max237ewg+ -40? to +85? 24 wide so max237erg -40? to +85? 24 narrow cerdip max237mrg -55? to +125? 24 narrow cerdip max238cng+ 0? to +70? 24 narrow plastic dip max238cwg+ 0? to +70? 24 wide so max238c/d 0? to +70? dice* + denotes a lead(pb)-free/rohs-compliant package. * contact factory for dice specifications. maxim integrated 35 MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers max238eng+ -40? to +85? 24 narrow plastic dip ___________________________________________ordering information (continued) 18 cerdip -55? to +125? max242mjn 18 cerdip -40? to +85? max242ejn 18 wide so -40? to +85? max242ewn+ 18 plastic dip -40? to +85? max242epn+ dice* 0? to +70? max242c/d 18 wide so 0? to +70? max242cwn+ 18 plastic dip 0? to +70? max242cpn+ 20 ssop 0? to +70? max242cap+ 28 wide so -40? to +85? max241ewi+ 28 ssop -40? to +85? max241eai+ dice* 0? to +70? max241c/d 28 wide so 0? to +70? max241cwi+ 28 ssop 0? to +70? max241cai+ dice* 0? to +70? max240c/d 44 plastic fp 0? to +70? max240cmh+ 24 narrow cerdip -55? to +125? max239mrg 24 narrow cerdip -40? to +85? max239erg 24 wide so -40? to +85? max239ewg+ 24 narrow plastic dip -40? to +85? max239eng+ dice* 0? to +70? max239c/d 24 wide so 0? to +70? max239cwg+ 24 narrow plastic dip 0? to +70? max239cng+ 24 narrow cerdip -55? to +125? 24 wide so pin-package temp range -40? to +85? max238mrg 24 narrow cerdip -40? to +85? max238erg max238ewg+ part pin-package temp range part 44 plcc -40? to +85? max249eqh+ 44 plcc 0? to +70? max249cqh+ 44 plcc -40? to +85? max248eqh+ dice* 0? to +70? max248c/d 44 plcc 0? to +70? max248cqh+ 40 plastic dip -40? to +85? max247epl+ dice* 0? to +70? max247c/d 40 plastic dip 0? to +70? max247cpl+ 40 plastic dip -40? to +85? max246epl+ dice* 0? to +70? max246c/d 40 plastic dip 0? to +70? max246cpl+ 40 plastic dip -40? to +85? max245epl+ dice* 0? to +70? max245c/d 40 plastic dip 0? to +70? max245cpl+ 44 plcc -40? to +85? max244eqh+ dice* 0? to +70? max244c/d 44 plcc 0? to +70? max244cqh+ 16 cerdip -55? to +125? max243mje 16 cerdip -40? to +85? max243eje 16 wide so -40? to +85? max243ewe+ 16 narrow so -40? to +85? max243ese+ 16 plastic dip -40? to +85? max243epe+ dice* 0? to +70? max243c/d 16 wide so 0? to +70? 16 plastic dip 0? to +70? max243cwe+ 16 narrow so 0? to +70? max243cse+ max243cpe+ + denotes a lead(pb)-free/rohs-compliant package. * contact factory for dice specifications. 36 maxim integrated MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers package information for the latest package outline information and land patterns, go to www.maxim-ic.com/packages . note that a ?? ?? or ??in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status. package type package code outline no. land pattern no. 14 pdip p14+3 21-0043 16 pdip p16+1 16 pdip p16+2 16 pdip p16+3 18 pdip p18+5 20 pdip p20+3 20 pdip p20m+1 24 pdip n24+3 24 pdip p24m+1 21-0044 28 pdip p28+2 40 pdip p40+1 40 pdip p40m+2 14 cerdip j14-3 21-0045 16 cerdip j16-3 18 cerdip j18-2 20 cerdip j20-2 24 cerdip r24-4 16 so(n) s16+3 21-0041 90-0097 16 so(n) s16+5 16 so(w) w16+1 21-0042 90-0107 16 so(w) w16+2 16 so(w) w16+3 18 so(w) w18+1 90-0181 20 so(w) w20+3 90-0108 20 so(w) w20m+1 24 so(w) w24+2 90-0182 28 so(w) w28+1 90-0109 28 so(w) w28+2 28 so(w) w28m+1 20 lcc l20+3 21-0658 90-0177 20 ssop a20+1 21-0056 90-0094 24 ssop a24+2 90-0110 28 ssop a28+1 90-0095 16 tssop u16+1 90-0117 16 fpck f16-3 21-0013 44 mqfp m44+5 21-0826 90-0169 44 plcc q44+1 21-0049 90-0236 44 plcc q44+2 maxim integrated 37 MAX220Cmax249 MAX220Cmax249 +5v-powered, multichannel rs-232 drivers/receivers revision history revision number revision date description pages changed 15 1/06 added part information to the lead temperature in the absolute maximum ratings sections 2, 5, 8 16 7/10 changed multiple packages to lead-free versions; updated/added notes 3, 4, 5, 7, and 8 to the electrical characteristics table; removed incorrect subscripting from all pin names in the electrical characteristics table and pin configurations 1, 2C9, 17C36 MAX220Cmax249 38 maxim integrated 160 rio robles, san jose, ca 95134 usa 1-408-601-1000 maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circuit patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. the parametric values (min and max limits) shown in the electrical characteristics table are guaranteed. other parametric values quoted in this data sheet are provided for guidance. ? 2010 maxim integrated the maxim logo and maxim integrated are trademarks of maxim integrated products, inc. 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