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general description the max13080e?ax13089e +5.0v, ?5kv esd-protect- ed, rs-485/rs-422 transceivers feature one driver and one receiver. these devices include fail-safe circuitry, guaranteeing a logic-high receiver output when receiver inputs are open or shorted. the receiver outputs a logic- high if all transmitters on a terminated bus are disabled (high impedance). the max13080e family include a hot- swap capability to eliminate false transitions on the bus during power-up or hot insertion. the max13080e/max13081e/max13082e feature reduced slew-rate drivers that minimize emi and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to 250kbps. the max13083e/max13084e also feature slew-rate-limited drivers but allow transmit speeds up to 500kbps. the max13086e/max13087e/ max13088e driver slew rates are not limited, making transmit speeds up to 16mbps possible. the max13089e slew rate is pin selectable for 250kbps, 500kbps, and 16mbps. the max13082e/max13088e are intended for half- duplex communications, and the max13080e/ max13081e/max13083e/max13084e/max13086e/ max13087e are intended for full-duplex communica- tions. the max13089e is selectable for half-duplex or full-duplex operation. it also features independently programmable receiver and transmitter output phase through separate pins. the max13080e family transceivers draw 1.2ma of supply current when unloaded or when fully loaded with the drivers disabled. all devices have a 1/8-unit load receiver input impedance, allowing up to 256 trans- ceivers on the bus. the max13080e/max13083e/max13086e/max13089e are available in 14-pin pdip and 14-pin so packages. the max13081e/max13082e/max13084e/max13087e/ max13088e are available in 8-pin pdip and 8-pin so packages. the devices operate over the commercial, extended, and automotive temperature ranges. applications utility meters lighting systems industrial control telecom security systems instrumentation profibus features +5.0v operation extended esd protection for rs-485/rs-422 i/o pins 15kv human body model true fail-safe receiver while maintaining eia/tia-485 compatibility hot-swap input structures on de and re enhanced slew-rate limiting facilitates error- free data transmission (max13080eCmax13084e/max13089e) low-current shutdown mode (except max13081e/max13084e/max13087e) pin-selectable full-/half-duplex operation (max13089e) phase controls to correct for twisted-pair reversal (max13089e) allow up to 256 transceivers on the bus available in industry-standard 8-pin so package max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers ________________________________________________________________ maxim integrated products 1 ordering information 19-3590; rev 2; 11/11 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. part temp range pin-package max13080e cpd+ 0 c to +70 c 14 pdip max13080ecsd+ 0 c to +70 c 14 so max13080eepd+ -40 c to +85 c 14 pdip max13080eesd+ -40 c to +85 c 14 so max13080eapd+ -40 c to +125 c 14 pdip max13080easd+ -40 c to +125 c 14 so selector guide, pin configurations, and typical operating circuits appear at end of data sheet. ordering information continued at end of data sheet. + denotes a lead(pb)-free/rohs-compliant package.
max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers 2 _______________________________________________________________________________________ absolute maximum ratings dc electrical characteristics (v cc = +5.0v ?0%, t a = t min to t max , unless otherwise noted. typical values are at v cc = +5.0v and t a = +25?.) (note 1) 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. (all voltages referenced to gnd) supply voltage (v cc ).............................................................+6v control input voltage ( re , de, slr, h/ f , txp, rxp)......................................................-0.3v to +6v driver input voltage (di)...........................................-0.3v to +6v driver output voltage (z, y, a, b) .............................-8v to +13v receiver input voltage (a, b)....................................-8v to +13v receiver input voltage full duplex (a, b) ..................................................-8v to +13v receiver output voltage (ro)....................-0.3v to (v cc + 0.3v) driver output current .....................................................?50ma continuous power dissipation (t a = +70?) 8-pin so (derate 5.88mw/? above +70?) .................471mw 8-pin plastic dip (derate 9.09mw/? above +70?) .....727mw 14-pin so (derate 8.33mw/? above +70?) ...............667mw 14-pin plastic dip (derate 10.0mw/? above +70?) ... 800mw operating temperature ranges max1308_ec_ _ .................................................0? to +75? max1308_ee_ _ ..............................................-40? to +85? max1308_ea_ _ ............................................-40? to +125? junction temperature ......................................................+150? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? soldering temperature (reflow) .......................................+260? parameter symbol conditions min typ max units driver v cc supply-voltage range v cc 4.5 5.5 v r l = 100 (rs-422), figure 1 3 v cc r l = 54 (rs-485), figure 1 2 v cc differential driver output v od no load v cc v change in magnitude of differential output voltage v od r l = 100 or 54 , figure 1 (note 2) 0.2 v driver common-mode output voltage v oc r l = 100 or 54 , figure 1 v cc / 2 3 v change in magnitude of common-mode voltage v oc r l = 100 or 54 , figure 1 (note 2) 0.2 v input-high voltage v ih de, di, re , txp, rxp, h/ f 3v input-low voltage v il de, di, re , txp, rxp, h/ f 0.8 v input hysteresis v hys de, di, re , txp, rxp, h/ f 100 mv input current i in1 de, di, re 1a input impedance first transition de 1 10 k input current i in2 txp, rxp, h/ f internal pulldown 10 40 ? srl input-high voltage v cc - 0.4 v srl input-middle voltage v cc x 0.3 v cc x 0.7 v srl input-low voltage 0.4 v srl = v cc 75 srl input current srl = gnd -75 ? v in = +12v 125 output leakage (y and z) full duplex i o de = gnd, v cc = gnd or v cc v in = -7v -100 ?
max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers _______________________________________________________________________________________ 3 dc electrical characteristics (continued) (v cc = +5.0v ?0%, t a = t min to t max , unless otherwise noted. typical values are at v cc = +5.0v and t a = +25?.) (note 1) parameter symbol conditions min typ max units 0 v out +12v (note 3) 40 250 -7v v out v cc (note 3) -250 -40 0 v out +12v, +85? t a +125? (note 3) 40 270 driver short-circuit output current i osd -7v v out v cc , +85? t a +125? (note 3) -270 -40 ma (v cc - 1v) v out +12v (note 3) 20 driver short-circuit foldback output current i osdf -7v v out +1v (note 3) -20 ma thermal-shutdown threshold t ts 175 c thermal-shutdown hysteresis t tsh 15 c v in = +12v 125 input current (a and b) i a, b de = gnd, v cc = gnd or v cc v in = -7v -100 ? receiver receiver differential threshold voltage v th -7v v cm +12v -200 -125 -50 mv receiver input hysteresis v th v a + v b = 0v 15 mv ro output-high voltage v oh i o = -1ma v cc - 0.6 v ro output-low voltage v ol i o = 1ma 0.4 v three-state output current at receiver i ozr 0 v o v cc 1a receiver input resistance r in -7v v cm +12v 96 k receiver output short-circuit current i osr 0v v ro v cc 110 ma supply current no load, re = 0, de = v cc 1.2 1.8 no load, re = v cc , de = v cc 1.2 1.8 supply current i cc no load, re = 0, de = 0 1.2 1.8 ma supply current in shutdown mode i shdn re = v cc , de = gnd 2.8 10 ? esd protection human body model ?5 kv esd protection for y, z, a, and b contact discharge iec 61000-4-2 ? kv
max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers 4 _______________________________________________________________________________________ driver switching characteristics max13080e/max13081e/max13082e/max13089e with srl = unconnected (250kbps) (v cc = +5.0v ?0%, t a = t min to t max , unless otherwise noted. typical values are at v cc = +5.0v and t a = +25?.) parameter symbol conditions min typ max units t dplh 350 1800 driver propagation delay t dphl c l = 50pf, r l = 54 , figures 2 and 3 350 1800 ns driver differential output rise or fall time t r , t f c l = 50pf, r l = 54 , figures 2 and 3 400 1900 ns differential driver output skew |t dplh - t dphl | t dskew c l = 50pf, r l = 54 , figures 2 and 3 250 ns maximum data rate 250 kbps driver enable to output high t dzh figure 4 2500 ns driver enable to output low t dzl figure 5 2500 ns driver disable time from low t dlz figure 5 100 ns driver disable time from high t dhz figure 4 100 ns driver enable from shutdown to output high t dzh ( shdn ) figure 4 5500 ns driver enable from shutdown to output low t dzl ( shdn ) figure 5 5500 ns time to shutdown t shdn 50 340 700 ns receiver switching characteristics max13080e/max13081e/max13082e/max13089e with srl = unconnected (250kbps) (v cc = +5.0v ?0%, t a = t min to t max , unless otherwise noted. typical values are at v cc = +5.0v and t a = +25?.) parameter symbol conditions min typ max units t rplh 200 receiver propagation delay t rphl c l = 15pf, figures 6 and 7 200 ns receiver output skew |t rplh - t rphl | t rskew c l = 15pf, figures 6 and 7 30 ns maximum data rate 250 kbps receiver enable to output low t rzl figure 8 50 ns receiver enable to output high t rzh figure 8 50 ns receiver disable time from low t rlz figure 8 50 ns receiver disable time from high t rhz figure 8 50 ns receiver enable from shutdown to output high t rzh ( shdn ) figure 8 5500 ns receiver enable from shutdown to output low t rzl ( shdn ) figure 8 5500 ns time to shutdown t shdn 50 340 700 ns
max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers _______________________________________________________________________________________ 5 driver switching characteristics max13083e/max13084e/max13089e with srl = v cc (500kbps) (v cc = +5.0v ?0%, t a = t min to t max , unless otherwise noted. typical values are at v cc = +5.0v and t a = +25?.) parameter symbol conditions min typ max units t dplh 200 1000 driver propagation delay t dphl c l = 50pf, r l = 54 , figures 2 and 3 200 1000 ns driver differential output rise or fall time t r , t f c l = 50pf, r l = 54 , figures 2 and 3 250 900 ns differential driver output skew |t dplh - t dphl | t dskew c l = 50pf, r l = 54 , figures 2 and 3 140 ns maximum data rate 500 kbps driver enable to output high t dzh figure 4 2500 ns driver enable to output low t dzl figure 5 2500 ns driver disable time from low t dlz figure 5 100 ns driver disable time from high t dhz figure 4 100 ns driver enable from shutdown to output high t dzh ( shdn ) figure 4 5500 ns driver enable from shutdown to output low t dzl ( shdn ) figure 5 5500 ns time to shutdown t shdn 50 340 700 ns receiver switching characteristics max13083e/max13084e/max13089e with srl = v cc (500kbps) (v cc = +5.0v ?0%, t a = t min to t max , unless otherwise noted. typical values are at v cc = +5.0v and t a = +25?.) parameter symbol conditions min typ max units t rplh 200 receiver propagation delay t rphl c l = 15pf, figures 6 and 7 200 ns receiver output skew |t rplh - t rphl | t rskew c l = 15pf, figures 6 and 7 30 ns maximum data rate 500 kbps receiver enable to output low t rzl figure 8 50 ns receiver enable to output high t rzh figure 8 50 ns receiver disable time from low t rlz figure 8 50 ns receiver disable time from high t rhz figure 8 50 ns receiver enable from shutdown to output high t rzh ( shdn ) figure 8 5500 ns receiver enable from shutdown to output low t rzl ( shdn ) figure 8 5500 ns time to shutdown t shdn 50 340 700 ns
max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers 6 _______________________________________________________________________________________ driver switching characteristics max13086e/max13087e/max13088e/max13089e with srl = gnd (16mbps) (v cc = +5.0v ?0%, t a = t min to t max , unless otherwise noted. typical values are at v cc = +5.0v and t a = +25?.) parameter symbol conditions min typ max units t dplh 50 driver propagation delay t dphl c l = 50pf, r l = 54 , figures 2 and 3 50 ns driver differential output rise or fall time t r , t f c l = 50pf, r l = 54 , figures 2 and 3 15 ns differential driver output skew |t dplh - t dphl | t dskew c l = 50pf, r l = 54 , figures 2 and 3 8 ns maximum data rate 16 mbps driver enable to output high t dzh figure 4 150 ns driver enable to output low t dzl figure 5 150 ns driver disable time from low t dlz figure 5 100 ns driver disable time from high t dhz figure 4 100 ns driver enable from shutdown to output high t dzh ( shdn ) figure 4 2200 ns driver enable from shutdown to output low t dzl ( shdn ) figure 5 2200 ns time to shutdown t shdn 50 340 700 ns receiver switching characteristics max13086e/max13087e/max13088e/max13089e with srl = gnd (16mbps) (v cc = +5.0v ?0%, t a = t min to t max , unless otherwise noted. typical values are at v cc = +5.0v and t a = +25?.) parameter symbol conditions min typ max units t rplh 50 80 receiver propagation delay t rphl c l = 15pf, figures 6 and 7 50 80 ns receiver output skew |t rplh - t rphl | t rskew c l = 15pf, figures 6 and 7 13 ns maximum data rate 16 mbps receiver enable to output low t rzl figure 8 50 ns receiver enable to output high t rzh figure 8 50 ns receiver disable time from low t rlz figure 8 50 ns receiver disable time from high t rhz figure 8 50 ns receiver enable from shutdown to output high t rzh ( shdn ) figure 8 2200 ns receiver enable from shutdown to output low t rzl ( shdn ) figure 8 2200 ns time to shutdown t shdn 50 340 700 ns note 1: all currents into the device are positive. all currents out of the device are negative. all voltages are referred to device gro und, unless otherwise noted. note 2: v od and v oc are the changes in v od and v oc , respectively, when the di input changes state. note 3: the short-circuit output current applies to peak current just prior to foldback current limiting. the short-circuit foldback ou tput current applies during current limiting to allow a recovery from bus contention.
max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers _______________________________________________________________________________________ 7 0.80 0.90 1.50 1.10 1.00 1.20 1.30 1.40 1.60 -40 -10 5 20 -25 35 50 95 80 110 65 125 supply current vs. temperature max13080e-89e toc01 temperature ( c) supply current (ma) no load de = v cc de = 0 0 20 10 40 30 50 60 02 1345 output current vs. receiver output-high voltage max13080e-89e toc02 output high voltage (v) output current (ma) 0 20 10 40 30 60 50 70 02 1345 output current vs. receiver output-low voltage max13080e-89e toc03 output low voltage (v) output current (ma) 4.0 4.4 4.2 4.8 4.6 5.2 5.0 5.4 receiver output-high voltage vs. temperature max13080e-89e toc04 temperature ( c) output high voltage (v) i o = -1ma -40 -10520 -25 35 50 95 80 110 65 125 0 0.1 0.7 0.3 0.2 0.4 0.5 0.6 0.8 receiver output-low voltage vs. temperature max13080e-89e toc05 temperature ( c) output low voltage (v) i o = 1ma -40 -10 5 20 -25 35 50 95 80 110 65 125 0 20 40 60 80 100 120 140 160 012345 driver differential output current vs. differential output voltage max13080e-89e toc06 differential output voltage (v) differential output current (ma) 2.0 2.8 2.4 3.6 3.2 4.4 4.0 4.8 driver differential output voltage vs. temperature max13080e-89e toc07 differential output voltage (v) r l = 54 -40 -10 5 20 -25 35 50 95 80 110 65 125 temperature ( c) 0 40 20 100 80 60 120 140 180 160 200 -7 -5 -4 -6 -3 -2 -1 0 1 2 3 5 4 output current vs. transmitter output-high voltage max13080e-89e toc08 output high voltage (v) output current (ma) 0 60 40 20 80 100 120 140 160 180 200 04 2681012 output current vs. transmitter output-low voltage max13080e-89e toc09 output-low voltage (v) output current (ma) typical operating characteristics (v cc = +5.0v, t a = +25?, unless otherwise noted.)
max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers 8 _______________________________________________________________________________________ 0 2 1 5 4 3 6 7 9 8 10 shutdown current vs. temperature max13080e-89e toc10 shutdown current ( a) -40 -10 5 20 -25 35 50 95 80 110 65 125 temperature ( c) 600 800 700 1000 900 1100 1200 driver propagation delay vs. temperature (250kbps) max13080e-89e toc11 driver propagation delay (ns) t dphl t dplh -40 -10 5 20 -25 35 50 95 80 110 65 125 temperature ( c) 300 400 350 500 450 550 600 driver propagation delay vs. temperature (500kbps) max13080e-89e toc12 driver propagation delay (ns) t dphl t dplh -40 -10 5 20 -25 35 50 95 80 110 65 125 temperature ( c) 0 10 70 30 20 40 50 60 80 driver propagation delay vs. temperature (16mbps) max13080e-89e toc13 driver propagation delay (ns) -40 -10 5 20 -25 35 50 95 80 110 65 125 temperature ( c) t dphl t dplh 0 40 20 100 80 60 120 140 160 180 receiver propagation delay vs. temperature (250kpbs and 500kbps) max13080e-89e toc14 receiver propagation delay (ns) -40 -10 5 20 -25 35 50 95 80 110 65 125 temperature ( c) t dphl t dplh 0 40 20 100 80 60 120 140 160 180 receiver propagation delay vs. temperature (16mbps) max13080e-89e toc15 receiver propagation delay (ns) -40 -10 5 20 -25 35 50 95 80 110 65 125 temperature ( c) t dphl t dplh 2 s/div driver propagation delay (250kbps) di 2v/div v y - v z 5v/div max13080e-89e toc16 r l = 100 200ns/div receiver propagation delay (250kbps and 500kbps) v a - v b 5v/div ro 2v/div max13080e-89e toc17 r l = 100 typical operating characteristics (continued) (v cc = +5.0v, t a = +25?, unless otherwise noted.)
max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers _______________________________________________________________________________________ 9 test circuits and waveforms 400ns/div driver propagation delay (500kbps) di 2v/div max13080e-89e toc18 r l = 100 v y - v z 5v/div 10ns/div driver propagation delay (16mbps) di 2v/div max13080e-89e toc19 r l = 100 v y 2v/div v z 2v/div 40ns/div receiver propagation delay (16mbps) v b 2v/div max13080e-89e toc20 r l = 100 ro 2v/div v a 2v/div typical operating characteristics (continued) (v cc = +5.0v, t a = +25?, unless otherwise noted.) y z v od v oc r l /2 r l /2 figure 1. driver dc test load di de v cc z y v od r l c l figure 2. driver timing test circuit di v cc 0 z y v o 0 -v o v o v cc /2 t dplh t dphl 1/2 v o 10% t r 90% 90% 1/2 v o 10% t f v diff = v (y) - v (z) v diff t skew = | t dplh - t dphl | figure 3. driver propagation delays
max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers 10 ______________________________________________________________________________________ test circuits and waveforms (continued) de out t dhz 0 v cc v cc / 2 0.25v 0 v oh generator 0 or v cc s1 50 d out t dzh , t dzh(shdn) v om = (0 + v oh ) / 2 r l = 500 c l 50pf figure 4. driver enable and disable times (t dhz , t dzh , t dzh(shdn) ) de v cc out t dlz 0 v cc v cc / 2 generator 0 or v cc s1 50 d out t dzl , t dzl(shdn) v om = (v ol + v cc ) / 2 r l = 500 c l 50pf v ol 0.25v v cc figure 5. driver enable and disable times (t dzl , t dlz , t dlz(shdn) )
max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers ______________________________________________________________________________________ 11 test circuits and waveforms (continued) v id r b a receiver output ate figure 6. receiver propagation delay test circuit a b ro v oh v cc /2 t rplh t rphl v ol +1v -1v the rise time and fall time of inputs a and b < 4ns figure 7. receiver propagation delays s1 open s2 closed s3 = +1.5v ro v cc 0 0 v oh v oh / 2 s1 open s2 closed s3 = +1.5v t rhz v cc 0 0 v oh 0.25v v cc /2 s1 closed s2 open s3 = -1.5v v cc 0 v ol v cc v cc /2 s1 closed s2 open s3 = -1.5v t rlz v cc 0 v ol v cc 0.25v generator v cc +1.5v 1k c l 15pf s2 s1 50 s3 -1.5v r v id re ro re ro re ro re t rzh , t rzh(shdn) t rzl , t rzl(shdn) (v ol + v cc ) / 2 v cc /2 figure 8. receiver enable and disable times
max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers 12 ______________________________________________________________________________________ pin description pin max13080e max13083e max13086e max13081e max13084e max13087e max13082e max13088e max13089e full-duplex devices half- duplex devices full- duplex mode half- duplex mode name function 1, 8, 13 n.c. no connect. not internally connected, can be connected to gnd. 11h/ f half-/full-duplex select input. connect h/ f to v cc for half-duplex mode; connect h/ f to gnd or leave unconnected for full-duplex mode. 22122ro receiver output. when re is low and if (a - b) -50mv, ro is high; if (a - b) -200mv, ro is low. 3?33 re receiver output enable. drive re low to enable ro; ro is high impedance when re is high. drive re high and de low to enter low-power shutdown mode. re is a hot-swap input (see the hot-swap capability section for details). 4?44de driver output enable. drive de high to enable driver outputs. these outputs are high impedance when de is low. drive re high and de low to enter low-power shutdown mode. de is a hot-swap input (see the hot- swap capability section for details). 53455di d r i ver inp ut. w i th d e hi g h, a l ow on d i for ces noni nver ti ng outp ut l ow and i nver ti ng outp ut hi g h. s i m i l ar l y, a hi g h on d i for ces noni nver ti ng outp ut hi g h and i nver ti ng outp ut l ow . 6 6 srl slew-rate limit selector input. connect srl to ground for 16mbps communication rate; connect srl to v cc for 500kbps communication rate. leave srl unconnected for 250kbps communication rate. 6, 7 4 5 7 7 gnd ground 8 8 txp tr ansm i tter p hase. c onnect tx p to g r ound or l eave tx p unconnected for nor m al tr ansm i tter p hase/p ol ar i ty. c onnect tx p to v c c to i nver t the tr ansm i tter p hase/p ol ar i ty. 9 5 9 y noninverting driver output 9y noninverting driver output and noninverting receiver input* 10 6 10 z inverting driver output 10 z inverting driver output and inverting receiver input* 11 7 11 b inverting receiver input 11 b receiver input resistors* 7 b inverting receiver input and inverting driver output
max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers ______________________________________________________________________________________ 13 max13080e/max13083e/max13086e pin description (continued) pin max13080e max13083e max13086e max13081e max13084e max13087e max13082e max13088e max13089e full-duplex devices half- duplex devices full- duplex mode half- duplex mode name function 12 8 12 a noninverting receiver input 12 a receiver input resistors* 6a noninverting receiver input and noninverting driver output 13 13 rxp receiver phase. connect rxp to gnd or leave rxp unconnected for normal transmitter phase/polarity. connect rxp to v cc to invert receiver phase/polarity. 14 1 8 14 14 v cc positive supply v cc = +5.0v ?0%. bypass v cc to gnd with a 0.1? capacitor. * max13089e only. in half-duplex mode, the driver outputs serve as receiver inputs. the full-duplex receiver inputs (a and b) sti ll have a 1/8-unit load (96k ), but are not connected to the receiver. transmitting inputs outputs re de di z y x1101 x1010 0 0 x high-z high-z 1 0 x shutdown receiving inputs output re de a, b ro 0x -50mv 1 0x -200mv 0 0x open/ shorted 1 1 1 x high-z 1 0 x shutdown max13081e/max13084e/max13086e/ max13087e transmitting input outputs di z y 101 010 receiving inputs output a, b ro -50mv 1 -200mv 0 open/shorted 1 function tables
max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers 14 ______________________________________________________________________________________ max13082e/max13088e transmitting inputs outputs re de di b/z a/y x1101 x1010 0 0 x high-z high-z 1 0 x shutdown function tables (continued) max13089e transmitting inputs outputs txp re de di z y 0x1101 0x1010 1x1110 1x1001 x 0 0 x high-z high-z x 1 0 x shutdown receiving inputs outputs h/ f rxp re de a, b y, z ro 0 0 0 x > -50mv x 1 0 0 0 x < -200mv x 0 0 1 0 x > -50mv x 0 0 1 0 x < -200mv x 1 1000x> -50mv 1 1000x< -200mv 0 1100x> -50mv 0 1100x< -200mv 1 0 0 0 x open/shorted x 1 1000x open/shorted 1 0 1 0 x open/shorted x 0 1100x open/shorted 0 x x 1 1 x x high-z x x 1 0 x x shutdown receiving inputs outputs re de a-b ro 0x -50mv 1 0x -200mv 0 0x open/ shorted 1 1 1 x high-z 1 0 x shutdown x = don? care; shutdown mode, driver, and receiver outputs are high impedance.
detailed description the max13080e?ax13089e high-speed transceivers for rs-485/rs-422 communication contain one driver and one receiver. these devices feature fail-safe circuit- ry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted, or when they are connected to a terminated transmission line with all drivers disabled (see the fail-safe section). the max13080e/max13082e/max13083e/max13086e/ max13088e/max13089e also feature a hot-swap capa- bility allowing line insertion without erroneous data trans- fer (see the hot swap capability section). the max13080e/max13081e/max13082e feature reduced slew-rate drivers that minimize emi and reduce reflec- tions caused by improperly terminated cables, allowing error-free data transmission up to 250kbps. the max13083e/max13084e also offer slew-rate limits allowing transmit speeds up to 500kbps. the max13086e/max13087e/max13088es?driver slew rates are not limited, making transmit speeds up to 16mbps possible. the max13089e? slew rate is selec- table between 250kbps, 500kbps, and 16mbps by dri- ving a selector pin with a three-state driver. the max13082e/max13088e are half-duplex transceivers, while the max13080e/max13081e/ max13083e/ max13084e/max13086e/max13087e are full-duplex transceivers. the max13089e is selectable between half- and full-duplex communication by driving a selec- tor pin (h/ f ) high or low, respectively. all devices operate from a single +5.0v supply. drivers are output short-circuit current limited. thermal-shutdown circuitry protects drivers against excessive power dissi- pation. when activated, the thermal-shutdown circuitry places the driver outputs into a high-impedance state. receiver input filtering the receivers of the max13080e?ax13084e, and the max13089e when operating in 250kbps or 500kbps mode, incorporate input filtering in addition to input hysteresis. this filtering enhances noise immunity with differential signals that have very slow rise and fall times. receiver propagation delay increases by 25% due to this filtering. fail-safe the max13080e family guarantees a logic-high receiver output when the receiver inputs are shorted or open, or when they are connected to a terminated transmission line with all drivers disabled. this is done by setting the receiver input threshold between -50mv and -200mv. if the differential receiver input voltage (a - b) is greater than or equal to -50mv, ro is logic-high. if (a - b) is less than or equal to -200mv, ro is logic-low. in the case of a terminated bus with all transmitters disabled, the receiv- er? differential input voltage is pulled to 0v by the termi- nation. with the receiver thresholds of the max13080e family, this results in a logic-high with a 50mv minimum noise margin. unlike previous fail-safe devices, the -50mv to -200mv threshold complies with the ?00mv eia/tia-485 standard. hot-swap capability (except max13081e/max13084e/max13087e) hot-swap inputs when circuit boards are inserted into a hot or powered backplane, differential disturbances to the data bus can lead to data errors. upon initial circuit board inser- tion, the data communication processor undergoes its own power-up sequence. during this period, the processor? logic-output drivers are high impedance and are unable to drive the de and re inputs of these devices to a defined logic level. leakage currents up to ?0? from the high-impedance state of the proces- sor? logic drivers could cause standard cmos enable inputs of a transceiver to drift to an incorrect logic level. additionally, parasitic circuit board capacitance could cause coupling of v cc or gnd to the enable inputs. without the hot-swap capability, these factors could improperly enable the transceiver? driver or receiver. when v cc rises, an internal pulldown circuit holds de low and re high. after the initial power-up sequence, the pulldown circuit becomes transparent, resetting the hot-swap tolerable input. hot-swap input circuitry the enable inputs feature hot-swap capability. at the input there are two nmos devices, m1 and m2 (figure 9). when v cc ramps from zero, an internal 7? timer turns on m2 and sets the sr latch, which also turns on m1. transistors m2, a 500? current sink, and m1, a 100? current sink, pull de to gnd through a 5k resistor. m2 is designed to pull de to the disabled state against an external parasitic capacitance up to 100pf that can drive de high. after 7?, the timer deactivates m2 while m1 remains on, holding de low against three-state leakages that can drive de high. m1 remains on until an external source overcomes the required input current. at this time, the sr latch resets and m1 turns off. when m1 turns off, de reverts to a standard, high-impedance cmos input. whenever v cc drops below 1v, the hot-swap input is reset. for re there is a complementary circuit employing two pmos devices pulling re to v cc . max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers ______________________________________________________________________________________ 15
max13080e?ax13084e/max13086e?ax13089e max13089e programming the max13089e has several programmable operating modes. transmitter rise and fall times are programma- ble, resulting in maximum data rates of 250kbps, 500kbps, and 16mbps. to select the desired data rate, drive srl to one of three possible states by using a three-state driver: v cc , gnd, or unconnected. for 250kbps operation, set the three-state device in high- impedance mode or leave srl unconnected. for 500kbps operation, drive srl high or connect it to v cc . for 16mbps operation, drive srl low or connect it to gnd. srl can be changed during operation without interrupting data communications. occasionally, twisted-pair lines are connected backward from normal orientation. the max13089e has two pins that invert the phase of the driver and the receiver to cor- rect this problem. for normal operation, drive txp and rxp low, connect them to ground, or leave them uncon- nected (internal pulldown). to invert the driver phase, drive txp high or connect it to v cc . to invert the receiver phase, drive rxp high or connect it to v cc . note that the receiver threshold is positive when rxp is high. the max13089e can operate in full- or half-duplex mode. drive h/ f low, leave it unconnected (internal pulldown), or connect it to gnd for full-duplex opera- tion. drive h/ f high for half-duplex operation. in full- duplex mode, the pin configuration of the driver and receiver is the same as that of a max13080e. in half- duplex mode, the receiver inputs are internally connect- ed to the driver outputs through a resistor-divider. this effectively changes the function of the device? outputs. y becomes the noninverting driver output and receiver input, z becomes the inverting driver output and receiver input. in half-duplex mode, a and b are still connected to ground through an internal resistor-divider but they are not internally connected to the receiver. ?5kv esd protection as with all maxim devices, esd-protection structures are incorporated on all pins to protect against electro- static discharges encountered during handling and assembly. the driver outputs and receiver inputs of the max13080e family of devices have extra protection against static electricity. maxim? engineers have devel- oped state-of-the-art structures to protect these pins against esd of ?5kv without damage. the esd struc- tures withstand high esd in all states: normal operation, shutdown, and powered down. after an esd event, the max13080e family keep working without latchup or damage. esd protection can be tested in various ways. the transmitter outputs and receiver inputs of the max13080e family are characterized for protection to the following limits: ? ?5kv using the human body model ? ?kv using the contact discharge method specified in iec 61000-4-2 esd test conditions esd performance depends on a variety of conditions. contact maxim for a reliability report that documents test setup, test methodology, and test results. human body model figure 10a shows the human body model, and figure 10b shows the current waveform it generates when dis- charged into a low impedance. this model consists of a 100pf capacitor charged to the esd voltage of interest, which is then discharged into the test device through a 1.5k resistor. iec 61000-4-2 the iec 61000-4-2 standard covers esd testing and performance of finished equipment. however, it does not specifically refer to integrated circuits. the max13080e family of devices helps you design equip- ment to meet iec 61000-4-2, without the need for addi- tional esd-protection components. +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers 16 ______________________________________________________________________________________ de de (hot swap) 5k timer timer v cc 10 s m2 m1 500 a 100 a sr latch figure 9. simplified structure of the driver enable pin (de)
the major difference between tests done using the human body model and iec 61000-4-2 is higher peak current in iec 61000-4-2 because series resistance is lower in the iec 61000-4-2 model. hence, the esd with- stand voltage measured to iec 61000-4-2 is generally lower than that measured using the human body model. figure 10c shows the iec 61000-4-2 model, and figure 10d shows the current waveform for iec 61000-4-2 esd contact discharge test. machine model the machine model for esd tests all pins using a 200pf storage capacitor and zero discharge resis- tance. the objective is to emulate the stress caused when i/o pins are contacted by handling equipment during test and assembly. of course, all pins require this protection, not just rs-485 inputs and outputs. applications information 256 transceivers on the bus the standard rs-485 receiver input impedance is 12k (1-unit load), and the standard driver can drive up to 32- unit loads. the max13080e family of transceivers has a 1/8-unit load receiver input impedance (96k ), allowing up to 256 transceivers to be connected in parallel on one communication line. any combination of these devices, as well as other rs-485 transceivers with a total of 32- unit loads or fewer, can be connected to the line. reduced emi and reflections the max13080e/max13081e/max13082e feature reduced slew-rate drivers that minimize emi and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to 250kbps. the max13083e/max13084e offer higher dri- ver output slew-rate limits, allowing transmit speeds up to 500kbps. the max13089e with srl = v cc or uncon- nected are slew-rate limited. with srl unconnected, the max13089e error-free data transmission is up to 250kbps. with srl connected to v cc , the data transmit speeds up to 500kbps. max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers ______________________________________________________________________________________ 17 charge-current- limit resistor discharge resistance storage capacitor c s 100pf r c 1m r d 1500 high- voltage dc source device under test figure 10a. human body esd test model i p 100% 90% 36.8% t rl time t dl current waveform peak-to-peak ringing (not drawn to scale) i r 10% 0 0 amps figure 10b. human body current waveform charge-current- limit resistor discharge resistance storage capacitor c s 150pf r c 50m to 100m r d 330 high- voltage dc source device under test figure 10c. iec 61000-4-2 esd test model t r = 0.7ns to 1ns 30ns 60ns t 100% 90% 10% i peak i figure 10d. iec 61000-4-2 esd generator current waveform
max13080e?ax13084e/max13086e?ax13089e low-power shutdown mode (except max13081e/max13084e/max13087e) low-power shutdown mode is initiated by bringing both re high and de low. in shutdown, the devices typically draw only 2.8? of supply current. re and de can be driven simultaneously; the devices are guaranteed not to enter shutdown if re is high and de is low for less than 50ns. if the inputs are in this state for at least 700ns, the devices are guaranteed to enter shutdown. enable times t zh and t zl (see the switching characteristics section) assume the devices were not in a low-power shutdown state. enable times t zh(shdn) and t zl(shdn) assume the devices were in shutdown state. it takes drivers and receivers longer to become enabled from low-power shutdown mode (t zh(shdn) , t zl(shdn) ) than from driver/receiver-disable mode (t zh , t zl ). driver output protection two mechanisms prevent excessive output current and power dissipation caused by faults or by bus contention. the first, a foldback current limit on the output stage, provides immediate protection against short circuits over the whole common-mode voltage range (see the typical operating characteristics ). the second, a thermal-shut- down circuit, forces the driver outputs into a high-imped- ance state if the die temperature exceeds +175? (typ). line length the rs-485/rs-422 standard covers line lengths up to 4000ft. for line lengths greater than 4000ft, use the repeater application shown in figure 11. typical applications the max13082e/max13088e/max13089e transceivers are designed for bidirectional data communications on multipoint bus transmission lines. figures 12 and 13 show typical network applications circuits. to minimize reflections, terminate the line at both ends in its characteristic impedance, and keep stub lengths off the main line as short as possible. the slew-rate-lim- ited max13082e and the two modes of the max13089e are more tolerant of imperfect termination. chip information process: bicmos +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers 18 ______________________________________________________________________________________ ro di de r d max13080e/max13081e/max13083e/ max13084e/max13086e/max13087e/ max13089e (full duplex) re 120 120 a b z y data in data out figure 11. line repeater for max13080e/max13081e/ max13083e/max13084e/max13086e/max13087e/max13089e in full-duplex mode di ro de a b re ro ro ro di di di de de de d d d r r r bb b a a a 120 120 d r max13082e max13088e max13089e (half duplex) re re re figure 12. typical half-duplex rs-485 network
max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers ______________________________________________________________________________________ 19 ro di de r 120 120 d max13080e max13081e max13083e max13084e max13086e max13087e max31089e (full duplex) re ro di de r d re 120 120 a b z y a b z y ro di de r d re yzba ro di de r d re yzba note: re and de on max13080e/max13083e/max13086e/max13089e only. figure 13. typical full-duplex rs-485 network selector guide part half/full duplex data rate (mbps) slew-rate limited low-power shutdown receiver/ driver enable transceivers on bus pins max13080e full 0.250 yes yes yes 256 14 max13081e full 0.250 yes no no 256 8 max13082e half 0.250 yes yes yes 256 8 max13083e full 0.5 yes yes yes 256 14 max13084e full 0.5 yes no no 256 8 max13086e full 16 no yes yes 256 14 max13087e full 16 no no no 256 8 max13088e half 16 no yes yes 256 8 max13089e selectable selectable selectable yes yes 256 14
max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers 20 ______________________________________________________________________________________ max13080e max13083e max13086e rt rt de v cc re gnd v cc re gnd de ro di 9 10 12 11 b a z y 0.1 f 5 ro n.c. di 2 1, 8, 13 3 6, 7 14 4 v cc n.c. n.c. a b z y n.c. ro re de di gnd gnd d d r d r typical full-duplex operating circuit 14 13 12 11 10 9 8 1 2 3 4 5 6 7 dip/so r y z a b pin configurations and typical operating circuits max13081e max13084e max13087e rt rt v cc gnd v cc gnd ro di 5 6 8 7 b a z y 0.1 f 3 ro di 2 4 1 r d d r d r typical full-duplex operating circuit v cc ro di gnd a b z y 8 7 6 5 1 2 3 4 dip/so y z a b max13082e max13088e rt rt de re a b a b 0.1 f typical half-duplex operating circuit note: pin labels y and z on timing, test, and waveforms diagrams. see pins a and b when de is high. r d ro di v cc b a gnd 8 7 6 5 1 2 3 4 dip/so re de r d ro di v cc gnd 8 7 6 5 1 2 3 4 re de d r di ro
max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers ______________________________________________________________________________________ 21 14 13 12 11 10 9 8 1 2 3 4 5 6 7 max13089e max13089e dip/so top view v cc v cc rxp txp a b z y ro de di srl gnd re h/f ro txp a b z y gnd de srl di h/f rxp note: switch positions indicated for h/f = gnd. re pin configurations and typical operating circuits (continued)
max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers 22 ______________________________________________________________________________________ ordering information (continued) part temp range pin-package max13081e cpa+ 0 c to +70 c 8 pdip max13081ecsa+ 0 c to +70 c 8 so max13081eepa+ -40 c to +85 c 8 pdip max13081eesa+ -40 c to +85 c 8 so max13081eapa+ -40 c to +125 c 8 pdip max13081easa+ -40 c to +125 c 8 so max13082e cpa+ 0 c to +70 c 8 pdip max13082ecsa+ 0 c to +70 c 8 so max13082eepa+ -40 c to +85 c 8 pdip max13082eesa+ -40 c to +85 c 8 so max13082eapa+ -40 c to +125 c 8 pdip max13082easa+ -40 c to +125 c 8 so max13083e cpd+ 0 c to +70 c 14 pdip max13083ecsd+ 0 c to +70 c 14 so max13083eepd+ -40 c to +85 c 14 pdip max13083eesd+ -40 c to +85 c 14 so max13083eapd+ -40 c to +125 c 14 pdip max13083easd+ -40 c to +125 c 14 so max13084e cpa+ 0 c to +70 c 8 pdip max13084ecsa+ 0 c to +70 c 8 so max13084eepa+ -40 c to +85 c 8 pdip max13084eesa+ -40 c to +85 c 8 so max13084eapa+ -40 c to +125 c 8 pdip max13084easa+ -40 c to +125 c 8 so part temp range pin-package max13086e cpd+ 0 c to +70 c 14 pdip max13086ecsd+ 0 c to +70 c 14 so max13086eepd+ -40 c to +85 c 14 pdip max13086eesd+ -40 c to +85 c 14 so max13086eapd+ -40 c to +125 c 14 pdip max13086easd+ -40 c to +125 c 14 so max13087e cpa+ 0 c to +70 c 8 pdip max13087ecsa+ 0 c to +70 c 8 so max13087eepa+ -40 c to +85 c 8 pdip max13087eesa+ -40 c to +85 c 8 so max13087eapa+ -40 c to +125 c 8 pdip max13087easa+ -40 c to +125 c 8 so max13088e cpa+ 0 c to +70 c 8 pdip max13088ecsa+ 0 c to +70 c 8 so max13088eepa+ -40 c to +85 c 8 pdip max13088eesa+ -40 c to +85 c 8 so max13088eapa+ -40 c to +125 c 8 pdip max13088easa+ -40 c to +125 c 8 so max13089e cpd+ 0 c to +70 c 14 pdip max13089ecsd+ 0 c to +70 c 14 so max13089eepd+ -40 c to +85 c 14 pdip max13089eesd+ -40 c to +85 c 14 so max13089eapd+ -40 c to +125 c 14 pdip max13089easd+ -40 c to +125 c 14 so + denotes a lead(pb)-free/rohs-compliant package.
max13080e?ax13084e/max13086e?ax13089e package information for the latest package outline information and land patterns (footprints), 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 per - tains to the package regardless of rohs status. +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers ______________________________________________________________________________________ 23 package type package code outline no. land pattern no. 8 pdip p8+2 21-0043 8 so s8+4 21-0041 90-0096 14 pdip p14+3 21-0043 14 so s14+1 21-0041 90-0112
max13080e?ax13084e/max13086e?ax13089e +5.0v, ?5kv esd-protected, fail-safe, hot-swap, rs-485/rs-422 transceivers 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. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ____________________ 24 2011 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. revision history revision number revision date description pages changed 2 11/11 deleted all reference to the max13085e 1, 2, 3, 5, 12. 13, 14, 15, 16, 17, 18, 19, 20, 22

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