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general description the max3160e/max3161e/max3162e are programma- ble rs-232/rs-485/rs-422 multiprotocol transceivers. the max3160e/max3161e are pin programmable as a 2tx/2rx rs-232 interface or a single rs-485/rs-422 transceiver. the max3162e is configured as a 2tx/2rx rs-232 interface, and a single rs-485/rs-422 trans- ceiver simultaneously. the max3160e/max3161e/max3162e feature enhanced electrostatic discharge (esd) protection. all of the trans- mitter outputs and receiver inputs are protected to ?5kv using the human body model. all devices incorporate a proprietary low-dropout trans- mitter output stage, and an on-board dual charge pump to allow rs-232- and rs-485-/rs-422-compliant perfor- mance from a +3v to +5.5v supply. the receivers feature true fail-safe circuitry that guarantees a logic-high receiv- er output when the receiver inputs are open or shorted. these devices also feature pin-selectable transmitter slew rates for rs-232 and rs-485/rs-422 modes. slew- rate limiting minimizes emi and reduces reflections caused by improperly terminated cables, allowing error- free data transmission up to 250kbps. disabling slew-rate limiting allows these devices to transmit at data rates up to 10mbps in rs-485/rs-422 mode and up to 1mbps in rs-232 mode. the max3160e/max3161e/max3162e feature a 10na shutdown mode, short-circuit limiting, and thermal shutdown circuitry to protect against excessive power dissipation. the max3160e/max3162e offer a flow-through pin- out that facilitates board layout. the max3160e/ max3161e/max3162e are available in tiny ssop pack- ages and operate over the commercial and extended temperature ranges. ________________________applications point-of-sales equipment peripherals industrial controls networking rs-232 to rs-485 security systems interface converters features ? single supply operation from +3v to +5.5v ? esd protection 15kv human body model ? pin-selectable as 2tx/2rx rs-232 or single rs-485/rs-422 (max3160e/max3161e) ? 2tx/2rx rs-232 and single rs-485/rs-422 (max3162e) ? pin-selectable rs-232/rs-485 transmitter slew rates reduce emi ? 10mbps rs-485 and 1mbps rs-232 data rates ? pin-selectable half-duplex or full-duplex rs-485/rs-422 operation (max3160e/max3161e) ? rs-485/rs-422 true fail-safe receivers ? 10na shutdown supply current ? 1/8-unit load allows up to 256 transceivers on the bus max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers ________________________________________________________________ maxim integrated products 1 19-3580; rev 0; 2/05 t ypical operating circuit pin configurations appear at end of data sheet. selector guide appears at end of data sheet. tx v cc di/t1in z(b)/t1out r1out b/r1in gnd fast hdplx shdn y(a)/t2out a/r2in cts 13 10 de485/t2in rts 11 15 6 ro/r2out rx 12 8 13 7 14 9 10 12 16 5 11 rj45 db9 shdn p spi max3100 rs-485/rs232 2 max3160e +3v to +5.5v 4 for price, delivery, and to place orders, please contact maxim distribution at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. ordering information part temp range pin- package package code max3160e cap 0 c to +70 c 20 ssop a20-2 max3160eeap -40 c to +85 c 20 ssop a20-2 max3161e cag 0 c to +70 c 24 ssop a24-3 max3161eeag -40 c to +85 c 24 ssop a24-3 max3162e cai 0 c to +70 c 28 ssop a28-1 max3162eeai -40 c to +85 c 28 ssop a28-1
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v cc = +3v to +5.5v, c1?4 = 0.1? when tested at +3.3v ?0%; c1 = 0.047? and c2, c3, c4 = 0.33? when tested at +5v?0%; t a = t min to t max , unless otherwise noted. typical values are at v cc = +3.3v and t a = +25?.) (note 2) 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. note 1: v+ and v- can have maximum magnitudes of 7v, but their absolute difference cannot exceed 13v. v cc to gnd. .............................................................-0.3v to +6v v+ to gnd ................................................................-0.3v to +7v v- to gnd. ................................................................-7v to +0.3v v+ - v- (note 1)....................................................................+13v input voltages t1in, t2in, di, de485, re485 , te232, re232 , shdn , fast, hdplx, rs485/ rs232 to gnd. .................-0.3v to +6v a, b, r1in, r2in to gnd .................................................?5v output voltages t1out, t2out, y, z to gnd (v cc = 0 or shdn = gnd) ..............................................................?3.2v t1out, t2out to gnd (v cc = 5.5v and shdn = v cc ) .....................................................-13.2v to +9v r2out, r1out, ro to gnd..................-0.3v to (v cc + 0.3v) output short-circuit duration t1out, t2out, y, z ..............................................continuous continuous power dissipation (t a = +70?) 20-pin ssop (derate 8.0mw/? above +70?) ...........640mw 24-pin ssop (derate 8.0mw/? above +70?) ...........640mw 28-pin ssop (derate 9.1mw/? above +70?) ...........727mw operating temperature ranges max316_ca_ ......................................................0? to +70? max316_ea_ ...................................................-40? to +85? storage temperature range .............................-65? to +150? junction temperature ......................................................+150? lead temperature (soldering, 10s) .................................+300? parameter symbol conditions min typ max units dc characteristics max3160e/max3161e, no load, rs-485/ rs-232 = gnd 1.2 2.8 max3160e/max3161e, no load, rs-485/ rs-232 = v cc 2.5 5.5 v cc standby current i cc max3162e, no load 3 6 ma v cc shutdown current i shdn shdn = gnd, receiver inputs open or grounded 0.01 1a transmitter and logic inputs (di, t1in, t2in, de485, r r r r e e e e 4 4 4 4 8 8 8 8 5 5 5 5 , te232, r r r r e e e e 2 2 2 2 3 3 3 3 2 2 2 2 , fast, hdplx, shdn , rs-485/ r r r r s s s s - - - - 2 2 2 2 3 3 3 3 2 2 2 2 ) logic-input low v il 0.8 v v cc = +3.3v 2.0 logic-input high v ih v cc = +5v 2.4 v logic-input leakage current i inl 0.01 1a transmitter logic hysteresis v hys 0.5 v rs-232 and rs-485/rs-422 receiver outputs (r1out, r2out, ro) receiver output-voltage low v ol i out = 2.5ma 0.4 v receiver output-voltage high v oh i out = -1.5ma v cc - 0.6 v receiver output short-circuit current i osr 0 v o v cc 20 85 ma receiver output leakage current i ozr receivers disabled 0.05 1a
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers _______________________________________________________________________________________ 3 electrical characteristics (continued) (v cc = +3v to +5.5v, c1?4 = 0.1? when tested at +3.3v ?0%; c1 = 0.047? and c2, c3, c4 = 0.33? when tested at +5v?0%; t a = t min to t max , unless otherwise noted. typical values are at v cc = +3.3v and t a = +25?.) (note 2) parameter symbol conditions min typ max units rs-232 receiver inputs (r1in, r2in) input voltage range -25 +25 v logic-input low 0.8 v cc = +3.3v 2.0 logic-input high v cc = +5v 2.4 v input hysteresis 0.5 v v cc = +3.0v to 5.5v 3 5 7 input resistance v cc = 0 6 11 16 k ? rs-485/rs-422 receiver inputs (note 3) max3160e 48 input resistance r in -7v < v cm < +12v max3161e/ max3162e 96 k ? v cm +12v -200 -50 mv input hysteresis ? v th 30 mv rs-232 transmitter outputs (t1out, t2out) output voltage swing both transmitter outputs loaded with 3k ? to gnd 5 5.4 v output resistance v cc = v+ = v- = 0, t_out = ?v 300 10m ? output short-circuit current i sc t_out = gnd 30 60 ma max3160e 125 max3161e 25 output leakage current i o v out = 9v te232 = gnd or shdn = gnd max3162e 25 ? rs-485/rs-422 transmitter outputs (y, z) r = 27 ? (rs-485) 1.5 differential output voltage v od figure 1 r = 50 ? (rs-422) 2 v change in magnitude of differential output voltage for complementary output states | ? v od | r = 27 ? or 50 ? , figure 1 0.2 v common-mode output voltage v oc r = 27 ? or 50 ? , figure 1 3 v change in magnitude of common-mode output voltage for complementary output states | ? v oc | r = 27 ? or 50 ? , figure 1 0.2 v
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers 4 _______________________________________________________________________________________ parameter symbol conditions min typ max units output short-circuit current i sc v y or v z = -7v to +12v 250 ma max3160e 125 max3161e 25 output leakage current i o v y or v z = -7v or +12v, de485 = gnd or shdn = gnd max3162e 25 ? rs-232 transmitter timing characteristics (slow mode, fast = gnd, 250kbps , one transmitter switching) maximum data rate r l = 3k ? , c l = 1000pf 250 kbps transmitter skew t tskew r l = 3k ? , c l = 150pf, figure 6 25 ns c l = 150pf to 1000pf 630 transition-region slew rate v cc = +3.3v, t a = +25 c, r l = 3k ? to 7k ? , measured from +3.0v to -3.0v or -3.0v to +3.0v c l = 150pf to 2500pf 430 v/? rs-232 transmitter timing characteristics (fast mode, fast = v cc , 1mbps, one transmitter switching) v cc = +3v to +4.5v, r l = 3k ? , c l = 250pf 1 maximum data rate v cc = +4.5v to +5.5v, r l = 3k ? , c l = 1000pf 1 mbps transmitter skew t tskew r l = 3k ? , c l = 150pf, figure 6 10 ns max3160e 13 150 transition-region slew rate v cc = +3.3v, t a = +25 c, r l = 3k ? to 7k ? , c l = 150pf to 1000pf, measured from +3.0v to -3.0v or -3.0v to +3.0v max3161e max3162e 24 150 v/? rs-232 receiver timing characteristics receiver propagation delay t phl ,t plh r_in to r_out, c l = 15pf, figure 5 0.15 ? receiver output enable time t rzl ,t rzh c l = 50pf, figures 2, 10, max3162e 200 ns receiver output disable time t rlz ,t rhz c l = 15pf, figures 2, 10, max3162e 200 ns receiver skew t rskew c l = 50pf, figure 5 100 ns rs-485/rs-422 driver timing characteristics (slow mode, fast = gnd, 250kbps) differential driver propagation delay t dphl , t dplh r diff = 54 ? , c l = 50pf, figures 3, 7 200 400 800 ns differential driver rise and fall time t dr, t df r diff = 54 ? , c l = 50pf, figures 3, 7 200 400 800 ns differential driver propagation delay skew t dskew r diff = 54 ? , c l = 50pf, figures 3, 7 200 ns driver output enable time t dzh , t dzl c l = 50pf, figures 4, 8 400 900 ns driver output disable time t dlz , t dhz c l = 50pf, figures 4, 8 200 400 ns electrical characteristics (continued) (v cc = +3v to +5.5v, c1?4 = 0.1? when tested at +3.3v ?0%; c1 = 0.047? and c2, c3, c4 = 0.33? when tested at +5v?0%; t a = t min to t max , unless otherwise noted. typical values are at v cc = +3.3v and t a = +25?.) (note 2)
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers _______________________________________________________________________________________ 5 parameter symbol conditions min typ max units rs-485/rs-422 driver timing characteristics fast mode, fast = v cc , 10mbps) differential driver propagation delay t dphl, t dplh r diff = 54 ? , c l = 50pf, figures 3, 7 60 120 ns differential driver rise and fall times t dr , t df r diff = 54 ? , c l = 50pf, figures 3, 7 10 25 ns differential driver propagation delay skew t dskew r diff = 54 ? , c l = 50pf, figures 3, 7 10 ns driver output enable time t dzh ,t dzl c l = 50pf, figures 4, 8 400 900 ns driver output disable time t dhz ,t dlz c l = 50pf, figures 4, 8 200 400 ns rs-485/rs-422 receiver timing characteristics receiver propagation delay t rplh , t rphl c l = 15pf, figures 9, 11 80 150 ns receiver propagation delay skew t rskew c l = 15pf, figures 9, 11 1 10 ns receiver output enable time t rzl , t rzh max3162e, c l = 50pf, figures 2, 10 100 ns receiver output disable time t rlz , t rhz max3162e, c l = 15pf, figures 2, 10 100 ns esd protection r_in, t_out, a, b, y, z human body model ?5 kv electrical characteristics (continued) (v cc = +3v to +5.5v, c1?4 = 0.1? when tested at +3.3v ?0%; c1 = 0.047? and c2, c3, c4 = 0.33? when tested at +5v?0%; t a = t min to t max , unless otherwise noted. typical values are at v cc = +3.3v and t a = +25?.) (note 2) t ypical operating characteristics (v cc = +3.3v, 250kbps data rate, c bypass , c1, c2, c3, c4 = 0.1?, all rs-232 transmitters (rs-232 mode) loaded with 3k ? to ground, t a = +25?, unless otherwise noted.) -10.00 -5.00 -7.50 -2.50 5.00 7.50 2.50 0 10.00 0 1000 2000 3000 4000 5000 rs-232 transmitter output voltage vs. load capacitance (fast = gnd) max3160e toc01 load capacitance (pf) transmitter output voltage (v) -10.00 -5.00 -7.50 -2.50 5.00 7.50 2.50 0 10.00 0 500 1000 1500 2000 2500 rs-232 transmitter output voltage vs. load capacitance (fast = v cc ) max3160e toc02 load capacitance (pf) transmitter output voltage (v) data rate = 1mbps 0 4 2 8 6 10 12 16 14 18 0 1000 2000 3000 4000 5000 rs-232 transmitter slew rate vs. load capacitance (fast = gnd) max3160e toc03 load capacitance (pf) slew rate (v/ s) rising falling note 2: all currents into the device are positive. all currents out of the device are negative. note 3: applies to a, b for max3162e and max3160e/max3161e with hdplx = gnd, or y, z for max3160e/max3161e with hdplx = v cc.
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers 6 _______________________________________________________________________________________ 0 50 150 100 200 250 -40 10 -15 35 60 85 shutdown current vs. temperature max3160e toc07 temperature ( c) shutdown current (na) 0 40 20 80 60 120 100 140 046 2810 12 rs-485/rs-422 output current vs. driver-output low voltage max3160e toc08 output low voltage (v) output current (ma) 0 40 20 80 60 120 100 140 -7 -3 -1 -5 135 rs-485/rs-422 output current vs. driver-output low voltage max3160e toc09 output low voltage (v) output current (ma) 0 20 10 40 30 60 50 70 90 80 100 01.0 1.5 0.5 2.0 2.5 3.0 3.5 4.0 rs-485/rs-422 driver output current vs. differential output voltage max3160e toc10 output low voltage (v) output current (ma) 2.0 2.3 2.2 2.1 2.4 2.5 2.6 2.7 2.8 2.9 3.0 -40 10 -15 35 60 85 rs-485/rs-422 driver differential output vs. temperature max3160e toc11 temperature ( c) output voltage (v) r diff = 100 ? figure 1 0 10 5 20 15 25 30 01.5 2.0 0.5 1.0 2.5 3.0 3.5 receiver output current vs. receiver- output low voltage max3160e toc12 output low voltage (v) output current (ma) t ypical operating characteristics (continued) (v cc = +3.3v, 250kbps data rate, c bypass , c1, c2, c3, c4 = 0.1?, all rs-232 transmitters (rs-232 mode) loaded with 3k ? to ground, t a = +25?, unless otherwise noted.) 0 20 10 50 40 30 60 70 100 90 80 110 0 400 800 1200 1600 2000 rs-232 transmitter slew rate vs. load capacitance (fast = v cc ) max3160e toc04 load capacitance (pf) slew rate (v/ s) rising falling 0 30 20 10 40 50 60 02 000 1000 3000 4000 5000 operating supply current vs. load capacitance when transmitting data (rs-232 mode) max3160e to05 load capacitance (pf) supply current (ma) data rate = 1mbps data rate = 250kbps data rate = 20kbps 0 1.0 0.5 2.0 1.5 2.5 3.0 -40 10 -15 35 60 85 max3160e/max3161e no-load supply current vs. temperature max3160e toc06 temperature ( c) supply current (ma) rs-485 mode rs-232 mode
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers _______________________________________________________________________________________ 7 0 30 20 10 40 50 60 70 80 90 100 -40 10 -15 35 60 85 rs-485/rs-422 receiver propagation delay vs. temperature max3160e toc14 temperature ( c) propagation delay (ns) rising falling 20 30 25 40 35 45 50 -40 10 -15 35 60 85 rs-485/rs-422 driver propagation delay vs. temperature (fast = v cc ) max3160e toc15 temperature ( c) propagation delay (ns) c l = 50pf r diff = 54 ? data rate = 10mbps falling rising 100 200 150 300 250 350 400 -40 10 -15 35 60 85 rs-485/rs-422 driver propagation delay vs. temperature (fast = gnd) max3160e toc16 temperature ( c) propagation delay (ns) c l = 50pf r diff = 54 ? data rate = 250kbps falling rising 20ns/div rs-485/rs-422 driver propagation (fast = v cc , 10mbps) v y - v z 2v/div di 2v/div max3160e toc17 c l = 50pf r diff = 54 ? 1.0 s/div rs-485/rs-422 driver propagation (fast = gnd, 250kbps) v y - v z 2v/div di 2v/div max3160e toc18 c l = 50pf r diff = 54 ? 4ns/div rs-485/rs-422 receiver propagation (fast = v cc , 5mbps) v y - v z 2v/div ro 2v/div max3160e toc20 c l = 15pf 100ns/div rs-485/rs-422 receiver propagation (fast = v cc , 5mbps) v y - v z 2v/div max3160e toc21 c l = 50pf r diff = 54 ? de485 2v/div 0 4 2 8 6 12 10 14 0 1.0 1.5 0.5 2.0 2.5 3.0 3.5 receiver output current vs. receiver-output high voltage max3160e toc13 output-high voltage (v) output current (ma) t ypical operating characteristics (continued) (v cc = +3.3v, 250kbps data rate, c bypass , c1, c2, c3, c4 = 0.1?, all rs-232 transmitters (rs-232 mode) loaded with 3k ? to ground, t a = +25?, unless otherwise noted.) -1000 -800 -400 -600 0 200 -200 400 -20 -10 -5 -15 0 5 1 01520 i-v output impedance curve in rs-232 shutdown mode max3160e toc19 output voltage (v) output current ( a)
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers 8 _______________________________________________________________________________________ 1.0 s/div max3160e rs-232 transmitter propagation (fast = gnd, 250kbps) t_out 5v/div max3160e toc22 c l = 1000pf r l = 7k ? di 2v/div 1.0 s/div max3160e rs-232 transmitter propagation (fast = v cc , 250kbps) t_out 5v/div max3160e toc23 c l = 150pf r l = 7k ? di 2v/div 1.0 s/div max3161e/max3162e rs-232 transmitter propagation (fast = gnd, 250kbps) t_out 5v/div max3160e toc24 c l = 1000pf r l = 7k ? di 2v/div 1.0 s/div max3161e/max3162e rs-232 transmitter propagation (fast = v cc , 250kbps) t_out 5v/div max3160e toc25 c l = 150pf r l = 7k ? di 2v/div -10.00 -5.00 -7.50 0 -2.50 2.50 5.00 7.50 10.00 2.0 3.0 3.5 2.5 4.0 4.5 5.0 5.5 6.0 transmitter output voltage vs. supply voltage (fast = gnd) max3160e toc26 supply voltage (v) transmitter output voltage (v) inputs at v cc and gnd 2 transmitters loaded with 3k ? 0 2 4 6 8 10 12 2.0 3.0 2.5 3.5 4.0 4.5 5.0 5.5 6.0 supply current vs. supply voltage with rs-232 running (fast = gnd) max3160e toc27 supply voltage (v) supply current (ma) c l = 50pf r l = 3k ? 1 transmitter at 250kbps t ypical operating characteristics (continued) (v cc = +3.3v, 250kbps data rate, c bypass , c1, c2, c3, c4 = 0.1?, all rs-232 transmitters (rs-232 mode) loaded with 3k ? to ground, t a = +25?, unless otherwise noted.)
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers _______________________________________________________________________________________ 9 pin description pin max3160e max3161e max3162e name function 11 1 c1+ positive terminal of the positive flying capacitor 222v cc positive supply voltage 33 3 c1- negative terminal of the positive flying capacitor 44 4 gnd ground ? 5 t1out rs-232 driver output 5 z(b)/t1out inverting rs-485/rs-422 driver output in full-duplex mode (and inverting rs-485/rs-422 receiver input in half-duplex mode)/rs-232 driver output 6 zi nverting rs-485/rs-422 driver output ? z(b) inverting rs-485/rs-422 driver output in full-duplex mode (and inverting rs-485/rs-422 receiver input in half-duplex mode) 6 y(a)/t2out noninverting rs-485/rs-422 driver output in full-duplex mode (and noninverting rs-485/rs-422 receiver input in half-duplex mode)/rs-232 driver output 7 y noninverting rs-485/rs-422 driver output ? y(a) noninverting rs-485/rs-422 driver output in full-duplex mode (and noninverting rs-485/rs-422 receiver input in half-duplex mode) 79 9 r1out rs-232 receiver output ? 8 t2out rs-232 driver output 81 0 ro/r2out rs-485/rs-422 receiver output/rs-232 receiver output 91113 shdn active-low shutdown-control input. drive shdn low to shut down transmitters and charge pump. 10 r2out rs-232 driver output 10 12 14 fast transmitter speed-select input. select slew-rate limiting for rs-232 and rs-485/rs-422. slew-rate limits with a logic-level low. 11 ro rs-485/rs-422 receiver output 11 13 rs - 485/ rs - 232 pin-selectable mode functionality input. operates as rs-485/rs-422 with a logic-level high; operates as rs-232 with a logic-level low. 12 re485 rs-485/rs-422 receiver enable input. logic-level low enables rs-485/rs-422 receivers. 12 14 hdplx pin-selectable mode functionality input. operates in full- duplex mode when low; operates in half-duplex mode when high.
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers 10 ______________________________________________________________________________________ pin description (continued) pin max3160e max3161e max3162e name function 13 a/r2in noninverting rs-485/rs-422 receiver input/rs-232 receiver input 14 b/r1in inverting rs-485/rs-422 receiver input/rs-232 receiver input 15 re232 rs-232 receiver enable. logic-level low enables rs-232 receivers. ? 51 7a noninverting rs-485/rs-422 receiver input 15 19 de485/t2in rs-485/rs-422 driver enable/rs-232 driver input 16 te232 rs-232 transmitter output enable ? 61 8b inverting rs-485/rs-422 receiver input 16 20 di/t1in rs-485/rs-422 driver input/rs-232 driver input ? 71 9 r2in rs-232 receiver input 17 21 25 v- negative charge-pump rail ? 82 0 r1in rs-232 receiver input 18 22 26 c2- negative terminal of the negative flying capacitor 19 23 27 c2+ positive terminal of the negative flying capacitor 20 24 28 v+ positive charge-pump rail 21 t2in rs-232 driver input 22 de485 rs-485/rs-422 driver enable input 23 di rs-485/rs-422 driver input 24 t1in rs-232 driver input
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers ______________________________________________________________________________________ 11 20 19 18 17 16 15 14 13 1 2 3 4 rs-232 outputs logic inputs logic outputs rs-232 inputs c1 c3 c2 c4 shdn hdplx fast rs-485/rs-232 5 6 7 8 12 9 v+ c2+ c2- v- c1- gnd v cc v cc c1+ charge pump t1 t2 r1 r2 c bypass rs-232 mode 11 10 esd protection esd protection max3160e 20 19 18 17 16 15 14 13 1 2 3 4 rs-485 outputs logic inputs logic output rs-485 inputs shdn fast rs-485/rs-232 hdplx 5 6 7 8 v+ c2+ c2- v- c1- gnd v cc v cc c1+ c1 c bypass c2 c3 c4 12 11 9 10 charge pump z y b de485 a rs-485 mode d logic input r r0 esd protection esd protection max3160e max3160e functional diagram
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers 12 ______________________________________________________________________________________ max3161e functional diagram c1 c bypass c3 c2 c4 24 23 22 21 20 19 16 15 1 2 3 4 rs-485 outputs logic inputs logic output rs-485 inputs logic input shdn fast rs-485/rs-232 hdplx 5 6 9 10 18 17 7 8 v+ c2+ c2- v- c1- gnd v cc v cc c1+ 14 13 11 12 charge pump z y b de485 a rs-485 mode d r r0 esd protection esd protection max3161e 24 23 22 21 20 19 18 17 1 2 3 4 rs-232 output logic inputs logic outputs rs-232 inputs c1 c3 c2 c4 shdn hdplx fast rs-485/rs-232 5 6 7 8 16 9 v+ c2+ c2- v- c1- gnd v cc v cc c1+ 14 13 11 12 charge pump t1 t2 r1 r2 c bypass rs-232 mode 15 10 esd protection rs-232 output esd protection max3161e
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers ______________________________________________________________________________________ 13 te232 re485 r b a z y ro 28 27 26 25 24 23 22 211 1 2 3 4 rs-485 outputs rs-232 output rs-232 output logic outputs logic input rs-232 inputs c1 c3 c2 c4 shdn fast 5 6 7 8 v+ c2+ c2- v- c1- gnd v cc v cc c1+ 16 15 13 14 charge pump t1 t2 r1 r2 20 19 18 17 logic inputs rs-485 inputs 9 10 11 12 logic inputs d de485 c bypass esd protection esd protection re-232 max3162e max3162e functional diagram c l r diff v od z 3v de485 y di c l v cc output under test s1 s2 500 ? figure 3. rs-485/rs-422 driver timing test circuit figure 4. rs-485/rs-422 driver enable/disable timing test load 1k c l v cc test point receiver output s1 1k ? s2 figure 2. rs-485/rs-422 and rs-232 receiver enable/disable timing test load fi gur e 1. rs-485/rs-422 driver dc test load v od v oc r r z y t est circuits
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers 14 ______________________________________________________________________________________ t est circuits (continued) t phl t plh 50% v cc 1.5v +3v 1.5v input output 0v 50% gnd t rskew = | t plh - t phl | figure 5. rs-232 receiver propagation-delay timing input output +3v 1.5v 1.5v v+ 0v v- 0v t plh t phl t skew = | t plh - t phl | figure 6. rs-232 transmitter propagation-delay timing di 3v 0 z y v o 0 -v o v o 1.5v t dplh 1/2 v o 10% t dr 90% 90% t dphl 1.5v 1/2 v o 10% t df v diff = v y - v z v diff t dskew = | t dplh - t dphl | output normally low output normally high 3v 0 y, z v ol y, z 0 1.5v 1.5v v ol + 0.5v v oh - 0.5v 2.3v 2.3v t dzl t dlz t dzh t dhz de485 figure 7. rs-485/rs-422 driver propagation delays fi gur e 8. rs-485/rs-422 driver enable and disable times v oh v ol a b 1v -1v v cc /2 v cc /2 output input ro t rplh t rphl t rskew = | t rplh - t rphl | v id c l a b r ro figure 9. rs-485/rs-422 receiver propagation delays fi gur e 11. rs-485 /rs-422 receiver propagation delays test circuit output normally low output normally high 3v 0 v cc ro ro 0 1.5v 1.5v v ol + 0.5v v oh - 0.5v 1.5v 1.5v t rzl t rlz t rzh t rhz re232 or re485 figure 10. max3162 rs-485 /rs-422 and rs-232 receiver enable and disable times
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers ______________________________________________________________________________________ 15 detailed description the max3160e/max3161e/max3162e +3v to +5.5v, multiprotocol transceivers can be pin-configured in a number of rs-232 and rs-485/re-422 interface combi- nations. these circuit configurations are ideal for the design of rs-232 to rs-485 converters, multiprotocol buses, or any application that requires both rs-232 and rs-485 transceivers. the slew rate of these devices is on-the-fly pin selectable, allowing reduced emi data rates, or up to 10mbps rs-485 communications. power consumption can be reduced to 10na by using the shutdown function, but the rs-232 receivers remain active allowing other devices to query the interface con- troller. a flow-through pinout and the space-saving ssop packages (available in commercial and extended temperature ranges) facilitate board layout. device selection the max3160e/max3161e/max3162e contain rs-232 transceivers and an rs-485/rs-422 transceiver. the primary difference between the devices is the multi- plexing of the i/o ports. the max3160e has common transmitter outputs and receiver inputs for its rs-232 and rs-485/rs-422 trans- ceivers, and common digital i/o ports. the max3160e is optimized for multiprotocol operation on a single interface bus and comes in a 20-pin ssop package. the max3161e has separate transmitter outputs and receiver inputs for its rs-232 and rs-485/rs-422 trans- ceivers, and common digital i/o ports. the max3161e is optimized for multiplexing a single uart across two inter- face buses and is available in a 24-pin ssop package. the max3162e has separate transmitter outputs and receiver inputs for its rs-232 and rs-485/rs-422 trans- ceivers, and separate digital i/o ports. the max3162e is optimized for protocol translation between two inter- face buses and comes in a 28-pin ssop package. see tables 1?2 , the functional diagrams , and the fol- lowing descriptions for details on each device. max3160e the max3160e is a 2t x /2r x rs-232 transceiver in rs-232 mode, capable of rs-232-compliant communi- cation. assertion of rs-485/ rs-232 converts the device to a single rs-485 transceiver by multiplexing the rs- 232 i/o ports to an rs-485 driver and receiver pair. the logic inputs now control the driver input and the driver enable. one logic output carries the rs-485 receiver out- put, and the other is tri-stated. the receiver input imped- ance is dependent on the device mode and is 1/4-unit load for rs-485 operation and 5k ? for rs-232 operation. max3161e the max3161e is a 2t x /2r x rs-232 transceiver in rs-232 mode or a single rs-485/rs-422 transceiver in rs-485 mode. when in rs-485 mode, the unused rs- 232 transmitter and receiver outputs are disabled. when in rs-232 mode, the rs-485 transmitter outputs are dis- abled and the rs-232 receiver inputs are 5k ? to gnd. the rs-485 receiver inputs are always 1/8-unit load. logic lines are shared between the two protocols and are used for signal inputs and as an rs-485 driver enable. max3162e the max3162e is a 2tx/2rx rs-232 transceiver and a single rs-485/rs-422 transceiver simultaneously. all drivers, receivers, and transmitters can be enabled or disabled by pin selection. all outputs are high-imped- ance when not activated. rs-232 receiver inputs are 5k ? when enabled, and rs-485 receiver inputs are 1/8-unit load. fast-mode operation the fast control input is used to select the slew-rate limiting of the rs-232 transmitters and the rs-485/ rs-422 drivers. with fast unasserted, the rs-232 transmitters and the rs-485/rs-422 driver are slew-rate limited to reduce emi. rs-232 data rates up to 1mbps and rs-485/rs-422 data rates up to 10mbps are possi- ble when fast is asserted. fast can be changed dur- ing operation without interrupting data communications. half-duplex rs-485/rs-422 operation asserting hdplx places the max3160e/max3161e in half-duplex mode. the rs-485 receiver inputs are inter- nally connected to the driver outputs. to receive rs-485 data, disable the rs-485 outputs by driving de485 low. hdplx has no affect on rs-232 operation. low-power shutdown the max3160e/max3161e/max3162e have an active- low shutdown control input, shdn . when shdn is dri- ven low, the charge pump and transmitters are shut down and supply current is reduced to 10na. the rs-232 receiver outputs remain active if in rs-232 mode. the charge-pump capacitors must be recharged when coming out of shutdown before resum- ing operation in either rs-232 or rs-485/rs-422 mode (figure 12). dual charge-pump voltage converter the max3160e/max3161e/max3162e? internal power supply consists of a regulated dual charge pump that provides output voltages of +5.5v (doubling charge pump), and -5.5v (inverting charge pump), for input voltages (v cc ) over the +3.0v to +5.5v range. the charge pumps operate in a discontinuous mode. if the
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers 16 ______________________________________________________________________________________ magnitude of either output voltage is less than +5.5v, the charge pumps are enabled. if the magnitude of both output voltages exceeds +5.5v, the charge pumps are disabled. each charge pump requires a fly- ing capacitor (c1, c2) and a reservoir capacitor (c3, c4) to generate the v+ and v- supplies (see the functional diagrams). rs-485/rs-422 transceivers the max3160e/max3161e/max3162e rs-485/rs-422 transceivers feature fail-safe circuitry that guarantees a logic-high receiver output when the receiver inputs are open or shorted, or when they are connected to a ter- minated transmission line with all drivers disabled (see the fail-safe section). the max3160e/max3161e/ max3162e also feature pin-selectable reduced slew- rate drivers that minimize emi and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to 250kbps the trans- mitters can operate at speeds up to 10mbps with the slew-rate limiting disabled. drivers are short-circuit cur- rent limited and thermally limited to protect them against excessive power dissipation. half-duplex com- munication is enabled by driving hdplx high (max3160e/max3161e.) fail-safe the max3160e/max3161e/max3162e guarantee a logic-high rs-485 receiver output when the receiver inputs are shorted or open, or when they are connected to a terminated transmission line with all drivers dis- abled. this is done by having the receiver 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 receiver? differential input voltage is pulled to 0 by the termination. this results in a logic-high with a 50mv minimum noise margin. rs-232 transceivers the max3160e/max3161e/max3162e rs-232 trans- mitters are inverting-level translators that convert cmos-logic levels to ?v eia/tia-232-compliant lev- els. the transmitters are guaranteed at a 250kbps data rate in slew-rate limited mode (fast = gnd) with worst-case loads of 3k ? in parallel with 1000pf. data rates up to 1mbps can be achieved by asserting fast. when powered down or in shutdown, the max3160e/ max3161e/max3162e outputs are high impedance and can be driven to ?3.2v. the transmitter inputs do not have pullup resistors. connect unused inputs to ground or v cc . the receivers convert rs-232 signals to cmos-logic out- put levels. all receivers have inverting outputs that remain active in shutdown. the max3160e/max3161e/ max3162e permit their receiver inputs to be driven to ?5v. floating receiver input signals are pulled to ground through internal 5k ? resistors, forcing the out- puts to a logic-high. the max3162e has transmitter and receiver enable pins that allow its outputs to be tri-stated. 15kv esd protection as with all maxim devices, esd-protection structures are incorporated on all pins to protect against esd encoun- tered during handling and assembly. the max3160e/ max3161e/max3162e receiver inputs and transmitter outputs have extra protection against static electricity found in normal operation. maxim? engineers developed state-of-the-art structures to protect these pins against ?5kv esd, without damage. after an esd event, the max3160e/max3161e/max3162e continue working without latchup. the receiver inputs and transmitter outputs are charac- terized for ?5kv esd protection using the human body model esd test conditions esd performance depends on a number of conditions. contact maxim for a reliability report that documents test setup, methodology, and results. human body model figure 13a shows the human body model, and figure 13b 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 inter- est, which is then discharged into the device through a 1.5k ? resistor.
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers ______________________________________________________________________________________ 17 machine model the machine model for esd testing uses a 200pf stor- age capacitor and zero-discharge resistance. it mimics the stress caused by handling during manufacturing and assembly. of course, all pins (not just rs-485 inputs) require this protection during manufacturing. therefore, the machine model is less relevant to the i/o ports than are the human body model and iec 1000-4-2. applications information capacitor selection the capacitor type used for c1?4 is not critical for proper operation; polarized or nonpolarized capacitors can be used. ceramic chip capacitors with an x7r dielectric provide the best combination of performance, cost, and size. the charge pump requires 0.1? capacitors for 3.3v operation. for other supply volt- ages, see table 13 for required capacitor values. do not use values smaller than those listed in table 13 . increasing the capacitor values reduces ripple on the transmitter outputs and slightly reduces power con- sumption. c2, c3, and c4 can be changed without changing c1? value. however, do not increase c1 without also increasing the values of c2, c3, c4, and c bypass to maintain the proper ratios to the other capacitors. when using the minimum required capacitor values, make sure the capacitance value does not degrade excessively with temperature or voltage. this is typical of y5v and z5u dielectric ceramic capacitors. if in doubt, use capacitors with a larger nominal value. the capacitor? equivalent series resistance (esr), which usually rises at low temperatures, influences the amount of ripple on v+ and v-. power-supply decoupling in applications that are sensitive to power-supply noise, decouple v cc to ground with a capacitor of the same value as reservoir capacitors c2, c3, and c4. connect the bypass capacitor as close to the ic as possible. 40 s/div shdn 5v/div t1out 2v/div gnd t2out 2v/div figure 12. rs-232 transmitter outputs when exiting shutdown charge-current limit resistor discharge resistance storage capacitor c s 100pf r c 1m ? r d 1.5k ? high- voltage dc source device under test figure 13a. 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 amperes figure 13b. human body model current waveform
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers 18 ______________________________________________________________________________________ rs-232 transmitter outputs when exiting shutdown figure 12 shows two transmitter outputs when exiting shutdown mode. as they become active, the two trans- mitter outputs are shown going to opposite rs-232 lev- els (one transmitter input is high, the other is low). each transmitter is loaded with 3k ? in parallel with 1000pf. the transmitter outputs display no ringing or undesir- able transients as they come out of shutdown. note that the transmitters are enabled only when v- exceeds approximately -3v. high data rates the max3160e/max3161e/max3162e maintain the rs-232 ?v required minimum transmitter output voltage even at high data rates. figure 14 shows a transmitter loopback test circuit. figure 15 shows a loopback test result at 250kbps, and figure 16 shows the same test at 1mbps. figure 15 demonstrates a single slew-rate limit- ed transmitter driven at 250kbps (fast = gnd) into an rs-232 load in parallel with 1000pf. figure 17 shows a single transmitter driven at 1mbps (fast asserted), loaded with an rs-232 receiver in parallel with 1000pf. these transceivers maintain the rs-232 ?v minimum transmitter output voltage at data rates up to 1mbps. 256 transceivers on the bus the standard rs-485 receiver input impedance is 12k ? (one-unit load), and the standard driver can drive up to 32-unit loads. the max3160e has a 1/4-unit load receiver input impedance (48k ? ), allowing up to 128 transceivers to be connected in parallel on one com- munication line. the max3161e/max3162e have 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 and/or other rs-485 transceivers with a total of 32-unit loads or fewer can be connected to the line. rs-485/rs-422 driver output protection two mechanisms prevent excessive output current and power dissipation caused by faults or by bus con- tention. the first, a foldback current limit on the output stage, provides immediate protection against short cir- cuits over the whole common-mode voltage range (see the typical operating characteristics ). the second, a thermal shutdown circuit, forces the driver outputs into a high-impedance state if the die temperature becomes excessive, typically over +150?. protection against wiring faults eia/tia-485 standards require a common input voltage range of -7v to +12v to prevent damage to the device. the max3160e/max3161e/max3162e inputs are pro- tected to rs-232 levels of ?5v for the receiver inputs and ?3v for the transmitter/driver outputs. this pro- vides additional protection for the rs-485 transceivers against ground differential or faults due to miswiring. rs-485/rs-422 reduced emi and reflections the max3160e/max3161e/max3162e can be config- ured for slew-rate limiting by pulling fast low. this mini- mizes emi and reduces reflections caused by improperly terminated cables. operation in slew-rate limited mode reduces the amplitudes of high-frequency harmonics. rs-485/rs-422 line length vs. data 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 17. rs-232/rs-485 protocol translator figure 18 shows the max3162e configured as an rs-232/rs-485 protocol translator. the direction of translation is controlled through the rts signal (r1in). the single-ended rs-232 receiver input signal is trans- lated to a differential rs-485 transmitter output. similarly, a differential rs-485 receiver input signal is translated to a single-ended rs-232 transmitter output. rs-232 data received on r 2in is transmitted as an rs- 485 signal on z and y. rs-485 signals received on a and b are transmitted as an rs-232 signal on t1 out . max3160e max3161e max3162e 5k r_ in r_ out c2- c2+ c1- c1+ v- v+ v cc c4 c3 c1 c2 v cc c bypass shdn t_ out t_ in gnd v cc 1000pf figure 14. loopback test circuit
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers ______________________________________________________________________________________ 19 m ultiprotocol bus the typical operating circuit shows a standard appli- cation for the max3160e. the max3160e? outputs are multiplexed between rs-232 and rs-485 protocols by a microprocessor (p). the ? also directs the shut- down functions, enable lines, and the duplex of the max3160e. data is transmitted to the max3100 uart through an spi port. the uart asynchronously transfers data through the max3160e to the pin-select- ed rs-232 or rs-485 protocal. see table 14 for com- monly used cable connections. multiprotocol bus multiplexer the typical application circuit shows the max3161e configured as a multiprotocol bus multiplexer. the max3161e separates the rs-232 and rs-485 lines, but shares the logic pins between modes. this application allows the ? to monitor a point-to-point rs-232 bus, and a multidrop rs-485 interface. the max3100 uart asyn- chronously transfers data through the max3161e to the pin-selected rs-232 or rs-485 protocol. 1 s/div r out t out 5v/div t in 1 s/div r out figure 15. max3161e/max3162e rs-232 loopback test result at 250kbps, fast = low 200ns/div t out 5v/div r out t in figure 16. max3161e/max3162e rs-232 loopback test result at 1mbps, fast = high spi is a registered trademark of motorola, inc.
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers 20 ______________________________________________________________________________________ a b z d data out data in r di de485 re485 ro y 120 ? 120 ? note: re485 on max3162e only max3160e max3161e max3162e figure 17. rs-485 line repeater max3162e r1out ro re485 de485 a b z y v- r1in re232 te232 fast v+ t1out c2- c2+ c1- c1+ v cc t1in r2out di r2in gnd 27 26 13 5 10 23 19 20 15 16 14 28 25 7 6 18 17 22 12 9 11 24 3 1 c1 100nf c2 100nf rcv tx rts c3 100nf c4 100nf 2 3.3v c bypass 100nf shdn figure 18. protocol translator
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers ______________________________________________________________________________________ 21 inputs outputs shdn rs-485/ r r r r s s s s - - - - 2 2 2 2 3 3 3 3 2 2 2 2 di/t1in, de485/t2in z(b)/t1out, y(a)/t2out 0x x 1/8-unit load 10 0 1 10 1 0 11 x rs-485 mode table 1. max3160e inputs outputs shdn rs-485/ r r r r s s s s - - - - 2 2 2 2 3 3 3 3 2 2 2 2 di/t1in, de485/t2in t1out, t2out 0x x high-impedance 10 0 1 10 1 0 11 x high-impedance table 2. max3161e inputs outputs shdn te232 t1in,t2in t1out, t2out 0x x high-impedance x0 x high-impedance 11 0 1 11 1 0 table 3. max3162e inputs outputs shdn rs-485/ r r r r s s s s - - - - 2 2 2 2 3 3 3 3 2 2 2 2 b/r1in, a/r2in r1out, ro/r2out x0 0 1 x0 1 0 x0 inputs open 1 x1 x r1out high-impedance, ro/r2out in rs-485 mode table 4. max3160e inputs outputs shdn rs-485/ r r r r s s s s - - - - 2 2 2 2 3 3 3 3 2 2 2 2 r1in, r2in r1out, ro/r2out x0 0 1 x0 1 0 x0 inputs open 1 x1 x r1out high-impedance, ro/r2out in rs-485 mode table 5. max3161e inputs outputs shdn r r r r e e e e 2 2 2 2 3 3 3 3 2 2 2 2 r1in, r2in r1out, r2out x1 x high-impedance x0 0 1 x0 1 0 x0 inputs open 1 table 6. max3162e rs-232 transmitters truth tables rs-232 receivers truth tables
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers 22 ______________________________________________________________________________________ inputs outputs shdn rs-485/ r r r r s s s s - - - - 2 2 2 2 3 3 3 3 2 2 2 2 de485/t2in di/t1in z(b)/t1out y(a)/t2out 0 xxx1/ 8-unit load 1/8-unit load 110x1/8-un it load 1/8-unit load 1110 1 0 1111 0 1 x0 xx rs-232 mode table 7. max3160e inputs outputs shdn rs-485/ r r r r s s s s - - - - 2 2 2 2 3 3 3 3 2 2 2 2 de485/t2in di/t1in z(b) y(a) 0 xxx1/8-un it load 1/8-unit load x0xx1/ 8-unit load 1/8-unit load xx0x1/ 8-unit load 1/8-unit load 1110 1 0 1111 0 1 table 8. max3161e inputs outputs shdn de485 di z y 0x xh igh-impedance high-impedance x0 xh igh-impedance high-impedance 110 1 0 111 0 1 table 9. max3162e inputs output rs-485/ r r r r s s s s - - - - 2 2 2 2 3 3 3 3 2 2 2 2 shdn hdplx (a - b)* (y - z)* ro/r2out 10xxx high-impedance up to v cc 110 -50mv x 1 110 -200mv x 0 110 floating x 1 111x -50mv 1 111x -200mv 0 111 x floating 1 0x xx x rs-232 mode table 10. max3160e * y and z correspond to pins y(a)/t2out and z(b)/t1out. a and b correspond to pins a/r2in and b/r1in. rs-485/rs-422 drivers truth tables rs-485/rs-422 receivers truth tables
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers ______________________________________________________________________________________ 23 supply voltage (v) c1 (f) c2, c3, c4, c bypass (f) +3.0 to +3.6 0.1 0.1 +4.5 to +5.5 0.047 0.33 +3.0 to +5.5 0.1 0.47 table 13. required minimum capacitance values inputs output rs-485/rs-232 shdn hdplx a - b y(a) - z(b) ro/r2out 10 xxx high-impedance up to v cc 110 -50mv x 1 110 -200mv x 0 110 floating x 1 111x -50mv 1 111x -200mv 0 111 x floating 1 0x xxx rs-232 mode table 11. max3161e inputs output shdn r r r r e e e e 4 4 4 4 8 8 8 8 5 5 5 5 a - b ro 0x x high-impedance x1 x high-impedance 10 -50mv 1 10 -200mv 0 1 0 inputs 1 table 12. max3162e rs-485/rs-422 receivers truth tables (continued)
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers 24 ______________________________________________________________________________________ tx v cc hdplx di/t1in t1out r1out r1in de485/t2in gnd fast shdn t2out ro/r2out r2in rx rts cts 13 rs-485/rs-232 12 11 10 19 8 10 17 9 18 y(a) rs-485 z(b) 7 6 1 412 13 11 20 5 rj45 db9 rs-232 shdn p max3100 214 uart max3161e spi +3.3v rs-485/ rs-232 multiprotocol bus multiplexer t ypical application circuit pin number eia/tia-232 standard connector pin max3160e max3161e max3162e equivalent max3160e max3161e max3162e function (as seen by dte) dcd 1 data carrier detect rd 2 r2in 13 17 19 received data td 3 t1out 5 5 5 transmitted data dtr 4 data terminal ready sg 5 gnd 4 4 4 signal ground dsr 6 data set ready rts 7 t2out 6 8 8 req uest to send ( = d te ready) cts 8 r1in 14 18 20 clear to send (= dce ready) ri 9 ring indicator table 14. cable connections commonly used for eia/tia-232 and v.24 asynchronous interfaces
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol transceivers ______________________________________________________________________________________ 25 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 v+ c2+ c2- v- gnd c1- v cc c1+ top view di/t1in de485/t2in b/r1in a/r2in ro/r2out r1out y(a)/t2out z(b)/t1out 12 11 9 10 hdplx fast max3160e ssop rs-485/rs-232 24 23 22 21 20 19 18 17 1 2 3 4 5 6 7 8 v+ c2+ c2- v- gnd c1- v cc c1+ di/t1in de485/t2in r1in r2in t2out y(a) z(b) t1out 16 15 14 13 9 10 11 12 b a hdplx rs-485/rs-232 fast ro/r2out r1out ssop max3161e 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 v+ c2+ c2- v- t1in di re232 de485 t2in r1in r2in b a te232 fast shdn re485 ro r2out r1out t2out y z t1out gnd c1- v cc c1+ ssop max3162e shdn shdn part dual mode flow- through pinout rs-485 input unit loads max3160e no yes 1/4 max3161e no no 1/8 max3162e yes yes 1/8 selector guide chip information transistor count: 1805 process: cmos pin configurations
max3160e/max3161e/max3162e 15kv esd-protected, +3.0v to +5.5v, 10na, rs-232/rs-485/rs-422 multiprotocol 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. 26 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2005 maxim integrated products printed usa is a registered trademark of maxim integrated products, inc. package information ssop.eps package outline, ssop, 5.3 mm 1 1 21-0056 c rev. document control no. approval proprietary information title: notes: 1. d&e do not include mold flash. 2. mold flash or protrusions not to exceed .15 mm (.006"). 3. controlling dimension: millimeters. 4. meets jedec mo150. 5. leads to be coplanar within 0.10 mm. 7.90 h l 0 0.301 0.025 8 0.311 0.037 0 7.65 0.63 8 0.95 max 5.38 millimeters b c d e e a1 dim a see variations 0.0256 bsc 0.010 0.004 0.205 0.002 0.015 0.008 0.212 0.008 inches min max 0.078 0.65 bsc 0.25 0.09 5.20 0.05 0.38 0.20 0.21 min 1.73 1.99 millimeters 6.07 6.07 10.07 8.07 7.07 inches d d d d d 0.239 0.239 0.397 0.317 0.278 min 0.249 0.249 0.407 0.328 0.289 max min 6.33 6.33 10.33 8.33 7.33 14l 16l 28l 24l 20l max n a d e a1 l c h e n 1 2 b 0.068

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