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exar corporation 48720 kato road, fremont ca, 94538 ? (510) 668-7000 ? fax (510) 668-7017 ? www.exar.com xr3160e rs-232/rs-485/rs-422 transceiver with 15kv esd protection sept 2013 rev. 1.0.0 general description the xr3160 is an advanced multiprotocol transceiver supporting rs-232, rs-485, and rs-422 serial standards. full operation requires only four external charge pump capacitors. the rs-485/ rs-232 pin selects rs-485 mode when high and rs-232 mode when low. the half/ full pin configures the rs-485 modes as either half or full duplex. the high speed drivers operate up to 20mbps in rs- 485/422 modes, and up to 1mbps in rs-232 mode. all drivers can be slew limited to 250kbps in any mode to minimize electromagnetic interference (emi) by setting the dedicated slew pin low. all transmitter outputs and receiver inputs feature robust electrostatic discharge (esd) protection to 15kv iec 61000-4-2 airg ap, 15kv human body model (hbm) and 8kv iec 61000-4-2 contact. each receiver output has full fail-safe protection to avoid system lockup, oscillation, or indeterminate states by defaulting to logic-high output level when the inputs are open, shorted, or terminated but undriven. no external biasing resistors are required. the rs-232 receiver inputs include a 5k : pull-down to ground when in rs-232 mode. the rs-485/422 receiver inputs are high impedance (>96k : ), allowing up to 256 devices on a single communication bus (1/8th unit load). the xr3160 operates from a single power supply, 3v to 5.5v, with low idle current. the shutdown mode consumes less than 1 a in low power standby operation with rs-232 receivers enabled. features x pin compatible upgrade for max3160 (20 ssop) x iec level 4 esd protection ! 15kv iec 61000-4-2 air gap discharge ! 8kv iec 61000-4-2 contact discharge ! 15kv human body model (hbm) x 20mbps rs-485 and 1mbps rs-232 data rates x pin-selectable 250kbps slew limiting x single supply operation from +3v to +5.5v x 2 drivers, 2 receivers rs-232/v.28 x 1 driver, 1 receiver rs-485/422 ! full or half duplex configuration ! 1/8th unit load, up to 256 receivers on bus x rs-485/422 enhanced receiver fail-safe for open, shorted, or terminated but idle inputs x 10na shutdown supply current (typical) typical applications x software programmable serial ports (rs-232, rs-422, rs-485) x embedded and industrial pcs (ipc) x process control equipment x point-of-sales equipment x networking equipment x hvac controls equipment x building security and automation ordering information p art n umber p ackage o perating t emperature r ange d evice s tatus XR3160EIU-F 20-pin ssop -40c to +85c in production xr3160ecu-f 20-pin ssop 0c to +70c in production n ote : tape and reel part numbers are xr3160exutr-f, -f = green / rohs compliant
xr3160e 2 rs-232/rs-485/rs -422 transceiver with 15kv esd protection rev. 1.0.0 caution: esd (electrostatic discharge) sensitive device. permanent damage may occur on unconnected devices subject to high energy electrostatic fields. unused devices must be stored in conductive foam or shunts. personnel should be properly grounded prior to handling this device. the protective foam should be discharged to the destination socket before devices are removed. esd protection absolute maximum ratings these are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections to the specifications below is not implied. exposure to absolute maximum rating conditions for extended periods of time may affect reliability and cause permanent damage to the device. supply voltage v cc -0.3v to +6.0v voltage at ttl input pins -0.3v to +6.0v receiver input voltage (from ground) 18v driver output voltage (from ground) 18v short circuit duration, tx out to ground continuous storage temperature range -65c to +150c lead temperature (soldering, 10s) +300c power dissipation 20-pin ssop (derate 12.0mw/c above +70c) 662mw m in . t yp . m ax . u nits tx output & rx input pins 15 kv iec 61000-4-2 airgap 8 kv iec 61000-4-2 contact 15 kv human body model (hbm) all other pins 3 kv human body model (hbm)
xr3160e 3 rev. 1.0.0 rs-232/rs-485/rs-422 transcei ver with 15kv esd protection electrical characteristics u nless otherwise noted : v cc = +3v to +5.5v, c1-c4 = 0.1 f; t a = t min to t max . typical values are at v cc = 3.3v, t a = +25c. s ymbol p arameters m in . t yp . m ax . u nits c onditions dc characteristics i cc supply current (rs-232) 1.2 2.5 ma no load, idle inputs, rs-485/ rs-232 = 0v i cc supply current (rs-485/422) 2.5 5.5 ma no load, idle inputs, rs-485/ rs-232 = v cc i cc v cc shutdown current 0.01 1 a shdn = 0v, receiver inputs open or grounded transmitter and logic input pins (di, t1in, t2in, de, shdn , slew , half/ full , rs-485/ rs-232 ) v il logic input voltage low 0.8 v v ih logic input voltage high 2.0 v v cc = +3.3v v ih logic input voltage high 2.4 v v cc = +5.0v i inl logic input leakage current 0.01 1 a v hys logic input hysteresis 0.2 v rs-232 and rs-485/422 receiver outputs (r1out, r2out, ro) v ol receiver output voltage low 0.4 v i out = 2.5ma v oh receiver output voltage high v cc -0.6 v i out = -1.5ma i oss receiver output short circuit current 20 85 ma 0 d v o d v cc i oz receiver output leakage current 0.05 1 a 0 d v o d v cc , receivers disabled
xr3160e 4 rs-232/rs-485/rs -422 transceiver with 15kv esd protection rev. 1.0.0 electrical characteristics (continued) u nless otherwise noted : v cc = +3v to +5.5v, c1-c4 = 0.1 f; t a = t min to t max . typical values are at v cc = 3.3v, t a = +25c. s ymbol p arameters m in . t yp . m ax . u nits c onditions rs-232 single-ended receiver inputs (r1in, r2in) v in input voltage range -15 +15 v v il input threshold low 0.6 1.2 v v cc = +3.3v 0.8 1.5 v v cc = +5.0v v ih input threshold high 1.5 2.0 v v cc = +3.3v 1.8 2.4 v v cc = +5.0v v hys input hysteresis 0.5 v r in input resistance 3 5 7 k : v cc +3.0v to 5.5v rs-232 single-ended transmitt er outputs (t1out, t2out) v out output voltage swing 5.0 5.4 v outputs loaded with 3k : to gnd r off output power off impedance 300 10m : v cc = 0v, v out = 2v i sc output short circuit current 30 60 ma v out = 0v i o output leakage current 125 a shdn = 0v, v out = 9v, v cc = 0v or 5.5v
xr3160e 5 rev. 1.0.0 rs-232/rs-485/rs-422 transcei ver with 15kv esd protection electrical characteristics (continued) u nless otherwise noted : v cc = +3v to +5.5v, c1-c4 = 0.1 f; t a = t min to t max . typical values are at v cc = 3.3v, t a = +25c. s ymbol p arameters m in . t yp . m ax . u nits c onditions rs-485/422 differential receiver inputs (a,b) r in receiver input resistance 96 k : -7v d v cm d +12v i in receiver input current 125 a v in = +12v -100 a v in = -7v v th receiver differential threshold voltage -200 -125 -50 mv -7v d v cm d +12v ' v th receiver input hysteresis 30 mv rs-485/422 differential driver outputs (y, z) v od differential driver output 1.5 v cc v r l = 54 : (rs-485), figure 4 1.5 v cc v -7v d v cm d +12v, figure 5 2 v cc v r l = 100 : (rs-422), figure 4 _ ' v od _ change in magnitude of differential output voltage 0.2 v r l = 54 : or 100 : , figure 4 v cm driver common mode output voltage 3 v r l = 54 : or 100 : , figure 4 _ ' v cm _ change in magnitude of common mode output voltage 0.2 v r l = 54 : or 100 : , figure 4 i osd driver output short circuit current 250 ma -7v d v y or v z d +12v, figure 6 i o driver output leakage current 125 a de = 0v or shdn = 0v, v y or v z = -7v or +12v, v cc = 0v or 5.25v
xr3160e 6 rs-232/rs-485/rs -422 transceiver with 15kv esd protection rev. 1.0.0 timing characteristics u nless otherwise noted : v cc = +3v to +5.5v, c1-c4 = 0.1 f; t a = t min to t max . typical values are at v cc = 3.3v, t a = +25c s ymbol p arameters m in . t yp . m ax . u nits c onditions all modes t enable enable from shutdown 1000 ns t shutdown enable to shutdown 1000 ns rs-232, data rate = 250kbps ( slew = 0v), one transmitter switching maximum data rate 250 kbps r l = 3k : , c l = 1000pf t rhl , t rlh receiver propagation delay 100 ns c l = 150pf, figure 7 _ t rhl -t rlh _ receiver propagation delay skew 100 ns t dhl , t dlh driver propagation delay 1400 ns r l = 3k : , c l = 2500pf, figure 8 _ t dhl -t dlh _ driver propagation delay skew 600 ns t shl, t slh transition region slew rate from +3.0v to -3.0v or -3.0v to +3.0v 6 30 v/ s v cc = +3.3v, r l = 3k : to 7k : , c l = 150pf to 2500pf, t a = 25c, figure 8 t shl, t slh transition region slew rate from +3.0v to -3.0v or -3.0v to +3.0v 4 30 v/ s v cc = +3.3v, r l = 3k : to 7k : , c l = 150pf to 2500pf, figure 8 rs-232, data rate = 1mbps ( slew = v cc ), one transmitter switching maximum data rate 1 mbps r l = 3k : , c l = 250pf t rhl , t rlh receiver propagation delay 100 ns c l = 150pf, figure 7 _ t rhl -t rlh _ receiver propagation delay skew 100 ns t dhl , t dlh driver propagation delay 300 ns r l = 3k : , c l = 1000pf, figure 8 _ t dhl -t dlh _ driver propagation delay skew 150 ns t shl, t slh transition region slew rate from +3.0v to -3.0v or -3.0v to +3.0v 13 150 v/ s v cc = +3.3v, r l = 3k : to 7k : , c l = 150pf to 1000pf, figure 8 t shl, t slh transition region slew rate from +3.0v to -3.0v or -3.0v to +3.0v 24 150 v/ s v cc = +3.3v, r l = 3k : to 7k : , c l = 150pf to 1000pf, t a = 25c, figure 8
xr3160e 7 rev. 1.0.0 rs-232/rs-485/rs-422 transcei ver with 15kv esd protection timing characteristics (continued) u nless otherwise noted : v cc = +3v to +5.5v, c1-c4 = 0.1 f; t a = t min to t max . typical values are at v cc = 3.3v, t a = +25c. s ymbol p arameters m in . t yp . m ax . u nits c onditions rs-485/rs-422, data rate = 250kbps ( slew = 0v), one transmitter switching maximum data rate 250 kbps r l = 54 : , c l = 50pf t rphl , t rplh receiver propagation delay 50 150 ns c l = 15pf, figure 9 _ t rphl -t rplh _ receiver propagation delay skew 10 ns t dphl , t dplh driver propagation delay 500 1000 ns r l = 54 : , c l = 50pf, figure 10 _ t dphl -t dplh _ driver propagation delay skew 100 ns t dr, t df driver rise and fall time 300 650 1200 ns t dzh , t dzl driver output enable time 1000 ns r l = 500 : , c l = 50pf, figure 11 t dhz , t dlz driver output disable time 200 ns rs-485/rs-422, data rate = 20mbps ( slew = v cc ), one transmitter switching maximum data rate 20 mbps r l = 54 : , c l = 50pf t rphl , t rplh receiver propagation delay 50 150 ns c l = 15pf, figure 9 _ t rphl -t rplh _ receiver propagation delay skew 10 ns t dphl , t dplh driver propagation delay 30 100 ns r l = 54 : , c l = 50pf, figure 10 _ t dphl -t dplh _ driver propagation delay skew 10 ns t dr, t df driver rise and fall time 10 20 ns t dzh , t dzl driver output enable time 200 ns r l = 500 : , c l = 50pf, figure 11 t dhz , t dlz driver output disable time 200 ns
xr3160e 8 rs-232/rs-485/rs -422 transceiver with 15kv esd protection rev. 1.0.0 pin descriptions pin name rs-232 rs-485 full duplex rs-485 half duplex 1 c1+ charge pump cap 1 positive lead, 0.1 f 2 vcc main supply, v cc = +3.0v to +5.5v, bypa ss to ground with 1.0 f 3 c1- charge pump cap 1 negative lead 4 gnd ground 5 t1out, b/z transmitter 1 output z driver neg output b/z neg input/output 6 t2out, a/y transmitter 2 output y driver pos output a/y pos input/output 7 r1out receiver 1 output x x 8 r2out, ro receiver 2 output receiver ttl output receiver ttl output 9 shdn low power shutdown mode when low 10 slew data rate limited to 250kbps when low 11 rs-485/ rs-232 0 1 1 12 half/ full x 0 1 13 r2in, a receiver 2 input a pos receiver input x 14 r1in, b receiver 1 input b neg receiver input x 15 t2in, de transmitter 2 input driver enabled when high 16 t1in, di transmitter 1 input driver ttl input 17 v- charge pump negative supply, 0.1 f from ground 18 c2- charge pump cap 2 negative lead 19 c2+ charge pump cap 2 positive lead, 0.1 f 20 v+ charge pump positive supply, 0.1 f to ground
xr3160e 9 rev. 1.0.0 rs-232/rs-485/rs-422 transcei ver with 15kv esd protection suggested db9 connector pinout db9 pin rs-232 rs-485 full duplex rs-485 half duplex 1 2 rxd rx+ 3 txd tx- data- 4 5 ground 6 7 rts tx+ data+ 8 cts rx- 9
xr3160e 10 rs-232/rs-485/rs -422 transceiver with 15kv esd protection rev. 1.0.0 block diagrams f igure 1. rs-232 m ode t1out t2out r1out r2out 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 c2 0.1f c3 0.1f cc 1.0f t2 r1 r2 t1 c4 0.1f c1 0.1f c1+ v cc c1- gnd _____ shdn _____ slew v+ c2+ c2- v- ______ rs-485/rs-232 t1in t2in r1in r2in xr3160 20 pin ssop rs-232 5k " 5k "
xr3160e 11 rev. 1.0.0 rs-232/rs-485/rs-422 transcei ver with 15kv esd protection f igure 2. rs-485/422 f ull d uplex m ode r d z y ro 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 c1+ v cc c1- gnd _____ shdn _____ slew v+ c2+ c2- v- ____ half/full ______ rs-485/rs-232 di de b a c2 0.1f c3 0.1f cc 1.0f c4 0.1f c1 0.1f xr3160 20 pin ssop rs-485 full duplex
xr3160e 12 rs-232/rs-485/rs -422 transceiver with 15kv esd protection rev. 1.0.0 f igure 3. rs-485 h alf d uplex m ode r d b/z a/y ro 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 c1+ v cc c1- gnd _____ shdn _____ slew v+ c2+ c2- v- ___ half/full ______ rs-485/rs-232 di de c2 0.1f c3 0.1f cc 1.0f c4 0.1f c1 0.1f xr3160 20 pin ssop rs-485 half duplex
xr3160e 13 rev. 1.0.0 rs-232/rs-485/rs-422 transcei ver with 15kv esd protection test circuits f igure 4. rs-485/422 d ifferential d river o utput v oltage f igure 5. rs-485/422 d ifferential d river o utput v oltage over c ommon m ode f igure 6. rs-485/422 d river o utput s hort c ircuit c urrent d v od v cm de = v cc di = 0v or v cc z y r l 2 r l 2 d v od v cm 60 ? 375 ? 375 ? z y de = v cc di = 0v or v cc d -7v to +12v v z y i osd de = 0v or v cc di = 0v or v cc
xr3160e 14 rs-232/rs-485/rs -422 transceiver with 15kv esd protection rev. 1.0.0 f igure 7. rs-232 r eceiver p ropagation d elay c l rx v in v out +3v -3v v oh v ol t rhl t rlh v in v out 1.5v 1.5v 1.5v 1.5v
xr3160e 15 rev. 1.0.0 rs-232/rs-485/rs-422 transcei ver with 15kv esd protection f igure 8. rs-232 d river p ropagation d elay r l c l tx v in v out 3v 0v +3v -3v t shl t slh v in v out t dhl 1.5v 0v 0v t dlh 1.5v
xr3160e 16 rs-232/rs-485/rs -422 transceiver with 15kv esd protection rev. 1.0.0 f igure 9. rs-485/422 r eceiver p ropagation d elay the re control is internally fixed to 0v in the rs-485/422 modes (receiver always on). c l b a r re = 0v ro b a ro 1.5v t rplh t rphl +1v 0v -1v v oh v ol 1.5v
xr3160e 17 rev. 1.0.0 rs-232/rs-485/rs-422 transcei ver with 15kv esd protection f igure 10. rs-485/422 d river p ropagation d elay and r ise /f all t imes d v od r l c l z y de = v cc di 3v 0v z y v od+ 0v v od- v od 1.5v 90% 10% 90% 10% t dr t df 1.5v t dplh t dphl di v od (v y -v z ) t skew = |t dphl t dplh |
xr3160e 18 rs-232/rs-485/rs -422 transceiver with 15kv esd protection rev. 1.0.0 f igure 11. rs-485/422 d river o utput e nable /d isable t imes r l c l d testing z: di = 0v testing y: di = v cc de z y v out 3v 0v v oh v ol de v out v oh +v ol 2 v oh - 0.25v 1.5v 1.5v t dzh t dhz r l c l d de v cc z y v out testing z: di = v cc testing y: di = 0v 3v 0v v oh v ol 1.5v 1.5v t dzl t dlz de v out v oh +v ol 2 v ol + 0.25v
xr3160e 19 rev. 1.0.0 rs-232/rs-485/rs-422 transcei ver with 15kv esd protection product summary the xr3160 is an advanced multiprotocol transceiver supporting rs-232, rs-485, and rs-422 serial standards. full operation requires only four external charge pump capacitors. enhanced failsafe the enhanced failsafe feature of the xr3160 guarantees a logic-high receiver output when the receiver inputs are open, shorted, or terminated but idle/undriven. the enhanced failsafe interprets 0v differential as a logic high with a minimum 50mv noise margin, while maintaining compliance with the eia/tia-485 standard of 200mv. no external biasing resistors are required, further easing the usage of multiple protocols over a single connector. 15kv esd protection esd protection structures are incorporated on all pins to protect against electrostatic discharges encountered during handling and assembly. the bus pins (driver outputs and receiver inputs) have extra protection structures, which have been tested up to 15kv without damage. these structures withstand high esd in all states: normal operation, in shutdown, and when powered off. esd protection is be tested in various ways. exar uses the following methods to qualify the protection structures designed into xr3160: 8kv using iec 61000-4-2 contact discharge 15kv using iec 61000-4-2 airgap discharge 15kv using the human body model (hbm) the iec 61000-4-2 standard is more rigorous than hb m, resulting in lower volt age levels compared with hbm for the same level of esd protection. because iec 61000-4-2 specifies a lower series resistance, the peak current is higher than hbm. the xr3160 has passed both hbm and iec 61000-4-2 testing without damage.
xr3160e 20 rs-232/rs-485/rs -422 transceiver with 15kv esd protection rev. 1.0.0 truth tables t able 1: rs-232 tx t ruth t able inputs outputs shdn rs-485/ rs-232 di/t1in, de/t2in z(b)/t1out, y(a)/t2out 0 x x 1/8th unit load 1 0 0 1 1 0 1 0 1 1 x rs-485 mode t able 2: rs-232 rx t ruth t able inputs outputs shdn rs-485/ rs-232 b/r1in, a/r2in r1out, ro/r2out x 0 0 1 x 0 1 0 x 0 inputs open 1 x 1 x r1out high-z, ro/r2out in rs-485 mode
xr3160e 21 rev. 1.0.0 rs-232/rs-485/rs-422 transcei ver with 15kv esd protection * y and z correspond to pins 6 and 5. a and b correspond to pins 13 and 14. t able 3: rs-485/422 tx t ruth t able inputs outputs shdn rs-485/ rs-232 de/t2in di/t1in z(b)/t1out y(a)/t2out 0 x x x 1/8th unit load 1/8th unit load 1 1 0 x 1/8th unit load 1/8th unit load 1 1 1 0 1 0 1 1 1 1 0 1 x 0 x x rs-232 mode t able 4: rs-485/422 rx t ruth t able inputs output rs-485/ rs-232 shdn half/ full (a-b) (y-z) ro/r2out 1 0 x x x high-z 1 1 0 t -50mv x 1 1 1 0 d -200mv x 0 1 1 0 floating x 1 1 1 1 x t -50mv 1 1 1 1 x d -200mv 0 1 1 1 x floating 1 0 x x x x rs-232 mode
xr3160e 22 rs-232/rs-485/rs -422 transceiver with 15kv esd protection rev. 1.0.0 package drawings f igure 12. ssop 20
23 notice exar corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. exar corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. charts and schedules contained here in are only for illustration purposes and may vary depending upon a users specific application. while the information in this publication has been carefully checked; no responsibilit y, however, is assumed for inaccuracies. exar corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product ca n reasonably be expected to cause failure of the life support syst em or to significantly affect its safety or effectiveness. products are not authorized for use in such applications unless exar corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liabilit y of exar corporation is adequately protected under the circumstances. copyright 2013 exar corporation datasheet sept 2013. for technical support please email exars serial technical support group at: serialtechsupport@exar.com . reproduction, in part or whole, without the prior written consent of exar corporation is prohibited. xr3160e rev. 1.0.0 rs-232/rs-485/rs-422 transcei ver with 15kv esd protection revision history d ate r evision d escription sept 2013 1.0.0 production release

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