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general description the max14782e is a 3.3v to 5v esd-protected trans - ceiver intended for half-duplex rs-485/rs-422 com - munication up to 500kbps. the device is optimized for extended cable runs while maximizing tolerance to noise. the max14782e integrated protection features include short-circuit-protected outputs, hot-swap functionality, and a true fail-safe receiver, guaranteeing a logic-high receiver output when inputs are shorted or open. hot- swap capability eliminates undesired transitions on the bus during power-up or hot insertion. the transceiver draws 1.9ma (typ) supply current when unloaded or when fully loaded with the drivers disabled and draws less than 10a (max) of supply current in low- power shutdown mode. the max14782e is available in 8-pin max?, 8-pin so, and small, 8-pin (3mm x 3mm) tdfn-ep packages. all packages operate over the -40c to +125c temperature range. applications motion controllers field bus networks encoder interfaces backplane buses benefts and features integrated protection increases robustness ? high esd protection 35kv hbm esd 20kv air gap iec 61000-4-2 esd 12kv contact iec 61000-4-2 esd ? short-circuit-protected outputs ? true fail-safe receiver ? hot-swap capability 3v to 5.5v supply voltage range data rates up to 500kbps -40c to +125c operating temperature allows up to 32 transceivers on the bus low 10a (max) shutdown current saves board space ? available in 8-pin max, so, and tdfn-ep packages +denotes lead(pb)-free/rohs-compliant package. *ep = exposed paddle. part supply range data rate (max) temp range pin-package max14782easa+ 3.0v to 5.5v 500kbps -40c to +125c 8 so max14782eata+ 3.0v to 5.5v 500kbps -40c to +125c 8 tdfn-ep* MAX14782EAUA+ 3.0v to 5.5v 500kbps -40c to +125c 8 max max is a registered trademark of maxim integrated products, inc. 19-6776; rev 0; 8/13 ordering information/selector guide evaluation kit available max14782e 500kbps 3.3v to 5v rs-485/rs-422 transceiver with 35kv hbm esd protection
(voltages referenced to gnd.) v cc ..................................................................... -0.3v to +6.0v ro ............................................................ -0.3v to (v cc + 0.3v) re, de, di ............................................................ -0.3v to +6.0v a, b (v cc 3.6v) ............................................. -8.0v to +13.0v a, b (v cc < 3.6v) ............................................. -9.0v to +13.0v short-circuit duration (ro, a, b) to gnd ................. continuous operating temperature range max14782ea_ ............................................. -40c to +125c junction temperature ...................................................... +150c storage temperature range ............................ -65c to +150c continuous power dissipation (t a = +70c) so (derate at 7.6mw/c above +70c) ...................... 606mw tdfn-ep (derate at 24.4mw/c above +70c) ........ 1951mw max (derate at 4.8mw/c above +70c)..................387mw lead temperature (soldering, 10s) ................................. +300oc soldering temperature (reflow) ...................................... +260 c junction-to-case thermal resistance ( jc ) so ................................................................................ 38c/w tdfn-ep ....................................................................... 8c/w max............................................................................42c/w junction-to-ambient thermal resistance ( ja ) so .............................................................................. 132c/w tdfn-ep ..................................................................... 41c/w max..........................................................................206c/w (note 1) (v cc = +3.0v to +5.5v, t a = t min to t max , unless otherwise specified. typical values are at v cc = +5v and t a = +25c.) (notes 2, 3) parameter symbol conditions min typ max units power supply supply voltage v cc 3.0 5.5 v supply current i cc de = v cc , re = gnd, no load 1.9 4 ma shutdown supply current i shdn de = gnd, re = v cc 10 a driver differential driver output v od v cc = 4.5v, r l = 54, figure 1 2.1 v v cc = 3v, r l = 100, figure 1 2.0 v cc = 3v, r l = 54, figure 1 1.5 change in magnitude of differential output voltage v od r l = 54 or 100, figure 1 (note 4) -0.2 0 +0.2 v driver common-mode output voltage v oc r l = 54 or 100, figure 1 v cc / 2 3 v change in magnitude of common- mode voltage v oc r l = 54 or 100, figure 1 (note 4) -0.2 +0.2 v single-ended driver output high v oh a or b output, i a or b = -20ma 2.2 v single-ended driver output low v ol a or b output, i a or b = 20ma 0.8 v differential output capacitance c od de = re = v cc , f = 4mhz 12 pf driver short-circuit output current |i ost | 0 v out +12v, output low 250 ma -7v v out v cc , output high 250 maxim integrated 2 note 1: package thermal resistances were obtained using the method described in jedec specification jesd51-7, using a four-layer board. for detailed information on package thermal considerations, refer to zzzpdphjdhgfrphpdoxrdo . evroxh0dpxp5djv stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to ab solute maximum rating conditions for extended periods may affect device reliability. 3dfndh7hpdddfwhlwlf (hfwlfdddfwhlwlf max14782e 500kbps 3.3v to 5v rs-485/rs-422 transceiver with 35kv hbm esd protection www.maximintegrated.com
(v cc = +3.0v to +5.5v, t a = t min to t max , unless otherwise specified. typical values are at v cc = +5v and t a = +25c.) (notes 2, 3) parameter symbol conditions min typ max units receiver input current i a, b de = gnd, v cc = gnd or +5.5v v in = +12v 400 1000 a v in = -7v -800 +300 differential input capacitance c a, b between a and b, de = gnd, f = 4mhz 12 pf receiver differential threshold voltage v th -7v v cm +12v -200 -105 -10 mv receiver input hysteresis v th v cm = 0v 10 mv receiver input resistance r in -7v v cm +12v 12 k logic interface (di, de, re, ro) input-voltage high v ih de, di, 2.0 v input-voltage low v il de, di, 0.8 v input hysteresis v hys de, di, 50 mv input current i in de, di, 1 a input impedance on first transition de, re 1 10 k ro output-voltage high v ohro re = gnd, i ro = -2ma, (v a - v b ) > 200mv v cc - 1.5 v ro output-voltage low v olro = gnd, i ro = 2ma, (v a - v b ) < -200mv 0.4 v receiver three-state output current i ozr re = v cc , 0 v ro v cc 1 a receiver output short-circuit current i osr 0 v ro v cc 110 ma protection thermal-shutdown threshold t shdn temperature rising +160 c thermal-shutdown hysteresis 15 c esd protection on a and b pins iec 61000-4-2 air-gap discharge to gnd 20 kv iec 61000-4-2 contact discharge to gnd 12 human body model 35 esd protection, all other pins human body model 2 kv maxim integrated 3 electrical characteristics (continued) max14782e 500kbps 3.3v to 5v rs-485/rs-422 transceiver with 35kv hbm esd protection www.maximintegrated.com
(v cc = +3v to +5.5v, t a = t min to t max , unless otherwise specified. typical values are at v cc = +5v and t a = +25c.) (notes 2, 3, 5) parameter symbol conditions min typ max units driver driver propagation delay t dplh r l = 54, c l = 50pf, figures 2 and 3 20 ns t dphl 20 driver differential output rise or fall time t hl , t lh r l = 54, c l = 50pf, figures 2 and 3 200 600 ns differential driver output skew |t dplh - t dphl | t dskew r l = 54, c l = 50pf, figures 2 and 3 140 ns maximum data rate dr max 500 kbps driver enable to output high t dzh r l = 110, c l = 50pf, figures 4 and 5 (note 6) 2500 ns driver enable to output low t dzl r l = 110, c l = 50pf, figures 4 and 5 (note 6) 2500 ns driver disable time from low t dlz r l = 110, c l = 50pf, figures 4 and 5 100 ns driver disable time from high t dhz r l = 110, c l = 50pf, figures 4 and 5 100 ns driver enable from shutdown to output high t dlz(shdn) r l = 110, c l = 15pf, figures 4 and 5 (note 6) 5.5 s maxim integrated 4 switching characteristics max14782e 500kbps 3.3v to 5v rs-485/rs-422 transceiver with 35kv hbm esd protection www.maximintegrated.com
(v cc = +3v to +5.5v, t a = t min to t max , unless otherwise specified. typical values are at v cc = +5v and t a = +25c.) (notes 2, 3, 5) note 2: all devices 100% production tested at t a = +25c. specifications over temperature are guaranteed by design. note 3: all currents into the device are positive; all currents out of the device are negative. all voltages are referenced to ground, unless otherwise noted. note 4: v od and v oc are the changes in v od and v oc , respectively, when the di input changes state. note 5: capacitive load includes test probe and fixture capacitance. note 6: guaranteed by design; not production tested. note 7: the timing parameter refers to the driver or receiver enable delay , when the device has exited the initial hot-swap protect state and is in normal operating mode. parameter symbol conditions min typ max units driver enable from shutdown to output low t dhz(shdn) r l = 110, c l = 15pf, figures 4 and 5 (note 6) 5.5 s time to shutdown t shdn (note 7) 50 340 700 ns receiver receiver propagation delay t rplh c l = 15pf, figures 6 and 7 200 ns t rphl 200 receiver output skew t rskew c l = 15pf, figures 6 and 7 (note 6) 30 ns maximum data rate dr max 500 kbps receiver enable to output high t rzh r l = 1k, c l = 15pf, figure 8 (note 6) 50 ns receiver enable to output low t rzl r l = 1k, c l = 15pf, figure 8 (note 6) 50 ns receiver disable time from low t rlz r l = 1k, c l = 15pf, figure 8 50 ns receiver disable time from high t rhz r l = 1k, c l = 15pf, figure 8 50 ns receiver enable from shutdown to output high t rlz(shdn) r l = 1k, c l = 15pf, figure 8 (note 6) 5.5 s receiver enable from shutdown to output low t rhz(shdn) r l = 1k, c l = 15pf, figure 8 (note 6) 5.5 s time to shutdown t shdn (note 7) 50 340 700 ns maxim integrated 5 switching characteristics max14782e (continued) max14782e 500kbps 3.3v to 5v rs-485/rs-422 transceiver with 35kv hbm esd protection www.maximintegrated.com
figure 1. driver dc test load figure 2. driver timing test circuit figure 3. driver propagation delays v od a b v oc r l 2 r l 2 r l c l v od v cc di de a b 1.5v 1.5v t dphl t dplh v od 0 b a di 10% 90% 10% 90% 0 -v o v od t dskew = | t dplh - t dphl | v od = [v a - v b ] v cc v o f = 1mhz, t lh = 3ns, t hl = 3ns t lh t hl maxim integrated 6 test and timing diagrams max14782e 500kbps 3.3v to 5v rs-485/rs-422 transceiver with 35kv hbm esd protection www.maximintegrated.com
figure 4. driver enable and disable times (t dhz , t dzh ) figure 5. driver enable and disable times (t dzl , t dzl ) figure 6. receiver propagation delay test circuit 0 0 0.25v 1.5v t dzh , t dzh(shdn) t dhz de v cc v oh 1.5v out r l = 110? 50? out s1 a b d di gnd or v cc generator de c l 50pf r l = 110? 50? out s1 a b d di 0 or v cc v cc generator de 0 0.25v 1.5v t dzl , t dzl(shdn) t dlz de v cc 1.5v v cc out v ol v id b a ro ate r 0d[lp ,qwhjudwhg g 7 max14782e 500kbps 3.3v to 5v rs-485/rs-422 transceiver with 35kv hbm esd protection www.maximintegrated.com
figure 8. receiver enable and disable times figure 7. receiver propagation delays generator 50? r 1k? c l 15pf r -1.5v +1.5v ro s1 v cc s2 s3 v id re re ro re ro re re ro ro 0 t rhz t rlz 0.25v 0.25v 1.5v 1.5v 0 0 2 s1 open s2 closed s3 = +1.5v s1 open s2 closed s3 = +1.5v s1 closed s2 open s3 = -1.5v s1 closed s2 open s3 = -1.5v v oh 0 0 v oh v cc v cc v cc 1.5v 1.5v v cc t rzl , t rzl(shdn) v ol 0 v cc v cc v cc v ol t rzh, t rzh(shdn) 2 v cc a b v oh v ol ro t rphl 1.5v 1.5v t rskew = |t rphl - t rplh | t rplh -1v 1v maxim integrated max14782e 500kbps 3.3v to 5v rs-485/rs-422 transceiver with 35kv hbm esd protection www.maximintegrated.com
(v cc = +5v, t a = +25c, unless otherwise specified.) no-load supply current vs. temperature max14782e toc01 temperature (c) supply curent (ma) 110 95 80 65 50 35 20 5 -10 -25 0.5 1.0 1.5 2.0 2.5 3.0 0 -40 125 de = v cc re = gnd v cc = 3.3v v cc = 5v shutdown supply current vs. temperature max14782e toc02 temperature (c) supply curent ( a) 110 95 80 65 50 35 20 5 -10 -25 3 2 1 4 5 6 7 8 9 10 0 -40 125 de = gnd re = v cc v cc = 3.3v v cc = 5v supply current vs. data rate max14782e toc03 data rate (kbps) supply current (ma) 400 200 300 100 20 10 30 40 60 50 70 80 0 0 500 de = v cc v cc = 5v, 54 load v cc = 3.3v, 54 load v cc = 5v, no load v cc = 3.3v, no load receiver-output high voltage vs. output current max14782e toc04 output current (ma) output high voltage (v) -50 -40 -30 -20 -10 1 2 3 4 5 0 0 -60 output sourcing current v cc = 3.3v v cc = 5v receiver-output low voltage vs. output current max14782e toc05 output current (ma) output low voltage (v) 50 40 30 20 10 1 2 3 4 5 0 0 60 output sinking current v cc = 3.3v v cc = 5v driver output current vs. differential output voltage max14782e toc06 differential output voltage (v) driver output current (ma) 4 3 2 1 40 80 120 160 0 0 5 v cc = 3.3v v cc = 5v differential driver output voltage vs. temperature max14782e toc07 temperature (c) differential driver output voltage (v) 110 95 80 65 50 35 20 5 -10 -25 1.5 1.0 0.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0 -40 125 r l = 54 c l = 50pf v cc = 3.3v v cc = 5v driver output current vs. output high voltage max14782e toc08 output high voltage (v) output current (ma) 4 3 1 2 -5 -4 -3 -2 -1 0 -6 -20 -40 -60 -80 -100 -120 -140 -160 -180 0 -7 5 v cc = 3.3v v cc = 5v 0d[lp ,qwhjudwhg g 9 7sfdo2shdjddfhvfv max14782e 500kbps 3.3v to 5v rs-485/rs-422 transceiver with 35kv hbm esd protection www.maximintegrated.com
(v cc = +5v, t a = +25c, unless otherwise specified.) driver output current vs. output low voltage max14782e toc09 output low voltage (v) driver output curent (ma) 10 8 6 4 2 20 40 60 80 100 120 140 160 180 0 0 12 v cc = 3.3v v cc = 5v driver propagation delay vs. temperature max14782e toc10 temperature (c) propagation delay (ns) 1109580655035205-10-25 250 300 350 400 450 500 550 600 200 -40 125 r l = 54 c l = 50pf t dphl , v cc = 5v t dplh , v cc = 5v t dphl , v cc = 3.3v t dplh , v cc = 3.3v differential driver skew vs. temperature max14782e toc11 temperature (c) driver differential skew (ns) 110 95 80 65 50 35 20 5 -10 -25 6 4 2 8 10 12 14 16 18 20 0 -40 125 v cc = 3.3v v cc = 5v r l = 54 c l = 50pf driver-output rise /fall time vs. temperature max14782e toc12 temperature (c) driver-output rise/fall time (ns) 110 95 80 65 50 35 20 5 -10 -25 200 100 300 400 500 600 0 -40 125 r l = 54 c l = 50pf t hl , v cc = 3.3v t lh , v cc = 5v t hl , v cc = 5v t lh , v cc = 3.3v driver-output transition skew vs. temperature max14782e toc13 temperature (c) driver-output transition skew (ns) 110 95 80 65 50 35 20 5 -10 -25 0.5 1.0 1.5 2.0 2.5 3.0 0 -40 125 v cc = 3.3v v cc = 5v r l = 54 c l = 50pf receiver propagation delay vs. temperature max14782e toc14 temperature (c) propagation delay (ns) 110 95 80 65 50 35 20 5 -10 -25 60 40 20 80 100 120 140 160 180 200 0 -40 125 c l = 15pf t rplh , v cc = 3.3v t rphl , v cc = 5v t rphl , v cc = 3.3v t rplh , v cc = 5v driver/receiver propagation delay max14782e toc15 400ns/div 2v/div 2v/div 2v/div di a /b ro v cc = 3.3v c l = 8pf differential input capacitance vs. frequency max14782e toc16 frequency (mhz) capacitance (pf) 3 10 20 30 0 0 30 de = gnd 0d[lp ,qwhjudwhg g 10 7sfdo2shdjddfhvfvfrxhg max14782e 500kbps 3.3v to 5v rs-485/rs-422 transceiver with 35kv hbm esd protection www.maximintegrated.com
*ep *connect exposed pad (ep) to gnd 1 3 4 + 8 6 5 v cc a gnd 2 7 b ro de di re tdfn-ep top view v cc b a gnd 8 7 6 5 1 2 3 4 ro re de di max14782e max14782e max/so + pin name function 1 ro receiver output. see function tables . 2 re receiver output enable. drive re low to enable ro. drive re high to disable the receiver. ro is high impedance when re is high. drive re high and pull de low to enter low-power shutdown mode. 3 de driver output enable. drive de high to enable the driver. drive de low to disable the driver. driver outputs are high-impedance when the driver is disabled. drive re high and pull de low to enter low- power shutdown mode. 4 di driver input. with de high, a low on di forces the a output low and the b output high. similarly , a high on di forces the a output high and b output low . 5 gnd ground 6 a noninverting rs-485/rs-422 receiver input and driver output 7 b inverting rs-485/rs-422 receiver input and driver output 8 v cc positive supply voltage input. bypass v cc with a 0.1f ceramic capacitor to ground. ep exposed pad (tdfn only). connect ep to gnd. maxim integrated 11 pin description pin confguration max14782e 500kbps 3.3v to 5v rs-485/rs-422 transceiver with 35kv hbm esd protection www.maximintegrated.com
r d shutdown ro re de di a b v cc gnd max14782e x = dont care transmitting inputs outputs mode re de di b a x 1 1 0 1 active x 1 0 1 0 active 0 0 x high impedance driver disabled 1 0 x high impedance shutdown receiving inputs outputs mode re de a-b ro 0 x -10mv 1 active 0 x -200mv 0 active 0 x open/shorted 1 active 1 1 x high impedance receiver disabled 1 0 x high impedance shutdown maxim integrated 12 function tables functional diagram max14782e 500kbps 3.3v to 5v rs-485/rs-422 transceiver with 35kv hbm esd protection www.maximintegrated.com
detailed description the max14782e is a 3.3v to 5v esd-protected rs-485/ rs-422 transceiver intended for high-speed, half-duplex communications. integrated hot-swap functionality elimi - nates false transitions on the bus during power-up or hot insertion. the device features fail-safe receiver inputs guaranteeing a logic-high receiver output when inputs are shorted or open. the ic has a 1-unit load receiver input impedance, allowing up to 32 transceivers on the bus. true fail safe the max14782e 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. if the differential receiver input voltage (aCb) is greater than or equal to -10mv, ro is logic-high. driver single-ended operation the a and b outputs can either be used in the standard differential operating mode, or can be used as single- ended outputs. since the a and b driver outputs swing rail-to-rail, they can individually be used as standard ttl logic outputs. hot-swap capability hot-swap inputs when circuit boards are inserted in a hot or powered backplane, disturbances on the enable inputs and dif - ferential receiver inputs can lead to data errors. upon initial circuit board insertion, the processor undergoes its power-up sequence. during this period, the processor output drivers are high impedance and are unable to drive the de and re inputs of the max14782e to a defined logic level. leakage currents up to 10a from the high- impedance outputs of a controller could cause de and re to drift to an incorrect logic state. additionally, parasitic circuit board capacitance could cause coupling of v cc or gnd to de and re . these factors could improperly enable the driver or receiver. the max14782e features integrated hot-swap inputs that help to avoid these poten - tial problems. 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 inputs. hot-swap input circuitry the de and re enable inputs feature hot-swap capabil- ity. at the input, there are two nmos devices, m1 and m2 (figure 9). when v cc ramps from 0v, an internal 10s timer turns on m2 and sets the sr latch that also turns figure 9. simplified structure of the driver enable (de) pin v cc timer de timer 5k? (typ) 10s 100a 500a m2 m1 driver enable (hot swap) maxim integrated 13 max14782e 500kbps 3.3v to 5v rs-485/rs-422 transceiver with 35kv hbm esd protection www.maximintegrated.com
on m1. transistors m2 (a 500a current sink) and m1 (a 100a current sink) pull de to gnd through a 5k (typ) 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 10s, 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. a complementary circuit employing two pmos devices pulls re to v cc . 35kv esd protection esd protection structures are incorporated on all pins to protect against electrostatic discharges encountered during handling and assembly. the driver outputs and receiver inputs of the max14782e have extra protection against static electricity. the esd structures withstand high esd in all states: normal operation, shutdown, and powered down. after an esd event, the max14782e keeps working without latch-up or damage. esd protection can be tested in various ways. the trans - mitter outputs and receiver inputs of the max14782e are characterized for protection to the following limits: 35kv hbm 20kv using the air-gap discharge method specified in iec 61000-4-2 12kv 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 (hbm) figure 10 shows the hbm, and figure 11 shows the cur - rent waveform it generates when discharged into a low- impedance state. this model consists of a 100pf capaci - tor 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 per - formance of finished equipment. however, it does not spe - cifically refer to integrated circuits. the max14782e helps in designing equipment to meet iec 61000-4-2 without the need for additional esd protection components. the major difference between tests done using the hbm 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 withstand voltage measured to iec 61000-4-2 is generally lower than that measured using the hbm. figure 10. human body esd test model figure 11. human body current waveform 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 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 maxim integrated 14 max14782e 500kbps 3.3v to 5v rs-485/rs-422 transceiver with 35kv hbm esd protection www.maximintegrated.com
figure 12 shows the iec 61000-4-2 model, and figure 13 shows the current waveform for iec 61000-4-2 esd contact discharge test. applications information driver output protection two mechanisms prevent excessive output current and power dissipation caused by faults or by bus connec - tion. the first, a current limit on the output stage provides immediate protection against short circuits over the whole common-mode voltage range. the second, a thermal-shut - down circuit, forces the driver outputs into a high-imped - ance state if the die temperature exceeds +160c (typ). low-power shutdown mode low-power shutdown mode is initiated by bringing re high and de low. in shutdown, the devices draw less than 10a of supply current. re and de can be connected together and driven simul- taneously. the max14782e is 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 800ns (max), the device is guaranteed to enter shutdown. typical applications the max14782e transceiver is designed for bidirectional data communications on multipoint bus transmission lines. figure 14 shows a typical network application cir - cuit. to minimize reflections, terminate the line at both ends with its characteristic impedance and keep stub lengths off the main line as short as possible. figure 12. iec 61000-4-2 esd test model figure 14. typical half-duplex rs-485 network figure 13. ied 61000-4-2 esd generator 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 di ro de a b ro ro ro di di di de de de d d d r r r b b b a a a 120 ? 120 ? d r re re re re max14782e t r = 0.7ns to 1ns 30ns 60ns t 100% 90% 10% i peak i maxim integrated 15 max14782e 500kbps 3.3v to 5v rs-485/rs-422 transceiver with 35kv hbm esd protection www.maximintegrated.com
package type package code outline no. land pattern no. 8 so s8+4 21-0041 90-0096 8 tdfn-ep t833+2 21-0137 90-0059 8 max u8+1 21-0036 90-0092 maxim integrated 16 package information for the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages . note that a +, #, or - in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status. chip information process: bicmos max14782e 500kbps 3.3v to 5v rs-485/rs-422 transceiver with 35kv hbm esd protection www.maximintegrated.com
revision number revision date description pages changed 0 8/13 initial release ? 2013 maxim integrated products, inc. 17 revision history maxim integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim integrated product. no circuit patent licenses are implied. maxim integrated reserves the right to change the circuitry and specifcations without notice at any time. the parametric values (min and max limits) shown in the electrical characteristics table are guaranteed. other parametric values quoted in this data sheet are provided for guidance. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. max14782e 500kbps 3.3v to 5v rs-485/rs-422 transceiver with 35kv hbm esd protection for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com.

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