unisonic technologies co., ltd 75185 linear integrated circuit www.unisonic.com.tw 1 of 10 copyright ? 2014 unisonic technologies co., ltd qw-r113-003.g multiple rs-232 drivers and receivers ? description the utc 75185 complies with the requirements of the tia/eia232-f and itu (formerl y ccitt) v.28 standards. these standards are for data interchange between a host computer and peripheral at signaling rates up to 20kbit/s. the switching speeds of the utc 75185 are fast enough to support rates up to 120kbite/s with lower capacitive loads (shorter cables). interoperability at the higher signaling rates cannot be assured unless the designer has design control of the c able and the interface circuits at both ends. for interoperability at signaling rates to 120kbit/s, use of ita/eia-423-b (itu v.10) and ti a/eia-422-b (itu v.11) standards are recommended. sop-20 dip-20 tssop-20 ssop-20 ? features *single chip with easy interface between uart and serial-port connector of pc. *three drivers and five receivers meet or exceed the requirements of tia/eia- 232-f and itu v.28 standards. *designed to support data rates up to 120 kbps ? ordering information ordering number package packing lead free halogen free 75185l-d20-t 75185g-d20-t dip-20 tube - 75185g-p20-r tssop-20 tape reel - 75185g-r20-r ssop-20 tape reel - 75185g-s20-r sop-20 tape reel ? marking dip-20 tssop-20 / ssop-20 / sop-20
75185 linear integrated circuit unisonic technologies co., ltd 2 of 10 www.unisonic.com.tw qw-r113-003.g ? pin configurations 2 1 20 19 18 17 16 15 14 13 12 11 5 6 7 8 9 10 4 3 v dd ra1 ra2 ra3 dy1 dy2 ra4 dy3 ra5 v ss v cc ry1 ry2 ry3 da1 da2 ry4 da3 ry5 gnd ? pin description pin no symbol pin description 1 v dd supply voltage 2 ra1 first receiver input 3 ra2 second receiver input 4 ra3 third receiver input 5 dy1 first driver output 6 dy2 second driver output 7 ra4 fourth receiver input 8 dy3 third driver output 9 ra5 fifth receiver input 10 v ss supply voltage 11 gnd ground 12 ry5 fifth receiver output 13 da3 third driver input 14 ry4 fourth receiver output 15 da2 second driver input 16 da1 first driver input 17 ry3 third receiver output 18 ry2 second receiver output 19 ry1 first receiver output 20 v cc supply voltage
75185 linear integrated circuit unisonic technologies co., ltd 3 of 10 www.unisonic.com.tw qw-r113-003.g ? absolute maximum ratings over o perating free-air temperature range (unless otherwise specified) parameter symbol ratings unit supply voltage (note 1) v dd 15 v v ss -15 v v cc 10 v input voltage range drive v in -15 ~ 7 v receiver -30 ~ 30 v driver output voltage range v out -15~ 15 v receiver low level output current i out 20 ma storage temperature range t stg -65 ~ +150 ? c ? thermal data parameter symbol ratings unit junction to ambient dip-20 ja 70 ? c/w sop-20 100 ssop-20 115 tssop-20 115 notes: 1. all voltage are with respect to the network ground terminal. 2. the package thermal impedance is calculated in ac cordance with jesd 51, except for through-hole packages, which use a trace length of zero. ? recommended operating conditions parameter symbol min typ max unit supply voltage v dd 7.5 9 15 v v ss -7.5 -9 -15 v v cc 4.5 5 5.5 v input voltage (driver only) high level v ih 1.9 v low level v il 0.8 v high level output current drive i oh -6.0 ma receiver -0.5 low level output current drive i ol 6 ma receiver 16 operating free-air temperature t a 0 70 ? c ? supply currents parameter symbol test conditions min max unit v dd v ss supply current from v dd i dd no load. all inputs at 1.9v 9 -9 15 ma 12 -12 19 15 -15 25 ma no load. all inputs at 0.8v 9 -9 4.5 12 -12 5.5 15 -15 9 supply current from v ss i ss no load. all inputs at 1.9v 9 -9 -15 ma 12 -12 -19 15 -15 -25 no load. all inputs at 0.8v 9 -9 -3.2 ma 12 -12 -3.2 15 -15 -3.2 supply current from v cc i cc no load. all inputs at 5v, v cc =5v 30 ma
75185 linear integrated circuit unisonic technologies co., ltd 4 of 10 www.unisonic.com.tw qw-r113-003.g ? driver electrical characteristics over recommended operating free-air temperature range (v dd =9v, v ss =-9v, v cc =5v, unless otherwise specified) parameter symbol test conditions min typ max unit high level output voltage v oh v il =0.8v, r l =3 k ? (figure 1) 6 7.5 v low level output voltage (note 3) v ol v ih =1.9v, r l =3 k ? (figure 1) -7.5 -6 v high level input current i ih v in =5v (figure 2) 10 ? a low level input current i il v in =0v (figure 2) -1.6 ma high level short circuit output current (note 4) i os(h) v il =0.8v, v out =0v(figure 1) -4.5 -12 -19.5 ma low level short circuit output current i os ( l ) v ih =2v, v out =0v(figure 1) 4.5 12 19.5 ma output resistance (note 5) r out v dd =v ss =v cc =0v, v out =-2 to 2v 300 ? note 3: the algebraic convention, where the more positive (l ess negative) limit is designa ted as maximum, is used in this datasheet for logic levels only (e.g. if -10v is a maximum, the typical value is a more negative voltage). note 4: output short circuit condition s must maintain the total power dissipation below absolute maximum ratings. note 5: test conditions are those spec ified by tia/eia232- f and as listed above. ? driver switching characteristics (v dd =12v, v ss =-12v, v cc =5v, t a =25 ? c) parameter symbol test conditions min typ max unit propagation delay time level output low to high t plh r l =3 to 7 k ? , c l =15pf (figure 3) 315 500 ns high to low t phl r l =3 to 7 k ? , c l =15pf (figure 3) 75 175 ns transition time level output low to high t tlh r l =3 to 7 k ? , c l =15pf (figure 3) 60 100 ns r l =3 to 7 k ? , c l =2500pf (note 6,figure 3) 1.7 2.5 s transition time level output high to low t thl r l =3 to 7 k ? , c l =15pf (figure 3) 40 75 ns r l =3 to 7 k ? , c l =2500pf (note 7, figure 3) 1.5 2.5 s note 6: measured between -3v and 3v poi nts of the output waveform (tia/eia -232-f conditions), all unused inputs are tied. note 7: measured between 3v and -3v points of the output waveform (tia/eia-232-f conditions), all unused inputs are tied. ? receiver electrical characteristics over recommended operating conditions (t a =25 ? c, v cc =5v, v dd =9v, v ss =-9v) parameter symbol test conditions min typ max unit positive going threshold voltage v t + (figure 5) t a =25 ? c t a =0 ? c to 70 ? c 1.75 1.55 1.9 2.3 2.3 v negative going threshold voltage v t - 0.75 0.97 1.25 v input hysteresis (v t + - v t -) v hys 0.5 v output voltage high level v oh i oh =-0.5ma v ih =0.75v 2.6 4 5 v inputs open 2.6 low level v ol v in =3v, i ol =10ma 0.2 0.45 v input current high level i ih v in =25v (figure 5) 3.6 8.3 ma v in =3v (figure 5) 0.43 low level i il v in =-25v (figure 5) -3.6 -8.3 ma v in =-3v (figure 5) -0.43 short-circuit output current i os (figure 4) -3.4 -12 ma ? receiver switching characteristics (v dd =12v, v ss =-12v, v cc =5v, t a =25 ? c) parameter symbol test conditions min typ max unit propagation delay time level output low to high t plh r l =5 k ? , c l =50pf (figure 6) 107 500 ns high to low t phl 42 150 ns transition time level output low to high t tlh 175 525 ns high to low t thl 16 60 ns
75185 linear integrated circuit unisonic technologies co., ltd 5 of 10 www.unisonic.com.tw qw-r113-003.g ? parameter measurement information driver test circuits: figure 1. for v oh , v ol , i os(h) , i os(l) figure 2. for i ih , i il driver voltage waveforms: figure 3. note: 1. the pulse generator has t he following characteristics: tw=25 ? s, prr=20khz, zo=50 ? , tr=tf<50ns. 2. c l includes probe and jig capacitance.
75185 linear integrated circuit unisonic technologies co., ltd 6 of 10 www.unisonic.com.tw qw-r113-003.g ? parameter measurement information (cont.) receiver test circuits: figure 4. for i os figure 5. for v t , v oh , v ol receiver propagation and transition times: v cc v dd v ss input (see note a) pulse generator r l c l (see note b) test dircuit output input 90% 50% 10% t thl t phl t tlh t plh 90% 50% 10% 3v 0v v oh v ol 50% 50% voltage waveforms figure 6. note: 1. the pulse generator has the following characteristics: t w = 25 s, prr = 20khz, z o = 50 ? , t r =t f < 50ns. 2. c l includes probe and jig capacitance.
75185 linear integrated circuit unisonic technologies co., ltd 7 of 10 www.unisonic.com.tw qw-r113-003.g ? application information power-supply protection to meet power-off fault conditions of tia/tia-232-f diodes placed in series with the v dd and v ss leads protect the device in the f ault condition in which the device outputs are shorted to ? 15v and the power supplies are at low and pr ovide low-impedance paths to ground. typical connection ?*?: refer figure 10 to select the correct values for t he loading capacitors (c1, c2, and c3), which are required to meet the rs-232 maximum slew -rate requirement of 30v/ s. the value of the loading capacitors required depends upon the line length and desired slew rate, but typically is 330 pf.
75185 linear integrated circuit unisonic technologies co., ltd 8 of 10 www.unisonic.com.tw qw-r113-003.g ? logic symbol and logic diagram 19 18 17 16 15 14 13 12 ry1 ry2 ry3 da1 da2 ry4 da3 ry5 ra1 ra2 ra3 dy1 dy2 ra4 dy3 ra5 2 3 4 5 6 7 8 9 ra1 ra2 ra3 dy1 dy2 ra4 dy3 ra5 ry1 ry2 ry3 da1 da2 ry4 da3 ry5 ? circuit of drivers (resisto r value shown are nominal.) ? circuit of each receiver (res istor value shown are nominal.)
75185 linear integrated circuit unisonic technologies co., ltd 9 of 10 www.unisonic.com.tw qw-r113-003.g ? typical characteristics (driver) output voltage, v out (v) output current, i out (ma)
75185 linear integrated circuit unisonic technologies co., ltd 10 of 10 www.unisonic.com.tw qw-r113-003.g ? typical characteristics (receiver) 10 noise rejection 40 100 400 1000 4000 10000 0 1 2 3 5 6 0 2 6 8 10 12 14 16 4 0 free-air temperature, t a (c) 10 20 30 40 50 60 70 maximum supply voltage vs free-air temperature 4 r l 3k ? (from each output to gnd) the maximum amplitude staring from 0v of a positive-going pulse that will not cause a change in the output level. pulse duration, t w (ns) v cc = 5v t a = 25c see note a c c = 300pf c c = 500pf c c = 100pf c c = 12pf utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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