ST34C86 ...the analog plus company tm quad rs-422, rs-423 cmos differential line receiver rev. 1.01 1991 exar corporation, 48720 kato road, fremont, ca 94538 (510) 668-7000 fax (510) 668-7017 1 june 19973 features pin-to-pin compatible with national ds34c86 low power cmos design three-state outputs with enable pin meets the eia rs-422 requirements low propagation delays high speed general description the ST34C86 is a cmos quad differential line receiver designed to meet the standard rs-422, rs-423 requirements. the ST34C86 has an input sensitivity of 200mv over the common mode input voltage range of 7v. to improve noise margin and output stability for slow changing input signal, special hysteresis is built in the ST34C86 circuit. the ST34C86 is a high speed line receiver designed to operate with mfm / rll controllers and hard disk drives as well as rs-422 and rs-423 differential applications. ST34C86 provides ttl compatible outputs to interface with standard 74ls and cmos design environments. ST34C86 is suitable for low power 5v operation. ordering information part no. package operating temperature range ST34C86cp16 16 lead 300 mil pdip 0 c to +70 c ST34C86cf16 16 lead 150 mil jedec soic 0 c to +70 c ST34C86ip16 16 lead 300 mil pdip -40 c to +85 c ST34C86if16 16 lead 150 mil jedec soic -40 c to +85 c block diagram figure 1. block diagram input d- input d+ output d enable c/d out put c input c+ input c- input a- input a+ input a enable a/b input b- input b+ output b
ST34C86 2 rev. 1.01 pin configuration 16 lead pdip (0.300o) v cc input d- input d+ output d enable c/d output c input c+ input c- input a- input a+ output a eneble a/b output b input b+ input b- gnd 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 16 lead soic (jedec, 0.150o) 16 1 9 8 2 3 4 5 6 7 15 14 13 12 11 10 v cc input d- input d+ output d enable c/d output c input c+ input c- input a- input a+ output b input b+ input b- gnd output a eneble a/b pin description pin # symbol type description 1 input a- i receiver a differential inverting input pin. 2 input a+ i receiver a differential non-inverting input pin. 3 output a o receiver a output pin. 4 enable a/b i gate control (active high). this pin enables/disables the two line receiver outputs (out a and out b). 5 output b o receiver b output pin. 6 input b+ i receiver b differential non-inverting input pin. 7 input b- i receiver b differential inverting input pin. 8 gnd o signal and power ground. 9 input c- i receiver c differential inverting input pin. 10 input c+ i receiver c differential non-inverting input pin. 11 output c o receiver c output pin. 12 enable c/d i gate control (active high). this pin enables/disables the two line receiver outputs (output c and output d). 13 output d o receiver d output pin. 14 input d+ i receiver d differential non-inverting input pin. 15 input d- i receiver d differential inverting input pin. 16 v cc i power supply pin.
ST34C86 3 rev. 1.01 ac electrical characteristics test conditions: t a = -40 c - +85 c, v cc = 5.0v + 10% unless otherwise specified. symbol parameter min. typ. max. unit conditions t 1 propagation delay, input to output 8 10 ns s1=v cc t 2 propagation delay, input to output 18 20 ns s1=gnd t 3 output enable time 18 20 ns v dif =2.5v t 4 output disable time 18 20 ns v dif =2.5v dc electrical characteristics test conditions: t a = -40 c - +85 c, v cc = 5.0v + 10% unless otherwise specified. symbol parameter min. typ. max. unit conditions v ih enable high level 2.0 v v il enable low level 0.8 v v oh output high level 3.8 4.2 v i oh = -6ma v ol output low level 0.4 v -7v < v cm < +7v v id differential input level -0.2 0.2 v i oh = 6ma v h input hysteresis 50 mv i in input current + 1.0 a i cc operating current 12 ma v dif =+1v i oz three-state output leakage + 1.0 + 5.0 a v out =v cc or gnd i en enable input current + 1.0 a v in =v cc or gnd v r input resistance 5 15 k -7v < v cm < +7v specifications are subject to change without notice absolute maximum ratings supply range 7v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . voltage at any pin gnd-0.3v to v cc + 0.3v . . . . . . . . operating temperature 40 c to +85 c . . . . . . . . . . . storage temperature -60 c to +160 c . . . . . . . . . . . . package dissipation 500mw . . . . . . . . . . . . . . . . . . . . .
ST34C86 4 rev. 1.01 enable a/b c/d output differential non-inverting output differential inverting output l z x x h l l h h h h l notes x = don't care z = three-state (high impedance) table 1. functional table figure 2. test condition input a -input a -enable receiver u1 v cc s1 r1 10k c1 50pf output a
ST34C86 5 rev. 1.01 enable output x input x+ input x- t 3 t 4 t 2 t 1 figure 3. differential line receiver timing
ST34C86 6 rev. 1.01 16 lead plastic dual-in-line (300 mil pdip) rev. 1.00 16 1 9 8 d e b 1 a 1 e 1 e a l b seating plane symbol min max min max inches a 0.145 0.210 3.68 5.33 a 1 0.015 0.070 0.38 1.78 a 2 0.115 0.195 2.92 4.95 b 0.014 0.024 0.36 0.56 b 1 0.030 0.070 0.76 1.78 c 0.008 0.014 0.20 0.38 d 0.745 0.840 18.92 21.34 e 0.300 0.325 7.62 8.26 e 1 0.240 0.280 6.10 7.11 e 0.100 bsc 2.54 bsc e a 0.300 bsc 7.62 bsc e b 0.310 0.430 7.87 10.92 l 0.115 0.160 2.92 4.06 a 0 15 0 15 millimeters a a 2 c note: the control dimension is the inch column e b e a
ST34C86 7 rev. 1.01 symbol min max min max a 0.053 0.069 1.35 1.75 a 1 0.004 0.010 0.10 0.25 b 0.013 0.020 0.33 0.51 c 0.007 0.010 0.19 0.25 d 0.386 0.394 9.80 10.00 e 0.150 0.157 3.80 4.00 e 0.050 bsc 1.27 bsc h 0.228 0.244 5.80 6.20 l 0.016 0.050 0.40 1.27 a 0 8 0 8 inches millimeters 16 lead small outline (150 mil jedec soic) rev. 1.00 e 16 9 8 d e h b a l c a 1 seating plane a note: the control dimension is the millimeter column 1
ST34C86 8 rev. 1.01 notice exar corporation reserves the right to make changes to the products contained in this publication in order to im- prove design, performance or reliability. exar corporation assumes no responsibility for the use of any circuits de- scribed 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 user's specific application. while the information in this publication has been carefully checked; no responsibility, 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 can reasonably be expected to cause failure of the life support system 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 liability of exar corporation is adequately protected under the circum- stances. copyright 1997 exar corporation datasheet june 1997 reproduction, in part or whole, without the prior written consent of exar corporation is prohibited.
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