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1/12 august 2001 n high speed : t pd = 13 ns (typ.) at v cc = 6v n low power dissipation: i cc =4 m a(max.) at t a =25c n high noise immunity: v nih = v nil = 28 % v cc (min.) n symmetrical output impedance: |i oh | = i ol = 4ma (min) n balanced propagation delays: t plh @ t phl n wide operating voltage range: v cc (opr) = 2v to 6v n pin and function compatible with 74 series 194 description the m74hc194 is an high speed cmos 8 bit pipo shift register fabricated with silicon gate c 2 mos technology. this shift register is designed to incorporate virtually all of the features a system designer may want in a shift register. it features parallel inputs, parallel outputs, right shift and left shift serial inputs, clear line. the register has four distinct modes of operation : parallel (broadside) load ; shift right(sr) (in the direction q a q d ); shift left(sl); inhibit clock (do nothing). synchronous parallel loading is accomplished by applying the four data bits and taking both mode control inputs, s0 and s1 high. the data are loaded into their respective flip-flops and appear at the outputs after the positive transition of the clock input. during loading, serial data flow is inhibited. shift right is accomplished synchronously with the rising edge of the clock pulse when s0 is high and s1 is low. serial data for this mode is entered at the shift right data input. when s0 is low and s1 is high, data shift left synchronously and new data is entered at the shift left serial input. clocking of the flip-flops is inhibited when both mode control inputs are low. the mode control inputs should be changed only when the clock input is high. all inputs are equipped with protection circuits against static discharge and transient excess voltage. m74hc194 4 bit pipo shift register pin connection and iec logic symbols order codes package tube t & r dip m74hc194b1r sop M74HC194M1R m74hc194rm13tr tssop m74hc194ttr tssop dip sop
m74hc194 2/12 input and output equivalent circuit pin description truth table x : dont care a ~ d : the level of steady state input voltage at input a ~ d qa0 ~ qd0 : no change qan ~ qdn : the level of qa, qb, qc, respectively, before the most recent positive transition of the clock. pin no symbol name and function 1 clear asynchronous reset input (active low) 2sr serial data input (shift right) 3, 4, 5, 6 a to d parallel data inputs 7sl serial data input (shift left) 9, 10 s0, s1 mode control inputs 11 clock clock input (low to high edge-triggered) 15, 14, 13, 12 qa to qd parallel outputs 8 gnd ground (0v) 16 vcc positive supply voltage inputs outputs clear mode clock serial parallel qa qb qc qd s1 s0 left right a b c d lxxxxxxxxxllll h x x x x x x x x qa0 qb0 qc0 qd0 h hh xxabcdabcd h l h x h x x x x h qan qbn qcn h l h x l x x x x l qan qbn qcn h h l h x x x x x qbn qcn qdn h h h l l x x x x x qbn qcn qdn l h l l x x x x x x x qa0 qb0 qc0 qd0
m74hc194 3/12 logic diagram this logic diagram has not be used to estimate propagation delays timing chart
m74hc194 4/12 absolute maximum ratings absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these conditi ons is not implied (*) 500mw at 65 c; derate to 300mw by 10mw/ c from 65 c to 85 c recommended operating conditions symbol parameter value unit v cc supply voltage -0.5 to +7 v v i dc input voltage -0.5 to v cc + 0.5 v v o dc output voltage -0.5 to v cc + 0.5 v i ik dc input diode current 20 ma i ok dc output diode current 20 ma i o dc output current 25 ma i cc or i gnd dc v cc or ground current 50 ma p d power dissipation 500(*) mw t stg storage temperature -65 to +150 c t l lead temperature (10 sec) 300 c symbol parameter value unit v cc supply voltage 2 to 6 v v i input voltage 0 to v cc v v o output voltage 0 to v cc v t op operating temperature -55 to 125 c t r , t f input rise and fall time v cc = 2.0v 0 to 1000 ns v cc = 4.5v 0 to 500 ns v cc = 6.0v 0 to 400 ns
m74hc194 5/12 dc specifications symbol parameter test condition value unit v cc (v) t a = 25c -40 to 85c -55 to 125c min. typ. max. min. max. min. max. v ih high level input voltage 2.0 1.5 1.5 1.5 v 4.5 3.15 3.15 3.15 6.0 4.2 4.2 4.2 v il low level input voltage 2.0 0.5 0.5 0.5 v 4.5 1.35 1.35 1.35 6.0 1.8 1.8 1.8 v oh high level output voltage 2.0 i o =-20 m a 1.9 2.0 1.9 1.9 v 4.5 i o =-20 m a 4.4 4.5 4.4 4.4 6.0 i o =-20 m a 5.9 6.0 5.9 5.9 4.5 i o =-4.0 ma 4.18 4.31 4.13 4.10 6.0 i o =-5.2 ma 5.68 5.8 5.63 5.60 v ol low level output voltage 2.0 i o =20 m a 0.0 0.1 0.1 0.1 v 4.5 i o =20 m a 0.0 0.1 0.1 0.1 6.0 i o =20 m a 0.0 0.1 0.1 0.1 4.5 i o =4.0 ma 0.17 0.26 0.33 0.40 6.0 i o =5.2 ma 0.18 0.26 0.33 0.40 i i input leakage current 6.0 v i = v cc or gnd 0.1 1 1 m a i cc quiescent supply current 6.0 v i = v cc or gnd 44080 m a
m74hc194 6/12 ac electrical characteristics (c l = 50 pf, input t r = t f = 6ns) capacitive characteristics 1) c pd is defined as the value of the ics internal equivalent capacitance which is calculated from the operating current consumption without load. (refer to test circuit). average operating current can be obtained by the following equation. i cc(opr) = c pd x v cc x f in + i cc symbol parameter test condition value unit v cc (v) t a = 25c -40 to 85c -55 to 125c min. typ. max. min. max. min. max. t tlh t thl output transition time 2.0 30 75 95 115 ns 4.5 8151923 6.0 7131620 t plh t phl propagation delay time (clock - q) 2.0 48 115 145 175 ns 4.5 15 23 29 35 6.0 13 20 25 30 t phl propagation delay time (clear - q) 2.0 52 125 155 190 ns 4.5 17 25 31 38 6.0 15 21 26 32 f max maximum clock frequency 2.0 6.2 13 5.0 4.2 mhz 4.5 31 50 25 21 6.0 37 59 30 25 t w(h) t w(l) minimum pulse width (clock) 2.0 20 75 95 110 ns 4.5 5151922 6.0 4131619 t w(l) minimum pulse width (clear ) 2.0 24 75 95 110 ns 4.5 6151922 6.0 5131619 t s minimum set-up time (si, pi - clock) 2.0 20 75 95 110 ns 4.5 5151922 6.0 4131619 t s minimum set-up time (s0, s1 - clock) 2.0 28 75 95 110 ns 4.5 7151923 6.0 6131620 t h minimum hold time 2.0 0 0 0 ns 4.5 0 0 0 6.0 0 0 0 t rem minimum removal time 2.0 5 5 5 ns 4.5 5 5 5 6.0 5 5 5 symbol parameter test condition value unit v cc (v) t a = 25c -40 to 85c -55 to 125c min. typ. max. min. max. min. max. c in input capacitance 5.0 5101010pf c pd power dissipation capacitance (note 1) 5.0 85 pf
m74hc194 7/12 test circuit c l = 50pf or equivalent (includes jig and probe capacitance) r t = z out of pulse generator (typically 50 w ) waveform 1 : propagation delay time (f=1mhz; 50% duty cycle)
m74hc194 8/12 waveform 2 : minimum pulse width and removal time (f=1mhz; 50% duty cycle) waveform 3 : minimum pulse width, setup and hold time (f=1mhz; 50% duty cycle)
m74hc194 9/12 dim. mm. inch min. typ max. min. typ. max. a1 0.51 0.020 b 0.77 1.65 0.030 0.065 b 0.5 0.020 b1 0.25 0.010 d 20 0.787 e 8.5 0.335 e 2.54 0.100 e3 17.78 0.700 f 7.1 0.280 i 5.1 0.201 l 3.3 0.130 z 1.27 0.050 plastic dip-16 (0.25) mechanical data p001c
m74hc194 10/12 dim. mm. inch min. typ max. min. typ. max. a 1.75 0.068 a1 0.1 0.2 0.003 0.007 a2 1.65 0.064 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 c 0.5 0.019 c1 45 (typ.) d 9.8 10 0.385 0.393 e 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 8.89 0.350 f 3.8 4.0 0.149 0.157 g 4.6 5.3 0.181 0.208 l 0.5 1.27 0.019 0.050 m 0.62 0.024 s8 (max.) so-16 mechanical data po13h
m74hc194 11/12 dim. mm. inch min. typ max. min. typ. max. a 1.2 0.047 a1 0.05 0.15 0.002 0.004 0.006 a2 0.8 1 1.05 0.031 0.039 0.041 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0089 d 4.9 5 5.1 0.193 0.197 0.201 e 6.2 6.4 6.6 0.244 0.252 0.260 e1 4.3 4.4 4.48 0.169 0.173 0.176 e 0.65 bsc 0.0256 bsc k0 80 8 l 0.45 0.60 0.75 0.018 0.024 0.030 tssop16 mechanical data c e b a2 a e1 d 1 pin 1 identification a1 l k e 0080338d
m74hc194 12/12 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result f rom its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specificati ons mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectronics. ? the st logo is a registered trademark of stmicroelectronics ? 2001 stmicroelectronics - printed in italy - all rights reserved stmicroelectronics group of companies australia - brazil - china - finland - france - germany - hong kong - india - italy - japan - malaysia - malta - morocco singapore - spain - sweden - switzerland - united kingdom ? http://www.st.com

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