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1/12 july 2001 n high speed: t pd = 27 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 = 6ma (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 354 description the m74hc354 is an high speed cmos 8 channel multiplexer/register (3-state) fabricated with silicon gate c 2 mos technology. this device contains an 8 channel digital multiplexer with an 8-input data register and a 3-bit address input register with 3-state outputs. the one of eight input data will be provided on the y output pin (non-inverted output) and w output pin (inverted output) determined by the address data. the information at the data inputs ( d0 to d7) is stored in the 8-bit latch at the negative pulse on dc input. the information at the address inputs (s0 to s2) is stored in the 3-bit latch at the negative pulse on sc input. these outputs are disabled to be high-impedance when inputs g1 , g2 are held high or input g3 is held low. this device is suitable for interfacing with bus lines in a bus organized system. the m74hc354 is similar in function to the m74hc356, which has an 8-bit flip-flop as the data register instead of an 8-bit latch. all inputs are equipped with protection circuits against static discharge and transient excess voltage. m74hc354 pin connection and iec logic symbols order codes package tube t & r dip m74hc354b1r sop M74HC354M1R m74hc354rm13tr tssop m74hc354ttr tssop dip sop 8 channel multiplexer/register (3 state)
m74hc354 2/12 input and output equivalent circuit pin description truth table x : dont care z : high impedance * : this column shows the input address setup with sc low. d0n....d7n : the level of steady state inputs at input d0 through d7, respectively, before the most recent low to high transit ion of data control. pin no symbol name and function 8, 7, 6, 5, 4, 3, 2, 1 d0 to d7 data inputs 9dc data enable input (active low) 11 s c latch enable input (active low) 14, 13, 12 s0, s1, s2 select inputs 15, 16 g1 , g2 output enable inputs (active low) 17 g3 output enable input (active high) 18 w 3 - state multiplexer output (active low) 19 y 3 - state multiplexer output (active high) 10 gnd ground (0v) 20 v cc positive supply voltage inputs outputs select * dc output enables wy s2 s1 s0 g1 g2 g3 xxxxhxxzz xxxxxhxzz xxxxxxlzz llllllhd0 d0 lllhllhd0n d0n llhlllhd1 d1 llhhllhd1n d1n lhllllhd2 d2 lhlhllhd2n d2n lhhl llhd3 d3 lhhh l lhd3n d3n hlllllhd4 d4 h l l h l l h d4n d4n hlhl llhd5 d5 h l h h l l h d5n d5n hhllllhd6 d6 h h l h l l h d6n d6n hhhl l lhd7 d7 hhhh l lhd7n d7n
m74hc354 3/12 truth table of internal latch x : dont care qn : data stored at the trailing edge of the most recent st pulse. logic diagram 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 inputs outputs dstq q lhlh hhhl x l qn qn 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 35 ma i cc or i gnd dc v cc or ground current 70 ma p d power dissipation 500(*) mw t stg storage temperature -65 to +150 c t l lead temperature (10 sec) 300 c
m74hc354 4/12 recommended operating conditions dc specifications 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 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 =-6.0 ma 4.18 4.31 4.13 4.10 6.0 i o =-7.8 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 =6.0 ma 0.17 0.26 0.33 0.40 6.0 i o =7.8 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 oz high impedance output leakage current 6.0 v i = v ih or v il v o = v cc or gnd 0.5 5 5 m a i cc quiescent supply current 6.0 v i = v cc or gnd 44080 m a
m74hc354 5/12 ac electrical characteristics (c l = 50 pf, input t r = t f = 6ns) 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 50 25 60 75 90 ns 4.5 7121518 6.0 6101315 t plh t phl propagation delay time (dn, dc - y, w) 2.0 50 83 210 265 315 ns 4.5 26 42 53 63 6.0 21 36 45 54 2.0 150 99 250 315 375 4.5 31 50 63 75 6.0 25 43 54 64 t plh t phl propagation delay time (sn - y, w) 2.0 50 98 260 325 390 ns 4.5 30 52 65 78 6.0 25 44 55 66 2.0 150 114 300 375 450 4.5 35 60 75 90 6.0 29 51 64 77 t plh t phl propagation delay time (sc - y, w) 2.0 50 102 270 340 405 ns 4.5 31 54 68 81 6.0 27 46 58 69 2.0 150 118 310 390 465 4.5 36 62 78 93 6.0 31 53 66 79 t pzl t pzh high impedance output enable time 2.0 50 r l = 1k w 44 125 155 190 ns 4.5 14 25 31 38 6.0 12 21 26 32 2.0 150 r l = 1k w 60 165 205 250 4.5 19 33 41 50 6.0 16 28 35 43 t plz t phz high impedance output disable time 2.0 50 r l = 1k w 42 155 195 235 ns 4.5 20 31 39 47 6.0 17 26 33 40 t w(l) minimum pulse width (dc ) (sc ) 2.0 50 18 75 95 110 ns 4.5 6151922 6.0 6131619 t s minimum set-up time (dn) (sn) 2.0 50 10 50 65 75 ns 4.5 3101315 6.0 3 9 11 13 t h minimum hold time (dn) (sn) 2.0 50 555 ns 4.5 5 5 5 6.0 5 5 5
m74hc354 6/12 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 test circuit c l = 50pf/150pf or equivalent (includes jig and probe capacitance) r 1 = 1k w or equivalent r t = z out of pulse generator (typically 50 w ) 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 77 pf test switch t plh , t phl open t pzl , t plz v cc t pzh , t phz gnd
m74hc354 7/12 waveform 1: propagation delay time (f=1mhz; 50% duty cycle) waveform 2: setup and hold times (f=1mhz; 50% duty cycle)
m74hc354 8/12 waveform 3 : propagation delay times, minimum pulse width (f=1mhz; 50% duty cycle) waveform 4 : output enable and disable time (f=1mhz; 50% duty cycle)
m74hc354 9/12 dim. mm. inch min. typ max. min. typ. max. a1 0.254 0.010 b 1.39 1.65 0.055 0.065 b 0.45 0.018 b1 0.25 0.010 d 25.4 1.000 e 8.5 0.335 e 2.54 0.100 e3 22.86 0.900 f 7.1 0.280 i 3.93 0.155 l 3.3 0.130 z 1.34 0.053 plastic dip-20 (0.25) mechanical data p001j
m74hc354 10/12 dim. mm. inch min. typ max. min. typ. max. a 2.65 0.104 a1 0.1 0.2 0.004 0.008 a2 2.45 0.096 b 0.35 0.49 0.014 0.019 b1 0.23 0.32 0.009 0.012 c 0.5 0.020 c1 45 (typ.) d 12.60 13.00 0.496 0.512 e 10.00 10.65 0.393 0.419 e 1.27 0.050 e3 11.43 0.450 f 7.40 7.60 0.291 0.300 l 0.50 1.27 0.020 0.050 m 0.75 0.029 s8 (max.) so-20 mechanical data po13l
m74hc354 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 6.4 6.5 6.6 0.252 0.256 0.260 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 tssop20 mechanical data c e b a2 a e1 d 1 pin 1 identification a1 l k e 0087225c
m74hc354 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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