1/10 july 2001 n high speed: t pd = 16ns (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 154 description the m74hc154 is an high speed cmos 4 to 16 line decoder/demultiplexer fabricated with silicon gate c 2 mos technology. a binary code applied to the four inputs (a to d) provides a low level at the selected one of sixteen outputs excluding the other fifteen outputs, when both the strobe inputs, g1 and g2 , are held low. when either strobe input is held high, the decoding function is inhibited to keep all outputs high. the strobe function makes it easy to expand the decoding lines through cascading, and simplifies the design of address decoding circuits in memory control systems. all inputs are equipped with protection circuits against static discharge and transient excess voltage. m74hc154 4 to 16 line decoder/demultiplexer pin connection and iec logic symbols order codes package tube t & r dip m74hc154b1r sop M74HC154M1R m74hc154rm13tr tssop m74hc154ttr tssop dip sop
m74hc154 2/10 input and output equivalent circuit pin description truth table x : dont care pin no symbol name and function 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17 y0 to y15 outputs (active low) 18, 19 g1 , g2 enable inputs (active low) 23, 22, 21, 20 a to d address inputs 12 gnd ground (0v) 24 v cc positive supply voltage inputs selected output (l) g1 g2 dcba llllll y0 lllllh y1 llllhl y2 llllhh y3 lllhll y4 lllhlh y5 lllhhl y6 lllhhh y7 llhlll y8 llhllh y9 llhlhl y10 l l h l h h y11 llhhll y12 l l h h l h y13 l lhhhl y14 l lhhhh y15 xhxxxx none hxxxxx none
m74hc154 3/10 logic diagram this logic diagram has not be used to estimate propagation delays 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 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
m74hc154 4/10 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 v 4.5 3.15 3.15 6.0 4.2 4.2 v il low level input voltage 2.0 0.5 0.5 v 4.5 1.35 1.35 6.0 1.8 1.8 v oh high level output voltage 2.0 i o =-20 m a 1.9 2.0 1.9 v 4.5 i o =-20 m a 4.4 4.5 4.4 6.0 i o =-20 m a 5.9 6.0 5.9 4.5 i o =-4.0 ma 4.18 4.31 4.13 6.0 i o =-5.2 ma 5.68 5.8 5.63 v ol low level output voltage 2.0 i o =20 m a 0.0 0.1 0.1 v 4.5 i o =20 m a 0.0 0.1 0.1 6.0 i o =20 m a 0.0 0.1 0.1 4.5 i o =4.0 ma 0.17 0.26 0.33 6.0 i o =5.2 ma 0.18 0.26 0.33 i i input leakage current 6.0 v i = v cc or gnd 0.1 1 m a i cc quiescent supply current 6.0 v i = v cc or gnd 44080 m a
m74hc154 5/10 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 test circuit c l = 50pf or equivalent (includes jig and probe capacitance) 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. t tlh t thl output transition time 2.0 30 75 95 110 ns 4.5 8151922 6.0 7131619 t plh t phl propagation delay time (a, b, c, d - y ) 2.0 65 125 155 300 ns 4.5 19 25 31 60 6.0 16 21 26 51 t plh t phl propagation delay time (g1 , g2 - y) 2.0 55 160 200 265 ns 4.5 17 32 40 53 6.0 15 27 34 45 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 5 10 10 pf c pd power dissipation capacitance (note 1) 5.0 57 pf
m74hc154 6/10 waveform 1: propagation delay times (f=1mhz; 50% duty cycle)
m74hc154 7/10 dim. mm. inch min. typ max. min. typ. max. a1 0.63 0.025 b 0.45 0.018 b1 0.23 0.31 0.009 0.012 b2 1.27 0.500 d 32.2 1.268 e 15.2 16.68 0.598 0.657 e 2.54 0.100 e3 27.94 1.100 f 14.1 0.555 i 4.445 0.175 l 3.3 0.130 plastic dip-24 (0.25) mechanical data p043a
m74hc154 8/10 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 15.20 15.60 0.598 0.614 e 10.00 10.65 0.393 0.419 e 1.27 0.050 e3 13.97 0.550 f 7.40 7.60 0.291 0.300 l 0.50 1.27 0.020 0.050 s8 (max.) so-24 mechanical data po13t f c l e a1 b1 a e d e3 b 24 13 112 c1 s a2
m74hc154 9/10 dim. mm. inch min. typ max. min. typ. max. a 1.1 0.043 a1 0.05 0.15 0.002 0.006 a2 0.9 0.035 b 0.19 0.30 0.0075 0.0118 c 0.09 0.20 0.0035 0.0079 d 7.7 7.9 0.303 0.311 e 6.25 6.5 0.246 0.256 e1 4.3 4.5 0.169 0.177 e 0.65 bsc 0.0256 bsc k0 80 8 l 0.50 0.70 0.020 0.028 tssop24 mechanical data c e b a2 a e1 d 1 pin 1 identification a1 l k e 7047476a
m74hc154 10/10 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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