technical data KK74HC154A 1-of-16 decoder/demultiplexer high-performance silicon-gate cmos ordering information kk 74hc154an plastic kk 74hc154adw soic t a = -55 t o 125 c for all packages the kk 74hc154a is identical in pinout to the ls/als154. the devi ce i nput s are com p at i b l e wi t h st andard c m os out put s; wi t h pul l up resistors, they are com p a tible with ls/alsttl outputs. thi s devi ce, when enabl e d, sel ect s one of 16 act i v e-l o w out put s. two activ e-lo w ch ip selects are p r o v i d e d to facilitate th e ch ip -select, d e m u ltip lex i n g , an d cascad in g fu n c tio n s . w h en eith er ch ip select is high, all outputs are high. the de m u ltiplexing function is accom p lished by usi ng t h e address i nput s t o sel ect t h e desi red devi ce out put . the kk 74hc154a is primarily used for memory address decoding and dat a rout i ng appl i cat i ons. ? outputs directly interf ace to cmos, nmos, and ttl ? operat i ng vol t a ge r a nge: 2.0 t o 6.0 v ? low input c u rrent : 1.0 a ? high noise im m unity characteristic of cmos devices logic diagram pin 24 =v cc pin 12 = gnd pin assignment 1
KK74HC154A maximum ratings * sym b o l p a r a m e t e r valu e un i t v cc dc suppl y vol t a ge (referenced t o gnd) -0.5 t o +7.0 v v in dc input vol t a ge (referenced t o gnd) -1.5 t o v cc +1.5 v v out dc output voltage (referenced to gnd) -0.5 to v cc +0.5 v i in dc input c u rrent , per pi n 20 ma i out dc out put c u rrent , per pi n 25 ma i cc dc suppl y c u rrent , v cc and gnd pins 50 ma p d po wer dissip a tio n in still air, plastic dip+ soic package+ 750 500 mw tst g st orage tem p erat ure -65 t o +150 c t l lead tem p erat ure, 1 m m from c a se for 10 seconds (plastic dip or soic package) 260 c * m a xi m u m r a t i ngs are t hose val u es bey ond whi c h dam a ge t o t h e devi ce m a y occur. functional operation should be restricted to the reco m m e nded operating conditions. +derat i ng - pl ast i c dip: - 10 m w / c from 65 t o 125 c soic package: : - 7 m w / c from 65 t o 125 c recommended operating conditions sy m bol p a r a m e t e r m i n m a x uni t v cc dc suppl y vol t a ge (referenced t o gnd) 2.0 6.0 v v in , v out dc input vol t a ge, out put vol t a ge (referenced t o gnd) 0 v cc v t a operat i ng tem p erat ure, al l package ty pes -55 +125 c t r , t f input r i se and fal l ti m e (fi gure 1) v cc =2.0 v v cc =4.5 v v cc =6.0 v 0 0 0 1000 500 400 ns thi s devi ce cont ai ns prot ect i on ci rcui t r y t o guard agai ns t dam a ge due t o hi gh st at i c vol t a ges or el ect ri c fi el ds. however, precautions m u st be taken to avoid applications of any voltage highe r than m a xim u m rated voltages to this hi gh-i m pedance ci rcui t . for proper operat i on, v in and v out shoul d be const r ai ned t o t h e range gnd (v in or v out ) v cc . unused i nput s m u st al way s be t i e d t o an appropri a t e l ogi c vol t a ge l e vel (e.g., ei t h er gnd or v cc ). unused out put s m u st be l e ft open. 2
KK74HC154A dc electrical characteristics (voltages referenced to gnd) v cc guaranteed lim it sy m bol p a r a m e t e r test c ondi t i o n s v 25 c to -55 c 85 c 125 c un it v ih m i ni m u m hi gh- level input vol t a ge v out =0.1 v or v cc -0.1 v ? i out ? 20 a 2.0 4.5 6.0 1.5 3.15 4.2 1.5 3.15 4.2 1.5 3.15 4.2 v v il m a x i mu m l o w - level input vol t a ge v out =0.1 v or v cc -0.1 v ? i out ? 20 a 2.0 4.5 6.0 0.3 0.9 1.2 0.3 0.9 1.2 0.3 0.9 1.2 v v oh m i ni m u m hi gh- level out put vol t a ge v in =v ih or v il ? i out ? 20 a 2.0 4.5 6.0 1.9 4.4 5.9 1.9 4.4 5.9 1.9 4.4 5.9 v v in =v ih or v il ? i out ? 4.0 m a ? i out ? 5.2 m a 4.5 6.0 3.98 5.48 3.84 5.34 3.7 5.2 v ol m a x i mu m l o w - level out put vol t a ge v in =v ih or v il ? i out ? 20 a 2.0 4.5 6.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 v v in =v ih or v il ? i out ? 4.0 m a ? i out ? .5.2 m a 4.5 6.0 0.26 0.26 0.33 0.33 0.4 0.4 i in m a xi m u m input leakage current v in =v cc or gnd 6.0 0.1 1.0 1.0 a i cc m a x i mu m q u i e s c e n t suppl y c u rrent (per package) v in =v cc or gnd i out =0 a 6.0 8 . 0 8 0 1 6 0 a 3
KK74HC154A ac electrical characteristics (c l =50pf,input t r =t f =6.0 ns) v cc guaranteed lim it sym b o l p a r a m e t e r v 25 c to -55 c 85 c 125 c unit t plh , t phl m a xi m u m propagat i on del a y , input a t o out put y (fi gures 1and 3) 2.0 4.5 6.0 190 38 32 240 48 41 285 57 48 ns t plh , t phl m a xi m u m propagat i on del a y , c s t o out put y (fi gures 2 and 3) 2.0 4.5 6.0 175 35 30 220 44 37 265 53 45 ns t tlh , t thl m a xi m u m out put transi t i on ti m e , any out put (fi gures 2 and 3) 2.0 4.5 6.0 75 15 13 95 19 16 110 22 19 ns c in m a xi m u m input c a paci t a nce - 10 10 10 pf power dissipation capacitance (per package) typical @25 c,v cc =5.0 v c pd used t o det e rm i n e t h e no-l o ad dy nam i c power consum pt i on: p d =c pd v cc 2 f+i cc v cc 8 0 p f function table input s o u t put s c s 1 c s 2 a 3 a 2 a 1 a0 y 0 y 1 y 2 y 3 y4 y5 y6 y7 y8 y9 y10 y 1 1 y 1 2 y 1 3 y14 y 15 l l l l l l l h h h h h h h h h h h h h h h l l l l l h h l h h h h h h h h h h h h h h l l l l h l h h l h h h h h h h h h h h h h l l l l h h h h h l h h h h h h h h h h h h l l l h l l h h h h l h h h h h h h h h h h l l l h l h h h h h h l h h h h h h h h h h l l l h h l h h h h h h l h h h h h h h h h l l l h h h h h h h h h h l h h h h h h h h l l h l l l h h h h h h h h l h h h h h h h l l h l l h h h h h h h h h h l h h h h h h l l h l h l h h h h h h h h h h l h h h h h l l h l h h h h h h h h h h h h h l h h h h l l h h l l h h h h h h h h h h h h l h h h l l h h l h h h h h h h h h h h h h h l h h l l h h h l h h h h h h h h h h h h h h l h l l h h h h h h h h h h h h h h h h h h h l l h x x x x h h h h h h h h h h h h h h h h h l x x x x h h h h h h h h h h h h h h h h h h x x x x h h h h h h h h h h h h h h h h x = don?t care 4
KK74HC154A fi gure 1. sw i t chi n g waveforms fi gure 2. sw i t chi n g waveforms figure 3. test circuit 5
KK74HC154A expanded logic diagram 6
KK74HC154A n s u f f i x p l as t i c d i p (m s - 0 0 1 a f ) sy m b o l m i n m a x a 3 1. 24 3 2 . 5 1 b 6 . 1 7. 11 c5 d 0 .3 6 0 .5 6 f 1 .1 4 1 .7 8 g h j0 10 k 2 .9 2 3 .8 1 no t e s : l 7 .6 2 8 .2 6 1. d i m e n s i o n s ?a ?, ?b ? d o n o t i n cl u d e m o l d f l as h o r p r o t r u s i o n s . m 0 . 2 0. 36 m a x i m u m m o l d f l a s h o r p r o t r u s i o n s 0. 25 m m ( 0 . 010) p e r s i d e . n0 . 3 8 d su f f i x so i c (m s - 0 1 3 a d) sy m b o l m i n m a x a 1 5. 2 1 5. 6 b7 . 4 7 . 6 c 2 .3 5 2 .6 5 d 0 .3 3 0 .5 1 f 0 . 4 1. 27 g h no t e s : j0 8 1. d i m e ns i o ns a a n d b d o no t i n c l ud e m o l d f l a s h o r p r ot r u s i o n . k0 . 1 0 . 3 2. m a x i m u m m o l d f l a s h o r p r o t r u s i o n 0. 15 m m ( 0 . 006) p e r s i d e m 0 .2 3 0 .3 2 fo r a ; fo r b ? 0. 25 m m ( 0 . 010) p e r s i d e . p 1 0 1 0. 65 r 0 .2 5 0 .7 5 9. 53 d i me n s i o n , mm d i me n s i o n , mm 2. 54 7. 62 1. 27 . 3 3 a b h c k c m j f m p g d r x 45 se a t i n g pl a n e 0 . 25 ( 0 . 0 10 ) m t -t - 1 24 12 13 l h m j a b f g d se a t i n g pl a n e n k 0. 2 5 ( 0 . 010 ) m t -t - c 1 24 12 13 7
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