technical data IN74ACT640 octal 3-state inverting bus transceiver high-speed silicon-gate cmos ordering information in74ac t 640n pl ast i c in74ac t 640dw soic t a = -40 to 8 5 c for all packages the in74ac t 640 i s i d ent i cal i n pi nout t o t h e ls/ a ls640, hc / h c t 640. the in74ac t 640 m a y be used as a l e vel convert er for interfacing ttl or nmos outputs to high speed cmos inputs. the in74ac t 640 i s a 3-st at e t r anscei ver t h at i s used for 2-way asy n chronous com m uni cat i on bet w een dat a buses. the devi ce has an active-low output enable pin, which is used to place the i/o ports into hi gh-i m pedance st at es. the di rect i on cont rol det e rm i n es whet her dat a flows from a to b or from b to a. ? ttl/nmos com p atible input levels ? outputs directly interf ace to cmos, nmos, and ttl ? operat i ng vol t a ge r a nge: 4.5 t o 5.5 v ? low input c u rrent : 1.0 a; 0.1 a @ 25 c ? out put s source/ si nk 24 m a pin assignment logic diagram pin 20=v cc pin 10 = gnd function table c ont rol input s out put enable di rect i o n o p e r a t i o n l l data tran sm itted fro m bu s b to bus a (inverted) l h data tran sm itted from bus a to bus b (inverted) h x b u s e s i s o l a t e d (hi gh im pedance state) x = don?t care rev. 00
IN74ACT640 rev. 00 maximum ratings * symbol parameter value unit v cc dc supply voltage (referenced to gnd) -0.5 to +7.0 v v in dc input voltage (referenced to gnd) -0.5 to v cc +0.5 v v out dc output voltage (referenced to gnd) -0.5 to v cc +0.5 v i in dc input current, per pin 20 ma i out dc output sink/source current, per pin 50 ma i cc dc supply current, v cc and gnd pins 50 ma p d power dissipation in still air, plastic dip+ soic package+ 750 500 mw tstg storage temperature -65 to +150 c t l lead temperature, 1 mm from case for 10 seconds (plastic dip or soic package) 260 c * maximum ratings are those values beyond which damage to the device may occur. functional operation should be restricted to the reco mmended operating conditions. +derating - plastic dip: - 10 mw/ c from 65 to 125 c soic package: : - 7 mw/ c from 65 to 125 c recommended operating conditions symbol parameter min max unit v cc dc supply voltage (referenced to gnd) 4.5 5.5 v v in , v out dc input voltage, output voltage (referenced to gnd) 0 v cc v t j junction temperature (pdip) 140 c t a operating temperature, all package types -40 +85 c i oh output current - high -24 ma i ol output current - low 24 ma t r , t f input rise and fall time * (except schmitt inputs) v cc =4.5 v v cc =5.5 v 0 0 10 8.0 ns/v * v in from 0.8 v to 2.0 v this device contains protection circuitry to guard agains t damage due to high static voltages or electric fields. however, precautions must be taken to avoid applications of any voltage highe r than maximum rated voltages to this high-impedance circuit. for proper operation, v in and v out should be constrained to the range gnd (v in or v out ) v cc . unused inputs must always be tied to an appropriate logic voltage level (e.g., either gnd or v cc ). unused outputs must be left open.
IN74ACT640 dc electrical characteristics (voltages referenced to gnd) v cc guaranteed lim its sy m bol p a r a m e t e r test c ondi t i o n s v 25 c - 4 0 c to 85 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 4.5 5.5 2.0 2.0 2.0 2.0 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 4.5 5.5 0.8 0.8 0.8 0.8 v v oh m i ni m u m hi gh- level out put vol t a ge i out -50 a 4.5 5.5 4.4 5.4 4.4 5.4 v * v in =v ih or v il i oh =-24 m a i oh =-24 m a 4.5 5.5 3.86 4.86 3.76 4.76 v ol m a x i mu m l o w - level out put vol t a ge i out 50 a 4.5 5.5 0.1 0.1 0.1 0.1 v * v in =v ih or v il i ol =24 m a i ol =24 m a 4.5 5.5 0.36 0.36 0.44 0.44 i in m a xi m u m input leakage current v in =v cc or gnd 5.5 0.1 1.0 a ? i cct addi t i onal m a x. i cc / i nput v in =v cc - 2.1 v 5.5 1.5 m a i oz m a x i mu m t h r e e - state leakage current v in (oe)= v ih or v il v in =v cc or gnd v out =v cc or gnd 5.5 0.6 6.0 a i old +min im u m dyn a m i c out put c u rrent v old =1.65 v m a x 5.5 75 m a i ohd +min im u m dyn a m i c out put c u rrent v ohd =3.85 v m i n 5.5 -75 m 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 5.5 8 .0 80 a * al l out put s l o aded; t h reshol ds on i nput associ at ed wi t h out put under t e st . +m axi m um t e st durat i on 2.0 m s , one out put l o aded at a t i m e. rev. 00
IN74ACT640 ac electrical characteristics (v cc =5.0 v 10%, c l =50pf,input t r =t f =3.0 ns) g u a r a n t e e d lim i t s sym b o l p a r a m e t e r 25 c - 4 0 c to 8 5 c un it min m ax min max t plh propagat i on del a y , a t o b or b t o a (fi gure 1) 1.5 1.5 1.0 8.5 ns t phl propagat i on del a y , a t o b or b t o a (fi gure 1) 1.5 8.0 1.0 9.0 ns t pzh propagat i on del a y , di rect i on or out put enabl e t o a or b (fi gure 2) 1 . 5 1 0 . 0 1 . 0 1 1 . 0 n s t pzl propagat i on del a y , di rect i on or out put enabl e t o a or b (fi gure 2) 1 . 5 1 0 . 0 1 . 0 1 1 . 0 n s t phz propagat i on del a y , di rect i on or out put enabl e t o a or b (fi gure 2) 1 . 5 1 0 . 0 1 . 0 1 1 . 0 n s t plz propagat i on del a y , di rect i on or out put enabl e t o a or b (fi gure 2) 1 . 5 1 0 . 0 1 . 0 1 1 . 0 n s c in m a xi m u m input c a paci t a nce 4.5 4.5 pf c out maxim u m three-state i/o capacitance (out put i n hi gh-im pedance st at e) 1 5 1 5 p f typical @25 c,v cc =5.0 v c pd power di ssi pat i on c a paci t a nce 45 pf fi gure 1. sw i t chi n g waveforms fi gure 2. sw i t chi n g waveforms rev. 00
IN74ACT640 expanded logic diagram rev. 00
IN74ACT640 n s u f f i x p l as t i c d i p (m s - 0 0 1 a d) sy m b o l m i n m a x a 24. 8 9 26. 92 b 6. 1 7 . 1 1 c 5. 33 d 0. 36 0. 56 f 1. 14 1. 78 g h j 0 10 k 2. 92 3. 81 no t e s : l 7. 62 8. 26 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 . 3 6 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 . n 0. 38 d su f f i x so i c (m s - 0 1 3 a c) sy m b o l m i n m a x a 12. 6 1 3 b 7. 4 7 . 6 c 2. 35 2. 65 d 0. 33 0. 51 f 0. 4 1 . 2 7 g h no t e s : j 0 8 1. d i m e n s 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 pr o t r u s i on . k 0. 1 0 . 3 2. m a x i m u m m o l d fl a s h o r p r o t ru s i o n 0 . 1 5 m m (0 . 0 0 6 ) p e r s i d e m 0. 23 0. 32 f o r a ; fo r b ? 0. 25 m m ( 0 . 010) p e r s i d e . p 10 10. 65 r 0. 25 0. 75 d i me n s i o n , mm 1. 27 9. 53 d i me n s i o n , mm 2. 54 7. 62 a b h c k c m j f m p g d r x 4 5 se a t i n g pl a n e 0.2 5 ( 0 . 0 1 0 ) m t -t - 1 20 10 11 l h m j a b f g d se a t i n g pl an e n k 0.2 5 ( 0 . 010) m t -t - c 1 20 10 11 rev. 00
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