54ls140/74LS140 lsttl ? 4 50 ? ?1/2 ?? a b c d y h h h h l l h l h l h l h h= ?? l= ?? = ? 74 54 ? ? vcc ?? 4.75 5 5.25 4.5 5 5.5 v v ih ??? 2 2 v v il ??? 0.8 0.7 v i oh ?? -40 -40 ma i ol ?? 24 12 ma t a ? -40 85 -55 125 ? tpd=12ns pd=4.3mw / ? ?? ?? bdtic ?? www.bdtic.com/semiconductor www.bdtic.com free datasheet http://www..net/
54ls140/74LS140 lsttl ? 4 50 ? ??????? 74 54 ? ? v ik ?? vcc= i i = - 18ma -1.5 -1.5 v i oh = v il =0.5v 2.0 2.0 v oh ??? vcc= i oh =-1.2 ma v il = 2.7 2.5 3.4 v vcc= v ol ??? v ih =2v i ol = 0.5 0.25 0.4 v i i (??) vcc= v i =7v 0.1 0.1 ma i ih ?? vcc= v i =2.7v 20 20 a i il ?? vcc= v i =0.4v -0.4 -0.4 ma i os vcc= v o =0v -30 -130 -30 -130 ma i cch ??? vcc= v i =0v 1.0 0.45 1.0 ma i ccl ??? vcc= ? 6.0 3.0 6.0 ma ?? vcc=5.0v, t a =25 2 ? vcc=5.0v, t a =25 ? ?? t plh ? a b c d y 12 24 ns t phl ? a b c d y c l =45pf r l =667 ? 12 24 ns bdtic e'_?f? www.bdtic.com/semiconductor www.bdtic.com free datasheet http://www..net/
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