74157 Quad 2 to 1 Line Data Selectors

Pin Arrangement

Truth Table

INPUTS		OUTPUTS
SEL	G'	Y
X L H	H L L	L A B

Electrical Characteristics

Propagation Delay

Input	Output	N	LS	ALS	ALS 1000	F	S	AS	AS 1000	HC	HCT	Unit [max]
Data	Y	14	14	5	-	8	7.5	-	-	32	-	nS
Select		27	27	6.5	-	15	15	-	-	32	-	nS
G'		21	21	6.5	-	11.5	12.5	-	-	29	-	nS




Input Characteristics

		N	LS	ALS	ALS 1000	F	S	AS	AS 1000	Unit
Data	High	40	20	20	-	20	50	20	-	uA
	Low	1.6	0.4	0.1	-	0.6	2	0.5	-	mA
G'	High	40	40	20	-	20	100	20	-	uA
	Low	1.6	0.8	0.1	-	0.6	4	0.5	-	mA
SEL	High	40	40	20	-	20	100	40	-	uA
	Low	1.6	0.8	0.1	-	0.6	4	1	-	mA




Output Characteristics

		N	LS	ALS	ALS 1000	F	S	AS	AS 1000	HC	HCT	Unit
All outputs	High	0.8	0.4	2.6	-	1	1	2	-	4	-	mA
	Low	16	8	24	-	20	20	20	-	4	-	mA

Reference

74158 : Quad 2 to 1 Line Data Selectors (Inverted)

Equivalent Circuit

74157

74S157, 74LS157