74257 - Quad 2-input multiplexer; 3-state


S	1 •	16	Vcc
1I₀	2	15	OE
1I₁	3	14	4I₀
1Y	4	13	4I₁
2I₀	5	12	4Y
2I₁	6	11	3I₀
2Y	7	10	3I₁
GND	8	9	3Y

Pin	Symbol	Description
1	S	common data select input
2	1I₀	data input from source 0
3	1I₁	data input from source 1
4	1Y	multiplexer output
5	2I₀	data input from source 0
6	2I₁	data input from source 1
7	2Y	multiplexer output
8	GND	ground
9	3Y	multiplexer output
10	3I₁	data input from source 1
11	3I₀	data input from source 0
12	4Y	multiplexer output
13	4I₁	data input from source 1
14	4I₀	data input from source 0
15	OE	enable input (active low; outputs in high-impedance off state when high)
16	Vcc	supply voltage

Specifications

(typical values under recommended operating conditions, unless specified)

Parameter	Value	Unit
Propagation delay, nI₀, nI₁ to nY	11 (74HC) 13 (74HCT)	ns
Propagation delay, S to nY	14 (74HC) 17 (74HCT)	ns

Note: Data is maintained by an independent source and accuracy is not guaranteed. Check with the manufacturer's datasheet for up-to-date information.