HD74HC257 View Datasheet(PDF) - Renesas Electronics

Part Name

Description

View to exact match

HD74HC257

Quad. 2-to-1-line Data Selectors/Multiplexers (with noninverted 3-state outputs)

Renesas Electronics 

HD74HC257

Pin Arrangement

Select 1

1A 2

1B 3

1Y 4

2A 5

2B 6

2Y 7

GND 8

S

1A OC

1B 4A

1Y 4B

2A 4Y

2B 3A

2Y 3B

3Y

(Top view)

16 VCC

15

Output

control

14 4A

13 4B

12 4Y

11 3A

10 3B

9 3Y

Logic Diagram

1A

1B

2A

2B

3A

3B

4A

4B

VCC

1Y

VCC

2Y

VCC

3Y

VCC

4Y

Select

Output

control

Rev.2.00 Jan 31, 2006 page 2 of 7

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