74F269(2000) 查看數據表（PDF） - Fairchild Semiconductor

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产品描述 (功能)

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74F269
(Rev.:2000)

8-Bit Bidirectional Binary Counter

Fairchild Semiconductor 

Unit Loading/Fan Out

Pin Names

Description

P0–P7

PE

U/D

CEP

CET

CP

TC

Q0–Q7

Parallel Data Inputs

Parallel Enable Input (Active LOW)

Up-Down Count Control Input

Count Enable Parallel Input (Active LOW)

Count Enable Trickle Input (Active LOW)

Clock Input

Terminal Count Output (Active LOW)

Flip-Flop Outputs

Logic Diagram

U.L.

HIGH/LOW

1.0/1.0

1.0/1.0

1.0/1.0

1.0/1.0

1.0/1.0

1.0/1.0

5.0/33.3

50/33.3

Input IIH/IIL

Output IOH/IOL

20 µA/−0.6 mA

20 µA/−0.6 mA

20 µA/−0.6 mA

20 µA/−0.6 mA

20 µA/−0.6 mA

20 µA/−0.6 mA

−1 mA/20 mA

−1 mA/20 mA

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