M74HC4020(2001) 데이터 시트보기 (PDF) - STMicroelectronics

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M74HC4020
(Rev.:2001)

12 STAGE BINARY COUNTER

STMicroelectronics 

M74HC4020

INPUT AND OUTPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

PIN No

9, 7, 6, 5, 3,

2, 4, 13, 12,

14, 15, 1

10

11

8

16

SYMBOL NAME AND FUNCTION

Q1, Q4 to

Q14

Parallel Outputs

CLOCK

CLEAR

GND

Vcc

Clock Input (LOW to

HIGH, Edge Triggered)

Reset Inputs

Ground (0V)

Positive Supply Voltage

TRUTH TABLE

CLOCK

X

LOGIC DIAGRAM

CLEAR

H

L

L

OUTPUT STATE

ALL OUTPUTS = "L"

NO CHANGE

ADVANCE TO NEXT STATE

This logic diagram has not be used to estimate propagation delays

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