M74HC4020 查看數據表（PDF） - STMicroelectronics

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M74HC4020

HC4040 12 STAGE BINARY COUNTER HC4020 14 STAGE BINARY COUNTER

STMicroelectronics 

M54/M74HC4020/4040

INPUT AND OUTPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION (HC4020)

PIN No

9, 7, 6, 5,

3, 2, 4, 13,

12, 14, 15,

1

10

11

8

16

SYMBOL

Q1, Q4 to

Q14

CLOCK

CLEAR

GND

VCC

NAME AND FUNCTION

Parallel Outputs

Clock Input (LOW to

HIGH, edge triggered)

Reset Inputs

Ground (0V)

Positive Supply Voltage

IEC LOGIC SYMBOLS

HC4020

PIN DESCRIPTION (HC4040)

PIN No

9, 7, 6, 5,

3, 2, 4, 13,

12, 14, 15,

1

10

11

8

16

SYMBOL

Q1 to Q12

CLOCK

CLEAR

GND

VCC

NAME AND FUNCTION

Parallel Outputs

Clock Input (LOW to

HIGH, edge triggered)

Reset Inputs

Ground (0V)

Positive Supply Voltage

HC4040

TRUTH TABLE

CLOCK

X

2/13

CLEAR

H

L

L

OUTPUT STATE

ALL OUTPUTS = ”L”

NO CHANGE

ADVANCE TO NEXT STATE

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