CD74HCT423E 查看數據表（PDF） - Harris Semiconductor

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CD74HCT423E

High Speed CMOS Logic Dual Retriggerable Monostable Multivibrators with Resets

Harris Semiconductor 

CD74HC123, CD74HCT123, CD74HC423, CD74HCT423

Functional Diagram

1A

1

1B

2

1R

3

11

2R

9

2A

10

2B

1Cx 1Rx

14

15

VCC

1Cx

1RxCx

13

1Q

MONO 1

4

1Q

MONO 2

5

2Q

12

2Q

2Cx

2RxCx

6

7

2Cx 2Rx

VCC

TRUTH TABLE

INPUTS

A

B

R

CD74HC/HCT123

H

X

H

X

L

H

L

↑

H

OUTPUTS

Q

Q

L

H

L

H

↓

H

H

X

X

L

L

H

L

H

↑

CD74HC/HCT423

H

X

H

L

H

X

L

H

L

H

L

↑

H

↓

H

H

X

X

L

L

H

NOTE: H = High Voltage Level, L = Low Voltage Level,

X = Don’t Care.

2

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