HD74LS123RPEL Просмотр технического описания (PDF) - Renesas Electronics

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HD74LS123RPEL

Dual Retriggerable Monostable Multivibrators (with Clear)

Renesas Electronics 

HD74LS123

Pin Arrangement

1A 1

1B 2

1CLR 3

1Q 4

2Q 5

2Cext 6

2Rext/Cext 7

GND 8

CLR

QQ

QQ

CLR

16 VCC

15 1Rext/Cext

14 1Cext

13 1Q

12 2Q

11 2CLR

10 2B

9 2A

(Top view)

Function Table

Inputs

Clear

A1

L

X

X

H

X

X

H

L

H

↓

↑

L

Notes: H; high level, L; low level, X; irrelevant

↑; transition from low to high level

↓; transition from high to low level

; one high-level pulse

; one low-level pulse

Block Diagram (1/2)

B2

X

X

L

↑

H

H

External parameter

Outputs

Q

Q

L

H

L

H

L

H

A

B

Clear

Cext Rext VCC

/Cext

QQ

QQ

Clear

Rev.2.00, Feb.18.2005, page 2 of 8

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