74221 查看數據表（PDF） - Fairchild Semiconductor

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74221

Dual Monostable Multivibrators (with Schmitt Trigger Input)

Fairchild Semiconductor 

Truth Table

H = HIGH Level

L = LOW Level

↑= Transition from LOW-to-HIGH

↓= Transition from HIGH-to-LOW

= One HIGH Level Pulse

= One LOW Level Pulse

X = Irrelevant

Logic Diagram

Inputs

Clear

A

B

L

X

X

X

H

X

X

X

L

H

L

↑

H

↓

H

↑

L

H

Outputs

Q

Q

L

H

L

H

L

H

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