MC74HC4538AN datasheet(2/16 Pages) ONSEMI

Part #	MC74HC4538AN

Description	Dual Precision Monostable Multivibrator(Retriggerable, Resettable)

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Manufacturer	ONSEMI [ON Semiconductor]

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MC74HC4538A

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2

Figure 2. Logic Diagram

PIN 16 = VCC

PIN 8 = GND

RX AND CX ARE EXTERNAL COMPONENTS

PIN 1 AND PIN 15 MUST BE HARD WIRED TO GND

CX1RX1

VCC

Q1

RESET 1

B1

A1

TRIGGER

INPUTS

Q1

12

4

5

3

6

7

CX2RX2

VCC

Q2

RESET 2

B2

A2

TRIGGER

INPUTS

Q2

15

14

12

11

13

10

9

FUNCTION TABLE

Inputs

Outputs

Reset

A

B

Q

HH

HL

H

X

L

Not Triggered

H

X

Not Triggered

H

L,H,

H

Not Triggered

H

L

L,H,

Not Triggered

LX

X

L

H

X

Not Triggered

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