HEF4753 Ver la hoja de datos (PDF) - Philips Electronics

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HEF4753

Universal timer module

Philips Electronics 

Philips Semiconductors

Universal timer module

Fig.2 Pinning diagram.

HEF4753BP(N): 18-lead DIL; plastic

(SOT102-3)

HEF4753BD(N): 18-lead DIL; ceramic (cerdip)

(SOT133)

( ): Package Designator North America

Programmable 8-bit counter (1)

INPUTS ACTIVE LOW

A

B

C

D

E

F

G

H

VALUE

1

2

4

8

16

32

64

128

Note

1. All inputs A to H HIGH is not allowed.

Product specification

HEF4753B

LSI

FUNCTION TABLES

INPUTS

LFC Y

Z

L

L

H

L

H

L

H

H

L

H

L

H

H

H

H

L

H

H

LFC L

L

OPERATING MODE

counter

divider

delayed LOW to HIGH edge

delayed HIGH to LOW edge

transient pulse suppression

frequency recognition

digital pulse duration selector

Notes

1. H = HIGH state (the more positive voltage).

2. L = LOW state (the less positive voltage).

12-bit predivider

WX

LL

LH

HL

HH

CLOCK FOR PROGRAMMABLE

COUNTER CP/X

X=1

X =16

X = 256

X = 4096

January 1995

3

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