Philips hef4753b DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

For a complete data sheet, please also download:

•The IC04 LOCMOS HE4000B Logic
Family Specifications HEF, HEC

•The IC04 LOCMOS HE4000B Logic
Package Outlines/Information HEF, HEC

HEF4753B
LSI

Universal timer module

Product specification
File under Integrated Circuits, IC04

January 1995

Philips Semiconductors Product specification

Universal timer module

DESCRIPTION

The HEF4753B is a universal timer module for counting
and dividing as well as for event-recognition and
manipulation of input sequences.
The following functions are included: synchronization and
edge-detection of the input signal, programmable counter,
clock divider with different lengths, operating mode
decoder, control logic and output multiplexer.
Depending on the operating mode and the application, the
circuit works as a presettable 8-bit counter with

HEF4753B

LSI

transient-pulse suppression, pulse duration selector
divider, counter, positive or negative edge delaying
module or low-frequency control circuit.
All manipulation possibilities depend on a time scaling,
which is adjustable by the 8-bit programmable counter and
the system clock. The system clock can be divided
internally by 1, 16, 256 or 4096 as input clock for the
counter. In all cases the manipulated input sequence
appears at the only output OUT.

Fig.1 Functional diagram.

FAMILY DATA, IDDLIMITS category LSI

See Family Specifications

January 1995 2

Philips Semiconductors Product specification

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

HEF4753B

LSI

FUNCTION TABLES

INPUTS

OPERATING MODE

LFC Y Z

L L H counter

L H L divider
H H L delayed LOW to HIGH edge
H L H delayed HIGH to LOW edge
H H H transient pulse suppression

L H H frequency recognition

LFC L L digital pulse duration selector

Notes

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

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

Programmable 8-bit counter

INPUTS ACTIVE LOW VALUE

A1
B2
C4
D8
E16
F32
G64
H 128

Note

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

(1)

12-bit predivider

WX

L L X=1

L H X =16
H L X = 256
H H X = 4096

CLOCK FOR PROGRAMMABLE

COUNTER CP/X

January 1995 3