INS8253 - Programmable Interval Timer

Datasheet Summary

Description

The INS8253 is a programmable timer/counter device contained in a standard, 24-pin dual-in-line package.

The chip, which is fabricated using N-channel silicon gate technology, provides counting or time-out services in a microcomputer system.

Features

3 Individually Programmable 16-Bit Counters.
6 Operating Modes.
DC to 2MHz Count Rates.
Individual Count Rate and Modulus for Each Counter.
Selectable Counting System (Binary or BCD) for Each Counter.
TRI-STATE@ TTL Drive Capability for Bidirectional Data Bus.
Single + 5 Volt Power Supply.
24-Pin Dual-in-Line Package.

National Semiconductor

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Datasheet Details

Part number	INS8253
Manufacturer	National Semiconductor
File Size	612.86 KB
Description	Programmable Interval Timer
Datasheet	INS8253 Datasheet
Additional preview pages of the INS8253 datasheet.

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Full PDF Text Transcription

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~National ~ Semiconductor Preliminary JULY 1978 INS8253 Programmable Interval Timer General. Description The INS8253 is a programmable timer/counter device contained in a standard, 24-pin dual-in-line package. The chip, which is fabricated using N-channel silicon gate technology, provides counting or time-out services in a microcomputer system. The various operating modes and other functional characteristics of thelNS8253 are programmed by the system software. The INS8253 provides three independent 16-bit down counters, each of which is capable of count rates in the range DC to 2MHz. Through software initialization, each counter can be made to operate in anyone of six modes. The modulus and counting system used are also specified by system software.

Published: Apr 12, 2024 |