Datasheet > HT6542B

HT6542B

更新时间： 2024-09-26 22:48:27

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HT6542B 数据手册

HT6542B

Keyboard Controller with PS/2

Features

•

High reliability MOS technology

Support PS/2 compatible mouse

•

8042-type host interface

Auto-detect AT and PS/2 motherboard

Support 40 pin DIP and 44 pin PLCC pack-

ages

•

6MHz-12MHz operating frequency

Communicates with keyboard directly

Provides enhanced Gate A20 switching

General Description

The HT6542B is a keyboard controller devel-

oped by Holtek with a 4-bit microprocessor. It is

pin-to-pin compatible with Intel 8042 keyboard

controller used in IBM PC’s. PC manufacturers

need not modify any printed wiring layout

when using the HT6542B in lieu of the Intel

8042 based keyboard controller. Furthermore,

the HT6542B can support a system clock speed

of up to 12MHz. The HT6542B can detect the

motherboard type automatically, therefore it

can be employed on both of AT and PS/2 moth-

erboard.

Pin Assignment

40 Pin DIP package

44 Pin PLCC package

30th Nov ’95

12 3 4 5 6 7

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型号	品牌	获取价格	描述	数据表
HT6542B(40DIP)	ETC	获取价格	Keyboard Controller
HT6542B(44PLCC)	ETC	获取价格	Keyboard Controller
HT6547A(28DIP)	ETC	获取价格	Encoder
HT6547C	HOLTEK	获取价格	KEYBOARD ENCODER FOR WINDOWS95
HT6547C(40DIP)	ETC	获取价格	Encoder
HT6547E(40DIP)	ETC	获取价格	Encoder
HT6549A(40DIP)	ETC	获取价格	Encoder
HT6550	HOLTEK	获取价格	Super I/O Controller
HT-6550	HOLTEK	获取价格	Super I/O Controller
HT6550(100PQFP)	ETC	获取价格	Peripheral (Multifunction) Controller