Datasheet > DP8238

DP8238

更新时间： 2024-02-21 02:00:55

品牌	Logo	应用领域
其他 - ETC		/
页数	文件大小	规格书
6页	140K
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DP8238 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	DIP, DIP28,.6	Reach Compliance Code：	unknown
风险等级：	5.92	JESD-30 代码：	R-PDIP-T28
JESD-609代码：	e0	端子数量：	28
最高工作温度：	70 °C	最低工作温度：
封装主体材料：	PLASTIC/EPOXY	封装代码：	DIP
封装等效代码：	DIP28,.6	封装形状：	RECTANGULAR
封装形式：	IN-LINE	认证状态：	Not Qualified
子类别：	Other Microprocessor ICs	表面贴装：	NO
技术：	BIPOLAR	温度等级：	COMMERCIAL
端子面层：	Tin/Lead (Sn/Pb)	端子形式：	THROUGH-HOLE
端子节距：	2.54 mm	端子位置：	DUAL

DP8238 数据手册

December 1988

DP8228/DP8228M/DP8238/DP8238M

System Controller and Bus Driver

General Description

The DP8228/DP8228M, DP8238/DP8238M are system

controller/bus drivers contained in a standard, 28-pin dual-

in-line package. The chip, which is fabricated using Schottky

Bipolar technology, generates all the read and write control

signals required to directly interface the memory and input/

output components of the 8080A microcomputer family. The

chip also provides drive and isolation for the bidirectional

data bus of the 8080A microprocessor. Data bus isolation

enables the use of slower memory and input/output compo-

nents in a system, and provides for enhanced system noise

immunity.

when an interrupt is acknowledged by the 8080A. This fea-

ture permits the use of a multilevel priority interrupt structure

in large, interrupt-driven systems.

Features

Single chip system controller and bus driver for 8080A

Microcomputer Systems

Allows use of multibyte CALL instructions for Interrupt

Acknowledge

Provides user-selected single-level interrupt vector

(RST 7)

A user-selected signal-level interrupt vector (RST 7) is pro-

vided by the device for use in the interrupt structure of small

systems that need only one basic vector. No additional

components (such as an interrupt instruction port) are re-

quired to use the single interrupt vector in these systems.

The devices also generate an Interrupt Acknowledge (INTA)

control signal for each byte of a multibyte CALL instruction

Provides isolation of data bus

Supports a wide variety of system bus structures

Reduces system component count

DP8238/DP8238M provides advanced Input/Output

Write and Memory Write control signals for large sys-

tem timing control

8080A Microcomputer Family Block Diagram

TL/F/6825–1

TRI-STATEÉ is a registered trademark of National Semiconductor Corporation.

1995 National Semiconductor Corporation

TL/F/6825

RRD-B30M105/Printed in U. S. A.

12 3 4 5 6

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