Datasheet > 74LS245

74LS245

更新时间： 2024-02-10 00:05:16

品牌	Logo	应用领域
美国国家半导体 - NSC		总线收发器
页数	文件大小	规格书
6页	142K
描述
TRI-STATE Octal Bus Transceiver

阅读下载

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

74LS245 技术参数

生命周期：	Contact Manufacturer	包装说明：	,
Reach Compliance Code：	unknown	HTS代码：	8542.39.00.01
风险等级：	5.79	逻辑集成电路类型：	BUS TRANSCEIVER
Base Number Matches：	1

74LS245 数据手册

June 1989

54LS245/DM54LS245/DM74LS245

TRI-STATE Octal Bus Transceiver

General Description

These octal bus transceivers are designed for asynchro-

nous two-way communication between data buses. The

control function implementation minimizes external timing

requirements.

PNP inputs reduce DC loading on bus lines

Hysteresis at bus inputs improve noise margins

Typical propagation delay times, port-to-port 8 ns

Typical enable/disable times 17 ns

The device allows data transmission from the A bus to the B

bus or from the B bus to the A bus depending upon the logic

level at the direction control (DIR) input. The enable input

(G) can be used to disable the device so that the buses are

effectively isolated.

(sink current)

54LS

74LS

12 mA

24 mA

(source current)

54LS

74LS

12 mA

15 mA

Features

Alternate Military/Aerospace device (54LS245) is avail-

able. Contact a National Semiconductor Sales Office/

Distributor for specifications.

Bi-Directional bus transceiver in a high-density 20-pin

package

TRI-STATE outputs drive bus lines directly

Connection Diagram

Dual-In-Line Package

TL/F/6413–1

Order Number 54LS245DMQB, 54LS245FMQB, 54LS245LMQB,

DM54LS245J, DM54LS245W, DM74LS245WM or DM74LS245N

See NS Package Number E20A, J20A, M20B, N20A or W20A

Function Table

Direction

Enable

Operation

Control

DIR

B data to A bus

A data to B bus

Isolation

Low Level, X Irrelevant

High Level, L

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

1995 National Semiconductor Corporation

TL/F/6413

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

12 3 4 5 6

下载PDF

与74LS245相关器件

型号	品牌	描述	获取价格	数据表
74LS245DC	ETC	Bus Transceiver	获取价格
74LS245DCQM	FAIRCHILD	Bus Driver/Transceiver, 1-Func, 8-Bit, True Output, TTL, CDIP20,	获取价格
74LS245DCQR	FAIRCHILD	Bus Driver/Transceiver, 1-Func, 8-Bit, True Output, TTL, CDIP20,	获取价格
74LS245PC	ETC	Single 8-bit Bus Transceiver	获取价格
74LS245PCQR	FAIRCHILD	暂无描述	获取价格
74LS245SC	ETC	Single 8-bit Bus Transceiver	获取价格