Datasheet > 74LS240

74LS240

更新时间： 2024-11-29 22:53:15

品牌	Logo	应用领域
美国国家半导体 - NSC		驱动器
页数	文件大小	规格书
6页	145K
描述
Octal TRI-STATE Buffers/Line Drivers/Line Receivers

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数据手册

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74LS240 数据手册

April 1992

DM54LS240/DM74LS240,

DM54LS241/DM74LS241

Octal TRI-STATE Buffers/Line Drivers/Line Receivers

Typical I (sink current)

General Description

54LS

74LS

12 mA

24 mA

These buffers/line drivers are designed to improve both the

performance and PC board density of TRI-STATE buffers/

drivers employed as memory-address drivers, clock drivers,

and bus-oriented transmitters/receivers. Featuring 400 mV

of hysteresis at each low current PNP data line input, they

provide improved noise rejection and high fanout outputs

and can be used to drive terminated lines down to 133X.

Typical I

54LS

74LS

(source current)

12 mA

15 mA

Typical propagation delay times

Inverting 10.5 ns

Noninverting 12 ns

Typical enable/disable time 18 ns

Typical power dissipation (enabled)

Features

TRI-STATE outputs drive bus lines directly

Inverting 130 mW

Noninverting 135 mW

PNP inputs reduce DC loading on bus lines

Hysteresis at data inputs improves noise margins

Connection Diagrams

Dual-In-Line Package

TL/F/6411–1

TL/F/6411–2

Order Number DM54LS240J,

DM54LS240W, DM54LS240E,

DM74LS240WM or DM74LS240N

See NS Package Number E20A, J20A,

M20B, N20A or W20A

Order Number DM54LS241J,

DM54LS241W, DM54LS241E,

DM74LS241WM or DM74LS241N

See NS Package Number E20A, J20A,

M20B, N20A or W20A

Function Tables

LS240

LS241

Inputs

Output

Inputs

Outputs

Low Logic Level

High Logic Level

Either Low or High Logic Level

High Impedance

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

1995 National Semiconductor Corporation

TL/F/6411

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

12 3 4 5 6

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与74LS240相关器件

型号	品牌	获取价格	描述	数据表
74LS240DC	ETC	获取价格	Dual 4-Bit Inverting Buffer/Driver
74LS240DCQM	FAIRCHILD	获取价格	Bus Driver, 2-Func, 4-Bit, Inverted Output, TTL, CDIP20,
74LS240DCQR	FAIRCHILD	获取价格	Bus Driver, 2-Func, 4-Bit, Inverted Output, TTL, CDIP20,
74LS240FC	FAIRCHILD	获取价格	Bus Driver, 2-Func, 4-Bit, Inverted Output, TTL, CDFP20,
74LS240FCQM	FAIRCHILD	获取价格	Bus Driver, 2-Func, 4-Bit, Inverted Output, TTL, CDFP20,
74LS240FCQR	ROCHESTER	获取价格	Bus Driver,
74LS240N	NXP	获取价格	IC LS SERIES, DUAL 4-BIT DRIVER, INVERTED OUTPUT, PDIP20, PLASTIC, DIP-20, Bus Driver/Tran
74LS240PC	ETC	获取价格	Dual 4-Bit Inverting Buffer/Driver
74LS240PCQM	ROCHESTER	获取价格	Bus Driver,
74LS240PCQR	ROCHESTER	获取价格	Bus Driver,