DM74LS85M

更新时间： 2024-11-27 23:00:43

品牌	Logo	应用领域
美国国家半导体 - NSC		/
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8页	158K
描述
4-Bit Magnitude Comparators

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数据手册

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DM74LS85M 数据手册

June 1989

54LS85/DM54LS85/DM74LS85

4-Bit Magnitude Comparators

General Description

These 4-bit magnitude comparators perform comparison of

straight binary or BCD codes. Three fully-decoded decisions

about two, 4-bit words (A, B) are made and are externally

available at three outputs. These devices are fully expand-

able to any number of bits without external gates. Words of

have a high-level voltage applied to the A

B input. The

cascading path is implemented with only a two-gate-level

delay to reduce overall comparison times for long words.

Features

greater length may be compared by connecting compara-

Typical power dissipation 52 mW

tors in cascade. The A B, A B, and A

B outputs of a

Typical delay (4-bit words) 24 ns

stage handling less-significant bits are connected to the cor-

responding inputs of the next stage handling more-signifi-

cant bits. The stage handling the least-significant bits must

Alternate Military/Aerospace device (54LS85) is avail-

able. Contact a National Semiconductor Sales Office/

Distributor for specifications.

Connection Diagram

Dual-In-Line Package

Order Number 54LS85DMQB,

54LS85FMQB, 54LS85LMQB,

DM54LS85J, DM54LS85W,

DM74LS85M or DM74LS85N

See NS Package Number E20A,

J16A, M16A, N16E or W16A

TL/F/6379–1

Function Table

Comparing

Inputs

Cascading

Outputs

Inputs

A3, B3

A2, B2

A1, B1

A0, B0

A3 B3

A2 B2

A1 B1

A0 B0

High Level, L

Low Level, X

Don’t Care

1995 National Semiconductor Corporation

TL/F/6379

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

12 3 4 5 6 7 8

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与DM74LS85M相关器件

型号	品牌	获取价格	描述	数据表
DM74LS85MX	FAIRCHILD	获取价格	Magnitude Comparator
DM74LS85N	FAIRCHILD	获取价格	4-Bit Magnitude Comparator
DM74LS85N	NSC	获取价格	4-Bit Magnitude Comparators
DM74LS85N/A+	ETC	获取价格	Magnitude Comparator
DM74LS85N/B+	ETC	获取价格	Magnitude Comparator
DM74LS86	FAIRCHILD	获取价格	Quad 2-Input Exclusive-OR Gate
DM74LS86	NSC	获取价格	Quad 2-Input Exclusive-OR Gates
DM74LS86J	NSC	获取价格	暂无描述
DM74LS86J/A+	ETC	获取价格	Quad 2-input Exclusive OR (XOR) Gate
DM74LS86M	FAIRCHILD	获取价格	Quad 2-Input Exclusive-OR Gate