DM74LS279N

更新时间： 2024-11-28 23:00:43

品牌	Logo	应用领域
美国国家半导体 - NSC		锁存器
页数	文件大小	规格书
6页	140K
描述
Quad S-R Latches

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数据手册

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DM74LS279N 数据手册

May 1989

54LS279/DM54LS279/DM74LS279

Quad S-R Latches

General Description

The ’LS279 consists of four individual and independent Set-

Reset Latches with active low inputs. Two of the four latch-

es have an additonal S input ANDed with the primary S

input. A low on any S input while the R input is high will be

stored in the latch and appear on the corresponding Q out-

put as a high. A low on the R input while the S input is high

will clear the Q output to a low. Simultaneous transistion of

the R and S inputs from low to high will cause the Q output

to be indeterminate. Both inputs are voltage level triggered

and are not affected by transition time of the input data.

Features

Alternate military/aerospace device (54LS279) is avail-

able. Contact a National Semiconductor Sales Office/

Distributor for specifications.

Connection Diagram

Dual-In-Line Package

TL/F/6420–1

Order Number 54LS279DMQB, 54LS279FMQB, 54LS279LMQB,

DM54LS279J, DM74LS279M or DM74LS279N

See NS Package Number E20A, J16A, M16A, N16E or W16A

Function Table

Inputs

S(1)

Output

High Level

Low Level

The Level of Q before the indicated input conditions were established.

*This output level is pseudo stable; that is, it may not persist when the S and R

inputs return to their inactive (high) level.

Note 1: For latches with double S inputs:

both S inputs high

one or both S inputs low

1995 National Semiconductor Corporation

TL/F/6420

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

12 3 4 5 6

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与DM74LS279N相关器件

型号	品牌	获取价格	描述	数据表
DM74LS279N/A+	NSC	获取价格	IC,LATCH,QUAD,1-BIT,LS-TTL,DIP,16PIN,PLASTIC
DM74LS279N/B+	NSC	获取价格	IC,LATCH,QUAD,1-BIT,LS-TTL,DIP,16PIN,PLASTIC
DM74LS27J	ETC	获取价格	Triple 3-input NOR Gate
DM74LS27J/A+	ETC	获取价格	Triple 3-input NOR Gate
DM74LS27M	FAIRCHILD	获取价格	Triple 3-Input NOR Gate
DM74LS27M	NSC	获取价格	TRIPLE 3-INPUT NOR GATES
DM74LS27MX	FAIRCHILD	获取价格	Triple 3-input NOR Gate
DM74LS27N	NSC	获取价格	TRIPLE 3-INPUT NOR GATES
DM74LS27N	FAIRCHILD	获取价格	Triple 3-Input NOR Gate
DM74LS27N/A+	ETC	获取价格	Triple 3-input NOR Gate