Datasheet > DM54LS279

DM54LS279

更新时间： 2024-01-04 16:54:40

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技术参数
数据手册

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DM54LS279 技术参数

是否Rohs认证：	不符合	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：	5.7
逻辑集成电路类型：	R-S LATCH

DM54LS279 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DM54LS279相关器件

型号	品牌	获取价格	描述	数据表
DM54LS279E/883	ETC	获取价格	S-R-Type Latch
DM54LS279J	NSC	获取价格	Quad S-R Latches
DM54LS279J/883	ROCHESTER	获取价格	R-S Latch, LS Series, 4-Func, Low Level Triggered, 2-Bit, True Output, TTL, CDIP16, DIP-16
DM54LS279W	ETC	获取价格	S-R-Type Latch
DM54LS279W/883	NSC	获取价格	IC LS SERIES, QUAD LOW LEVEL TRIGGERED R-S LATCH, TRUE OUTPUT, CDFP16, DFP-16, FF/Latch
DM54LS279W/883	ROCHESTER	获取价格	R-S Latch, LS Series, 4-Func, Low Level Triggered, 2-Bit, True Output, TTL, CDFP16, DFP-16
DM54LS279W/883B	ROCHESTER	获取价格	R-S Latch
DM54LS279W/883C	ROCHESTER	获取价格	R-S Latch, LS Series, 4-Func, Low Level Triggered, 2-Bit, True Output, TTL, CDFP16, DFP-16
DM54LS27E	ETC	获取价格	Triple 3-input NOR Gate
DM54LS27E/883	ROCHESTER	获取价格	NOR Gate