DM74LS251M datasheet(1/6 Pages) NSC

No de pièce	DM74LS251M

Description	TRI-STATE Data Selectors/Multiplexers

Download	6 Pages

Scroll/Zoom	100%

Fabricant	NSC [National Semiconductor (TI)]

Site Internet	http://www.national.com

Logo

1 / 6 page

TLF6415

June 1989

DM54LS251DM74LS251

TRI-STATE

Data SelectorsMultiplexers

General Description

These data selectorsmultiplexers contain full on-chip bina-

ry decoding to select one-of-eight data sources and feature

a strobe-controlled TRI-STATE output The strobe must be

at a low logic level to enable these devices The TRI-STATE

outputs permit direct connection to a common bus When

the strobe input is high both outputs are in a high-imped-

ance state in which both the upper and lower transistors of

each totem-pole output are off and the output neither drives

nor loads the bus significantly When the strobe is low the

outputs are activated and operate as standard TTL totem-

pole outputs

To minimize the possibility that two outputs will attempt to

take a common bus to opposite logic levels the output con-

trol circuitry is designed so that the average output disable

time is shorter than the average output enable time

Features

Y

TRI-STATE version of LS151

Y

Interface directly with system bus

Y

Perform parallel-to-serial conversion

Y

Permit multiplexing from N-lines to one line

Y

Complementary outputs provide true and inverted data

Y

Maximum number of common outputs

54LS

49

74LS

129

Y

Typical propagation delay time (D to Y)

54LS

17 ns

74LS

17 ns

Y

Typical power dissipation

54LS

35 mW

74LS

35 mW

Connection Diagram

Dual-In-Line Package

TLF6415 – 1

Order Number DM54LS251J DM54LS251W

DM74LS251M or DM74LS251N

See NS Package Number J16A M16A N16E or W16A

Function Table

Inputs

Outputs

Select

Strobe

YW

CBA

S

XXX

H

Z

L

D0

L

H

L

D1

L

H

L

D2

L

H

L

D3

H

L

D4

H

L

H

L

D5

H

L

D6

H

L

D7

H e High Logic Level L e Low Logic Level

X e Don’t Care Z e High Impedance (Off)

D0 D1

D7 e The level of the respective D input

TRI-STATE

is a registered trademark of National Semiconductor Corporation

C1995 National Semiconductor Corporation

RRD-B30M105Printed in U S A

Numéro de pièce similaire - DM74LS251M

Fabricant	No de pièce	Fiches technique	Description
Fairchild Semiconductor	DM74LS251M	58Kb / 6P	3-STATE 1-of-8 Line Data Selector/Multiplexer

More results

Description similaire - DM74LS251M

Fabricant	No de pièce	Fiches technique	Description
National Semiconductor ...	54LS253	158Kb / 6P	TRI-STATE Data Selectors/Multiplexers
National Semiconductor ...	54LS257A	163Kb / 8P	TRI-STATE Quad 2-Data Selectors/Multiplexers
Texas Instruments	54LS257	413Kb / 10P	[Old version datasheet] TRI-STATE(RM) Quad 2-Data Selectors/Multiplexers
National Semiconductor ...	DM74253	167Kb / 4P	TRI-STATE 1 of 8 Line Data Selectors/Multiplexers
	DM74251	188Kb / 4P	TRI-STATE 1 of 8 Line Data Selectors/Multiplexers
	DM54S257	153Kb / 8P	TRI-STATE QUAD 1 OF 2 DATA SELECTORS / MULTIPLEXERS
Texas Instruments	SN74150J	1Mb / 25P	[Old version datasheet] DATA SELECTORS/MULTIPLEXERS
Fairchild Semiconductor	DM74150	47Kb / 4P	Data Selectors/Multiplexers
Texas Instruments	SN54150	1Mb / 24P	[Old version datasheet] DATA SELECTORS/MULTIPLEXERS
Fairchild Semiconductor	DM74LS257B	56Kb / 5P	3-STATE Quad 2-Data Selectors/Multiplexers

More results

DM74LS251M Fiches technique(PDF) 1 Page - National Semiconductor (TI)

DM74LS251M Fiches technique(HTML) 1 Page - National Semiconductor (TI)

Numéro de pièce similaire - DM74LS251M

Description similaire - DM74LS251M

Html Pages

1 2 3 4 5 6

Fiches technique Télécharger

Lien URL