NSC DM54LS151W-MLS Datasheet

TL/F/6392

54LS151/DM54LS151/DM74LS151 Data Selector/Multiplexer

June 1989

54LS151/DM54LS151/DM74LS151
Data Selector/Multiplexer

General Description

This data selector/multiplexer contains full on-chip decod­ing to select the desired data source. The ’LS151 selects
one-of-eight data sources. The ’LS151 has a strobe input
which must be at a low logic level to enable these devices.
A high level at the strobe forces the W output high, and the
Y output low.

The ’LS151 features complementary W and Y outputs.

Features

Y

Select one-of-eight data lines

Y

Performs parallel-to-serial conversion

Y

Permits multiplexing from N lines to one line

Y

Also for use as Boolean function generator

Y

Typical average propagation delay time data input to W
output 12.5 ns

Y

Typical power dissipation 30 mW

Y

Alternate Military/Aerospace device (54LS151) is avail­able. Contact a National Semiconductor Sales Office/
Distributor for specifications.

Connection Diagram

Dual-In-Line Package

TL/F/6392– 1

Order Number 54LS151DMQB, 54LS151FMQB, 54LS151LMQB,

DM54LS151J, DM54LS151W, DM74LS151M or DM74LS151N
See NS Package Number E20A, J16A, M16A, N16E or W16A

Truth Table

Inputs Outputs

Select Strobe

YW

CBA

S

XXX H L H
L L L L D0 D0
L L H L D1 D1
L H L L D2 D2
L H H L D3 D3
H L L L D4 D4
H L H L D5 D5
H H L L D6 D6
H H H L D7 D7

HeHigh Level, LeLow Level, XeDon’t Care

D0, D1...D7

e

the level of the respective D input

C

1995 National Semiconductor Corporation RRD-B30M105/Printed in U. S. A.

Absolute Maximum Ratings (Note)

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.

Supply Voltage 7V

Input Voltage 7V

Operating Free Air Temperature Range

DM54LS and 54LS

b

55§Ctoa125§C

DM74LS 0

§

Ctoa70§C

Storage Temperature Range

b

65§Ctoa150§C

Note:

The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaran­teed. The device should not be operated at these limits. The
parametric values defined in the ‘‘Electrical Characteristics’’
table are not guaranteed at the absolute maximum ratings.
The ‘‘Recommended Operating Conditions’’ table will define
the conditions for actual device operation.

Recommended Operating Conditions

Symbol Parameter

DM54LS151 DM74LS151

Units

Min Nom Max Min Nom Max

V

CC

Supply Voltage 4.5 5 5.5 4.75 5 5.25 V

V

IH

High Level Input Voltage 2 2 V

V

IL

Low Level Input Voltage 0.7 0.8 V

I

OH

High Level Output Current

b

0.4

b

0.4 mA

I

OL

Low Level Output Current 4 8 mA

T

A

Free Air Operating Temperature

b

55 125 0 70

§

C

Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)

Symbol Parameter Conditions Min

Typ

Max Units

(Note 1)

V

I

Input Clamp Voltage V

CC

e

Min, I

I

eb

18 mA

b

1.5 V

V

OH

High Level Output V

CC

e

Min, I

OH

e

Max DM54 2.5 3.4

V

Voltage V

IL

e

Max, V

IH

e

Min

DM74 2.7 3.4

V

OL

Low Level Output V

CC

e

Min, I

OL

e

Max DM54 0.25 0.4

Voltage V

IL

e

Max, V

IH

e

Min

DM74 0.35 0.5 V

I

OL

e

4 mA, V

CC

e

Min DM74 0.25 0.4

I

I

Input Current@Max V

CC

e

Max, V

I

e

7V

0.1 mA

Input Voltage

I

IH

High Level Input Current V

CC

e

Max, V

I

e

2.7V 20 mA

I

IL

Low Level Input Current V

CC

e

Max, V

I

e

0.4V

b

0.4 mA

I

OS

Short Circuit V

CC

e

Max DM54

b

20

b

100

mA

Output Current (Note 2)

DM74

b

20

b

100

I

CC

Supply Current V

CC

e

Max (Note 3) 6 10 mA

Note 1: All typicals are at V

CC

e

5V, T

A

e

25§C.

Note 2: Not more than one output should be shorted at a time, and the duration should not exceed one second.

Note 3: I

CC

is measured with all outputs open, strobe and data select inputs at 4.5V, and all other inputs open.

2