NSC DM54157J-883 Datasheet

TL/F/6550

54157/DM54157/DM74157 Quad 2-Line to 1-Line Data Selectors/Multiplexers

June 1989

54157/DM54157/DM74157
Quad 2-Line to 1-Line Data Selectors/Multiplexers

General Description

These data selectors/multiplexers contain inverters and
drivers to supply full on-chip data selection to the four out­put gates. A separate strobe input is provided. A 4-bit word
is selected from one of two sources and is routed to the four
outputs.

Applications

Y

Expand any data input point

Y

Multiplex dual data buses

Y

Generate four functions of two variables (one variable
is common)

Y

Source programmable counters

Features

Y

Buffered inputs and outputs

Y

Typical propagation time 9 ns

Y

Typical power dissipation 150 mW

Y

Alternate Military/Aerospace device (54157) is avail­able. Contact a National Semiconductor Sales Office/
Distributor for specifications.

Connection Diagram

Dual-In-Line Package

TL/F/6550– 1

Order Number 54157DMQB, 54157FMQB, DM54157J, DM54157W or DM74157N

See NS Package Number J16A, N16E or W16A

Function Table

Inputs

Output Y

Strobe Select A B

HXXXL
LLLXL
LLHXH
LHXLL
LHXHH

H

e

High Level, LeLow Level, XeDon’t Care

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 5.5V

Operating Free Air Temperature Range

DM54 and 54

b

55§Ctoa125§C

DM74 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

DM54157 DM74157

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 0.8 0.8 V

I

OH

High Level Output Current

b

0.8

b

0.8 mA

I

OL

Low Level Output Current 16 16 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

12 mA

b

1.5 V

V

OH

High Level Output V

CC

e

Min, I

OH

e

Max

2.4 3.4 V

Voltage V

IL

e

Max, V

IH

e

Min

V

OL

Low Level Output V

CC

e

Min, I

OL

e

Max

0.4 V

Voltage V

IH

e

Min, V

IL

e

Max

I

I

Input Current@Max V

CC

e

Max, V

I

e

5.5V
1mA

Input Voltage

I

IH

High Level Input Current V

CC

e

Max, V

I

e

2.4V 40 mA

I

IL

Low Level Input Current V

CC

e

Max, V

I

e

0.4V

b

1.6 mA

I

OS

Short Circuit V

CC

e

Max DM54

b

20

b

55

mA

Output Current (Note 2)

DM74

b

18

b

55

I

CC

Supply Current V

CC

e

Max (Note 3) 30 48 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.

Note 3: I

CC

is measured with 4.5V applied to all inputs and all outputs open.

2