NSC DM54LS154J-883, DM54LS154W-MLS Datasheet

TL/F/6394

DM54LS154/DM74LS154 4-Line to 16-Line Decoders/Demultiplexers

May 1989

DM54LS154/DM74LS154 4-Line to 16-Line
Decoders/Demultiplexers

General Description

Each of these 4-line-to-16-line decoders utilizes TTL circuit­ry to decode four binary-coded inputs into one of sixteen
mutually exclusive outputs when both the strobe inputs, G1
and G2, are low. The demultiplexing function is performed
by using the 4 input lines to address the output line, passing
data from one of the strobe inputs with the other strobe
input low. When either strobe input is high, all outputs are
high. These demultiplexers are ideally suited for implement­ing high-performance memory decoders. All inputs are buff­ered and input clamping diodes are provided to minimize
transmission-line effects and thereby simplify system de­sign.

Features

Y

Decodes 4 binary-coded inputs into one of 16 mutually
exclusive outputs

Y

Performs the demultiplexing function by distributing data
from one input line to any one of 16 outputs

Y

Input clamping diodes simplify system design

Y

High fan-out, low-impedance, totem-pole outputs

Y

Typical propagation delay
3 levels of logic 23 ns
Strobe 19 ns

Y

Typical power dissipation 45 mW

Connection and Logic Diagrams

Dual-In-Line Package

TL/F/6394– 1

Order Number DM54LS154J,

DM74LS154WM or DM74LS154N

See NS Package Number J24A, M24B or N24A

TL/F/6394– 2

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

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

DM54LS154 DM74LS154

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) 9 14 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 and all inputs grounded.

Switching Characteristics at V

CC

e

5V and T

A

e

25§C (See Section 1 for Test Waveforms and Output Load)

From (Input)

R

L

e

2kX

Symbol Parameter

To (Output)

C

L

e

15 pF C

L

e

50 pF Units

Min Max Min Max

t

PLH

Propagation Delay Time Data to

30 35 ns

Low to High Level Output Output

t

PHL

Propagation Delay Time Data to

30 35 ns

High to Low Level Output Output

t

PLH

Propagation Delay Time Strobe to

20 25 ns

Low to High Level Output Output

t

PHL

Propagation Delay Time Strobe to

25 35 ns

High to Low Level Output Output

2