NSC DM54154J-883 Datasheet

TL/F/6548

54154/DM54154/DM74154 4-Line to 16-Line Decoders/Demultiplexers

June 1989

54154/DM54154/DM74154
4-Line to 16-Line Decoders/Demultiplexers

General Description

Each or 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 19 ns
Strobe 18 ns

Y

Typical power dissipation 170 mW

Y

Alternate Military/Aerospace device (54154) is avail­able. Contact a National Semiconductor Sales Office/
Distributor for specifications.

Connection Diagram

Dual-In-Line Package

TL/F/6548– 1

Order Number 54154DMQB, 54154FMQB, DM54154J or DM74154N

See NS Package Number J24A, N24A or W24C

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

DM54154 DM74154

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 3.2 V

Voltage V

IL

e

Max, V

IH

e

Min

V

OL

Low Level Output V

CC

e

Min, I

OL

e

Max

0.25 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

57

I

CC

Supply Current V

CC

e

Max DM54 34 49

mA

(Note 3)

DM74 34 56

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 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)

Symbol Parameter

From (Input) R

L

e

400X,C

L

e

15 pF

Units

To (Output)

Min Max

t

PLH

Propagation Delay Time Data to

36 ns

Low to High Level Output Output

t

PHL

Propagation Delay Time Data to

33 ns

High to Low Level Output Output

t

PLH

Propagation Delay Time Strobe to

30 ns

Low to High Level Output Output

t

PHL

Propagation Delay Time Strobe to

27 ns

High to Low Level Output Output

2