DM74LS154 4 Line To 16 Decoder/Demultiplexer 74154

User Manual: 74154

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Revised March 2000

DM74LS154
4-Line to 16-Line Decoder/Demultiplexer
General Description

Features

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.

■ Decodes 4 binary-coded inputs into one of 16 mutually
exclusive outputs
■ Performs the demultiplexing function by distributing data
from one input line to any one of 16 outputs
■ Input clamping diodes simplify system design
■ High fan-out, low-impedance, totem-pole outputs
■ Typical propagation delay
3 levels of logic

23 ns

Strobe

19 ns

■ Typical power dissipation 45 mW

Ordering Code:
Order Number

Package Number

Package Description

DM74LS154WM

M24B

24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide

DM74LS154N

N24A

24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-010, 0.600 Wide

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagram

© 2000 Fairchild Semiconductor Corporation

Logic Diagram

DS006394

www.fairchildsemi.com

DM74LS154 4-Line to 16-Line Decoder/Demultiplexer

August 1986

DM74LS154

Function Table
Inputs

Outputs

G1

G2

D

C

B

A

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

L

L

L

L

L

L

L

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

L

L

L

L

L

H

H

L

H

H

H

H

H

H

H

H

H

H

H

H

H

H

L

L

L

L

H

L

H

H

L

H

H

H

H

H

H

H

H

H

H

H

H

H

L

L

L

L

H

H

H

H

H

L

H

H

H

H

H

H

H

H

H

H

H

H

L

L

L

H

L

L

H

H

H

H

L

H

H

H

H

H

H

H

H

H

H

H

L

L

L

H

L

H

H

H

H

H

H

L

H

H

H

H

H

H

H

H

H

H

L

L

L

H

H

L

H

H

H

H

H

H

L

H

H

H

H

H

H

H

H

H

L

L

L

H

H

H

H

H

H

H

H

H

H

L

H

H

H

H

H

H

H

H

L

L

H

L

L

L

H

H

H

H

H

H

H

H

L

H

H

H

H

H

H

H

L

L

H

L

L

H

H

H

H

H

H

H

H

H

H

L

H

H

H

H

H

H

L

L

H

L

H

L

H

H

H

H

H

H

H

H

H

H

L

H

H

H

H

H

L

L

H

L

H

H

H

H

H

H

H

H

H

H

H

H

H

L

H

H

H

H

L

L

H

H

L

L

H

H

H

H

H

H

H

H

H

H

H

H

L

H

H

H

L

L

H

H

L

H

H

H

H

H

H

H

H

H

H

H

H

H

H

L

H

H

L

L

H

H

H

L

H

H

H

H

H

H

H

H

H

H

H

H

H

H

L

H

L

L

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

L

L

H

X

X

X

X

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

L

X

X

X

X

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

X

X

X

X

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H = HIGH Level
L = Low Level
X = Don’t Care

www.fairchildsemi.com

2

Supply Voltage

Note 1: 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 tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.

7V

Input Voltage

7V
0°C to +70°C

Operating Free Air Temperature Range

−65°C to +150°C

Storage Temperature Range

Recommended Operating Conditions
Symbol

Parameter

Min

Nom

Max

4.75

5

5.25

Units

VCC

Supply Voltage

VIH

HIGH Level Input Voltage

V

VIL

LOW Level Input Voltage

0.8

V

IOH

HIGH Level Output Current

−0.4

mA

IOL

LOW Level Output Current

8

mA

TA

Free Air Operating Temperature

70

°C

2

V

0

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

Parameter

Conditions

VI

Input Clamp Voltage

VCC = Min, II = −18 mA

VOH

HIGH Level

VCC = Min, IOH = Max

Output Voltage

VIL = Max, VIH = Min

VOL

Min

Typ
(Note 2)

Max
−1.5

2.7

3.4

Units
V
V

LOW Level

VCC = Min, IOL = Max

0.25

0.4

Output Voltage

VIL = Max, VIH = Min

0.35

0.5

IOL = 4 mA, VCC = Min

0.25

0.4

V

II

Input Current @ Max Input Voltage

VCC = Max, VI = 7V

0.1

IIH

HIGH Level Input Current

VCC = Max, VI = 2.7V

20

µA

IIL

LOW Level Input Current

VCC = Max, VI = 0.4V

−0.4

mA

IOS

Short Circuit Output Current

VCC = Max (Note 3)

−100

mA

ICC

Supply Current

VCC = Max (Note 4)

14

mA

−20
9

mA

Note 2: All typicals are at VCC = 5V, TA = 25°C.
Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 4: ICC is measured with all outputs OPEN and all inputs GROUNDED.

Switching Characteristics
at VCC = 5V and TA = 25°C
RL = 2 kΩ

From (Input)
Symbol

Parameter

To (Output)

CL = 15 pF
Min

tPLH

Propagation Delay Time
LOW-to-HIGH Level Output

tPHL

Propagation Delay Time
HIGH-to-LOW Level Output

tPLH

Propagation Delay Time
LOW-to-HIGH Level Output

tPHL

Propagation Delay Time
HIGH-to-LOW Level Output

Max

CL = 50 pF
Min

Units

Max

Data to Output

30

35

ns

Data to Output

30

35

ns

Strobe to Output

20

25

ns

Strobe to Output

25

35

ns

3

www.fairchildsemi.com

DM74LS154

Absolute Maximum Ratings(Note 1)

DM74LS154

Physical Dimensions inches (millimeters) unless otherwise noted

24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Package Number M24B

www.fairchildsemi.com

4

DM74LS154 4-Line to 16-Line Decoder/Demultiplexer

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-010, 0.600 Wide
Package Number N24A

Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
2. A critical component in any component of a life support
device or system whose failure to perform can be reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.

1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the
user.

www.fairchildsemi.com

5

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Title                           : DM74LS154 4-Line to 16-Line Decoder/Demultiplexer
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