DM54154J/883 - National Semiconductor

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 circuit-

ry 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 implement-

ing high-performance memory decoders. All inputs are buff-

ered and input clamping diodes are provided to minimize

transmission-line effects and thereby simplify system de-

sign.

Features

YDecodes 4 binary-coded inputs into one of 16 mutually

exclusive outputs

YPerforms the demultiplexing function by distributing data

from one input line to any one of 16 outputs

YInput clamping diodes simplify system design

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

YTypical propagation delay

3 levels of logic 19 ns

Strobe 18 ns

YTypical power dissipation 170 mW

YAlternate Military/Aerospace device (54154) is avail-

able. 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

C1995 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 b55§Ctoa

125§C

DM74 0§Ctoa

70§C

Storage Temperature Range b65§Ctoa

150§C

Note:

The ‘‘Absolute Maximum Ratings’’ are those values

beyond which the safety of the device cannot be guaran-

teed. 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

VCC Supply Voltage 4.5 5 5.5 4.75 5 5.25 V

VIH High Level Input Voltage 2 2 V

VIL Low Level Input Voltage 0.8 0.8 V

IOH High Level Output Current b0.8 b0.8 mA

IOL Low Level Output Current 16 16 mA

TAFree Air Operating Temperature b55 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)

VIInput Clamp Voltage VCC eMin, IIeb

12 mA b1.5 V

VOH High Level Output VCC eMin, IOH eMax 2.4 3.2 V

Voltage VIL eMax, VIH eMin

VOL Low Level Output VCC eMin, IOL eMax 0.25 0.4 V

Voltage VIH eMin, VIL eMax

IIInput Current @Max VCC eMax, VIe5.5V 1mA

Input Voltage

IIH High Level Input Current VCC eMax, VIe2.4V 40 mA

IIL Low Level Input Current VCC eMax, VIe0.4V b1.6 mA

IOS Short Circuit VCC eMax DM54 b20 b55 mA

Output Current (Note 2) DM74 b18 b57

ICC Supply Current VCC eMax DM54 34 49 mA

(Note 3) DM74 34 56

Note 1: All typicals are at VCC e5V, TAe25§C.

Note 2: Not more than one output should be shorted at a time.

Note 3: ICC is measured with all outputs open and all inputs grounded.

Switching Characteristics at VCC e5V and TAe25§C (See Section 1 for Test Waveforms and Output Load)

Symbol Parameter From (Input) RLe400X,C

Le15 pF Units

To (Output) Min Max

tPLH Propagation Delay Time Data to 36 ns

Low to High Level Output Output

tPHL Propagation Delay Time Data to 33 ns

High to Low Level Output Output

tPLH Propagation Delay Time Strobe to 30 ns

Low to High Level Output Output

tPHL Propagation Delay Time Strobe to 27 ns

High to Low Level Output Output

Function Table

Inputs Outputs

G1G2DCBA0123456789101112131415

L L LLLLLHHHHHHHHH HHHHHH

L L L L LHHLHHHHHHHH HHHHHH

L L LLHLHHLHHHHHHH HHHHHH

L L L LHHHHHLHHHHHH HHHHHH

L L LHL LHHHHLHHHHH HHHHHH

L L LHLHHHHHHLHHHH HHHHHH

L L LHHLHHHHHHLHHH HHHHHH

L L LHHHHHHHHHHLHH HHHHHH

L L HL L LHHHHHHHHLH HHHHHH

L L HL LHHHHHHHHHHL HHHHHH

L L HLHLHHHHHHHHHH L HHHHH

L L HLHHHHHHHHHHHH H L HHHH

L L HHL LHHHHHHHHHH H H L H H H

L L HHLHHHHHHHHHHH H H H L H H

L L HHHLHHHHHHHHHH HHHHLH

L L HHHHHHHHHHHHHH HHHHHL

L H XXXXHHHHHHHHHH HHHHHH

H L XXXXHHHHHHHHHH HHHHHH

H H XXXXHHHHHHHHHH HHHHHH

High Level, L eLow Level, X eDon’t Care

Logic Diagram

TL/F/6548–2

Physical Dimensions inches (millimeters)

24-Lead Ceramic Dual-In-Line Package (J)

Order Number 54154DMQB or DM54154J

NS Package Number J24A

24-Lead Molded Dual-In-Line Package (N)

Order Number DM74154N

NS Package Number N24A

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

Physical Dimensions inches (millimeters) (Continued)

24-Lead Ceramic Flat Package (W)

Order Number 54154FMQB

NS Package Number W24C

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DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL

SEMICONDUCTOR CORPORATION. As used herein:

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systems which, (a) are intended for surgical implant support device or system whose failure to perform can

into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life

failure to perform, when properly used in accordance support device or system, or to affect its safety or

with instructions for use provided in the labeling, can effectiveness.

be reasonably expected to result in a significant injury

to the user.

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