DM74LS151N - National Semiconductor

TL/F/6392

54LS151/DM54LS151/DM74LS151 Data Selector/Multiplexer

June 1989

54LS151/DM54LS151/DM74LS151

Data Selector/Multiplexer

General Description

This data selector/multiplexer contains full on-chip decod-

ing to select the desired data source. The ’LS151 selects

one-of-eight data sources. The ’LS151 has a strobe input

which must be at a low logic level to enable these devices.

A high level at the strobe forces the W output high, and the

Y output low.

The ’LS151 features complementary W and Y outputs.

Features

YSelect one-of-eight data lines

YPerforms parallel-to-serial conversion

YPermits multiplexing from N lines to one line

YAlso for use as Boolean function generator

YTypical average propagation delay time data input to W

output 12.5 ns

YTypical power dissipation 30 mW

YAlternate Military/Aerospace device (54LS151) is avail-

able. Contact a National Semiconductor Sales Office/

Distributor for specifications.

Connection Diagram

Dual-In-Line Package

TL/F/6392–1

Order Number 54LS151DMQB, 54LS151FMQB, 54LS151LMQB,

DM54LS151J, DM54LS151W, DM74LS151M or DM74LS151N

See NS Package Number E20A, J16A, M16A, N16E or W16A

Truth Table

Inputs Outputs

Select Strobe YW

CBA S

XXX H L H

L L L L D0 D0

L L H L D1 D1

L H L L D2 D2

L H H L D3 D3

H L L L D4 D4

H L H L D5 D5

H H L L D6 D6

H H H L D7 D7

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

D0, D1...D7 ethe level of the respective D input

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 7V

Operating Free Air Temperature Range

DM54LS and 54LS b55§Ctoa

125§C

DM74LS 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 DM54LS151 DM74LS151 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 0.7 0.8 V

IOH High Level Output Current b0.4 b0.4 mA

IOL Low Level Output Current 4 8 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

18 mA b1.5 V

VOH High Level Output VCC eMin, IOH eMax DM54 2.5 3.4 V

Voltage VIL eMax, VIH eMin DM74 2.7 3.4

VOL Low Level Output VCC eMin, IOL eMax DM54 0.25 0.4

Voltage VIL eMax, VIH eMin DM74 0.35 0.5 V

IOL e4 mA, VCC eMin DM74 0.25 0.4

IIInput Current @Max VCC eMax, VIe7V 0.1 mA

Input Voltage

IIH High Level Input Current VCC eMax, VIe2.7V 20 mA

IIL Low Level Input Current VCC eMax, VIe0.4V b0.4 mA

IOS Short Circuit VCC eMax DM54 b20 b100 mA

Output Current (Note 2) DM74 b20 b100

ICC Supply Current VCC eMax (Note 3) 6 10 mA

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

Note 2: Not more than one output should be shorted at a time, and the duration should not exceed one second.

Note 3: ICC is measured with all outputs open, strobe and data select inputs at 4.5V, and all other inputs open.

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

From (Input) RLe2kX

Symbol Parameter To (output) CLe15 pF CLe50 pF Units

Min Max Min Max

tPLH Propagation Delay Time Select 43 46 ns

Low to High Level Output (4 Levels) to Y

tPHL Propagation Delay Time Select 30 36 ns

High to Low Level Output (4 Levels) to Y

tPLH Propagation Delay Time Select 23 25 ns

Low to High Level Output (3 Levels) to W

tPHL Propagation Delay Time Select 32 40 ns

High to Low Level Output (3 Levels) to W

tPLH Propagation Delay Time Strobe 42 44 ns

Low to High Level Output to Y

tPHL Propagation Delay Time Strobe 32 40 ns

High to Low Level Output to Y

tPLH Propagation Delay Time Strobe 24 27 ns

Low to High Level Output to W

tPHL Propagation Delay Time Strobe 30 36 ns

High to Low Level Output to W

tPLH Propagation Delay Time D0 thru D7 32 35 ns

Low to High Level Output to Y

tPHL Propagation Delay Time D0 thru D7 26 33 ns

High to Low Level Output to Y

tPLH Propagation Delay Time D0 thru D7 21 25 ns

Low to High Level Output to W

tPHL Propagation Delay Time D0 thru D7 20 27 ns

High to Low Level Output to W

Logic Diagram

LS151

TL/F/6392–2

See Address Buffers to the Right

Address Buffers for 54LS151/74LS151

TL/F/6392–3

Physical Dimensions inches (millimeters)

Ceramic Leadless Chip Carrier Package (E)

Order Number 54LS151LMQB

NS Package Number E20A

Ceramic Dual-In-Line Package (J)

Order Number 54LS151DMQB or DM54LS151J

NS Package Number J16A

Physical Dimensions inches (millimeters) (Continued)

16-Lead Small Outline Molded Package (M)

Order Number DM74LS151M

NS Package Number M16A

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

Order Number DM74LS151N

NS Package Number N16E

54LS151/DM54LS151/DM74LS151 Data Selector/Multiplexer

Physical Dimensions inches (millimeters) (Continued)

16-Lead Ceramic Flat Package (W)

Order Number 54LS151FMQB or DM54LS151W

NS Package Number W16A

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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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