Datasheet DM74S151N, DM74S151CW Datasheet (Fairchild Semiconductor)

© 2000 Fairchild Semiconductor Corporation DS006468 www.fairchildsemi.com

August 1986
Revised April 2000

DM74S151 1-of-8 Data Selector/Multiplexer with Complementary Outputs

DM74S151
1-of-8 Data Selector/Multiplexer

with Complementary Outputs

General Description

These data selectors/multiplexers contain full on-chip
decoding to select the desired data source. The
DM74S151 selects one-of-eight data sources. The
DM74S151 has a strobe input whi ch m ust 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 DM74S151 features complementary W and Y outputs.

Features

■ Select one-of-eight data lines

■ Performs parallel-to-serial conversion

■ Permits multiplexing from N lines to one line

■ Also for use as Boolean function generator

■ Typical average propagation delay tim e, data in put to W

output 4.5 ns

■ Typical power dissipati on 225 mW

Ordering Code:

Connection Diagram Function Table

H = HIGH Level
L = LOW Level
X = Don’t Care
D0, D1…D7 = The level of the respe ctiv e D input

Order Number Package Number Package Description

DM74S151N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Inputs Outputs

Select Strobe

YW

CBAS

XXXHLH
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

www.fairchildsemi.com 2

DM74S151

Logic Diagram

3 www.fairchildsemi.com

DM74S151

Absolute Maximum Ratings(Note 1)

Note 1: The “Absolute Maximum Ratings” are those value s beyond which

the safety of the dev ice cannot b e guaranteed . The device sh ould not be
operated at these limit s. The parametric values defi ned in the Electrical
Characteristics tab les are not guaranteed a t t h e absolute m ax imum rating s .
The “Recomm ended O peratin g Cond itions ” table will defin e the condition s
for actual device operation.

Recommended Operating Conditions

Electrical Characteristics

over recommended operating free air temperature (unless otherwise noted)

Note 2: All typi c als are at VCC = 5V, TA = 25°C.
Note 3: Not more than one output sh ould be shorted at a time, an d t he duration should not ex ceed one second.

Note 4: I

CC

is measured with the strobe and data select inputs at 4.5V, all other inputs and outputs OPEN.

Supply Voltage 7V
Input Voltage 5.5V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range −65°C to +150°C

Symbol Parameter Min Nom Max Units

V

CC

Supply Voltage 4.75 5 5 .25 V

V

IH

HIGH Level Input Voltage 2 V

V

IL

LOW Level Input Voltage 0.8 V

I

OH

HIGH Level Output Current −1mA

I

OL

LOW Level Output Current 20 mA

T

A

Free Air Oper ating Temperature 0 70 °C

Symbol Parameter Conditions Min

Typ

Max Units

(Note 2)

V

I

Input Clamp Voltage VCC = Min, II = −18 mA −1.2 V

V

OH

HIGH Level VCC = Min, IOH = Max,

2.7 3.4 V

Output Voltage VIL = Max, VIH = Min

V

OL

LOW Level VCC = Min, IOL = Max

0.5 V

Output Voltage V

IH

= Min, VIL = Max

I

I

Input Current @ Max Input Voltage VCC = Max, VI = 5.5V 1 mA

I

IH

HIGH Level Input Current VCC = Max, VI = 2.7V 50 µA

I

IL

LOW Level Input Current VCC = Max, VI = 0.5V −2mA

I

OS

Short Circuit Output Current VCC = Max (Note 3) −40 −100 mA

I

CC

Supply Current VCC = Max (Note 4) 45 70 mA

www.fairchildsemi.com 4

DM74S151

Switching Characteristics

at VCC = 5V and TA = 25°C

RL = 280Ω

Symbol Parameter From (Input)

C

L

= 15 pF CL = 50 pF

Units

To (Output) Min Max Min Max

t

PLH

Propagation Delay Time

Select to Y (4 Levels) 18 21 ns

LOW-to-HIGH Level Output

t

PHL

Propagation Delay Time

Select to Y (4 Levels) 18 21 ns

HIGH-to-LOW Level Output

t

PLH

Propagation Delay Time

Select to W (3 Levels) 15 18 ns

LOW-to-HIGH Level Output

t

PHL

Propagation Delay Time

Select to W (3 Levels) 13.5 17 ns

HIGH-to-LOW Level Output

t

PLH

Propagation Delay Time

Strobe to Y 16.5 19 ns

LOW-to-HIGH Level Output

t

PHL

Propagation Delay Time

Strobe to Y 18 21 ns

HIGH-to-LOW Level Output

t

PLH

Propagation Delay Time

Strobe to W 13 16 ns

LOW-to-HIGH Level Output

t

PHL

Propagation Delay Time

Strobe to W 12 16 ns

HIGH-to-LOW Level Output

t

PLH

Propagation Delay Time

D0 thru D7 to Y 12 15 ns

LOW-to-HIGH Level Output

t

PHL

Propagation Delay Time

D0 thru D7 to Y 12 15 ns

HIGH-to-LOW Level Output

t

PLH

Propagation Delay Time

D0 thru D7 to W 7 9 ns

LOW-to-HIGH Level Output

t

PHL

Propagation Delay Time

D0 thru D7 to W 7 1 0 ns

HIGH-to-LOW Level Output

5 www.fairchildsemi.com

DM74S151 1-of-8 Data Selector/Multiplexer with Complementary Outputs

Physical Dimensions inches (millimeters) unless otherwise noted

16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Package Number N16E

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:

1. Life support devices or systems are dev ic es or syste ms
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 provide d in the labe l ing, can be re a­sonably expected to result in a significant injury to the
user.

2. A critical compo nent in any com ponen t of a life s upp ort
device or system whose failure to perform can be rea­sonably expected to cause the failure of the l ife support
device or system, or to affect its safety or effectiveness.

www.fairchildsemi.com