INTEGRAL IN74HC157AN, IN74HC157AD Datasheet

TECHNICAL DATA

Quad 2-Input Data Selectors/Multiplexer

High-Performance Silicon-Gate CMOS

The IN74HC157A is identical in pinout to the LS/ALS157. The
device inputs are compatible with standard CMOS outputs; with pullup
resistors, they are compatible with LS/ALSTTL outputs.

This device routes 2 nibbles (A or B) to a single port (Y) as
determined by the Select input. The data is presented at the outputs in
noninvertered form. A high level on the Outp ut Enable input sets all
four Y outputs to a low level.

•

Outputs Directly Interface to CMOS, NMOS, and TTL

•

Operating Voltage Range: 2.0 to 6.0 V

•

Low Input Current: 1.0 µA

•

High Noise Immunity Characteristic of CMOS Devices

ORDERING INFORMATION

TA = -55° to 125° C for all packages

IN74HC157A

IN74HC157AN Plastic

IN74HC157AD SOIC

LOGIC DIAGRAM

PIN 16 =V

PIN 8 = GND

CC

PIN ASSIGNMENT

FUNCTION TABLE

Inputs Outputs

Output
Enable

HXL
LLA0-A3
LHB0-B3

X=don’t care
A0-A3,B0-B3=the levels of the respective
Data-Word Inputs

Select Y0-Y3

182

IN74HC157A

MAXIMUM RATINGS

*

Symbol Parameter Value Unit

V

CC

V

V

OUT

I

IN

I

OUT

I

CC

P

DC Supply Voltage (Referenced to GND) -0.5 to +7.0 V
DC Input Voltage (Referenced to GND) -1.5 to VCC +1.5 V

IN

DC Output Voltage (Referenced to GND) -0.5 to VCC +0.5 V
DC Input Current, per Pin
DC Output Current, per Pin
DC Supply Current, VCC and GND Pins
Power Dissipation in Still Air, Plastic DIP+

D

SOIC Package+

±

20

±

25

±

50

750
500

Tstg Storage Temperature -65 to +150

T

Lead Temperature, 1 mm from Case for 10 Seconds

L

260

(Plastic DIP or SOIC Package)

*

Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
+Derating - Plastic DIP: - 10 mW/°C from 65° to 125°C

SOIC Package: : - 7 mW/°C from 65° to 125°C

mA
mA
mA

mW

°

C

°

C

RECOMMENDED OPERATING CONDITIONS

Symbol Parameter Min Max Unit

V

CC

VIN, V

T

A

tr, t

f

This device c ontains p rote ction ci rcuitr y to guard a gainst damage d ue to high st atic voltages or electr ic
fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated
voltages to this high-impedance circuit. For proper operation, V
GND≤(V

Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or V
Unused outputs must be left open.

DC Supply Voltage (Referenced to GND) 2.0 6.0 V
DC Input Voltage, Output Voltage (Referenced to GND) 0 V

OUT

Operating Temperature, All Package Types -55 +125
Input Rise and Fall Time (Figure 1) VCC =2.0 V

IN

or V

OUT

)≤VCC.

V

CC

V

CC

and V

IN

=4.5 V

=6.0 V

OUT

should be constrained to the range

0
0
0

CC

1000

500
400

V

°

C

ns

CC

).

183