5-273

FAST AND LS TTL DATA

QUAD 2-INPUT MULTIPLEXER

The LSTTL/ MSI SN54L/ 74LS158 is a high speed Quad 2-input Multiplex-

er. It selects four bits of data from two sources using the common Select and

Enable inputs. The four buffered outputs present the selected data in the

inverted form. The LS158 can also generate any four of the 16 different

functions of two variables. The LS158 is fabricated with the Schottky barrier

diode process for high speed and is completely compatible with all Motorola

TTL families.

CONNECTION DIAGRAM DIP (TOP VIEW)

NOTE:

The Flatpak version

has the same pinouts

(Connection Diagram) as

the Dual In-Line Package.

14

13

12

11

10

9

1

2

3

4

5

6

7

16

15

8

VCC

S

E

I0c

I1c

Zc

I1d

I0d

Zd

I0a

I1a

Za

I0b

I1b

Zb GND

PIN NAMES

LOADING (Note a)

HIGH

LOW

S

E

I0a – I0d

I1a – I1d

Za – Zd

Common Select Input

Enable (Active LOW) Input

Data Inputs from Source 0

Data Inputs from Source 1

Inverted Outputs (Note b)

1.0 U.L.

1.0 U.L.

0.5 U.L.

0.5 U.L.

10 U.L.

0.5 U.L.

0.5 U.L.

0.25 U.L.

0.25 U.L.

5 (2.5) U.L.

NOTES:

a) 1 TTL Unit Load (U.L.) = 40

µA HIGH/1.6 mA LOW.

b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74)

Temperature Ranges.

LOGIC DIAGRAM

I0a

I1a

I0b

I1b

I0c

I1c

I0d

I1d E S

Za

Zb

Zc

Zd

14

1

2

6

7

3

4

5

9

11

12

10

13

15

VCC = PIN 16

GND = PIN 8

= PIN NUMBERS

SN54/74LS158

QUAD 2-INPUT MULTIPLEXER

LOW POWER SCHOTTKY

J SUFFIX

CERAMIC

CASE 620-09

N SUFFIX

PLASTIC

CASE 648-08

16

1

16

1

ORDERING INFORMATION

SN54LSXXXJ

Ceramic

SN74LSXXXN

Plastic

SN74LSXXXD

SOIC

16

1

D SUFFIX

SOIC

CASE 751B-03

LOGIC SYMBOL

VCC = PIN 16

GND = PIN 8

15 2 3 5 6 14 13 11 10

1

4

7

12

9

E I0a I1a I0b I1b I0c I1c I0d I1d

Za

Zb

Zc

Zd

S