5-416

FAST AND LS TTL DATA

DUAL 4-INPUT MULTIPLEXER

WITH 3-STATE OUTPUTS

The LSTTL/ MSI SN54/ 74LS253 is a Dual 4-Input Multiplexer with 3-state

outputs. It can select two bits of data from four sources using common select

inputs. The outputs may be individually switched to a high impedance state

with a HIGH on the respective Output Enable (E0) inputs, allowing the outputs

to interface directly with bus oriented systems. It 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)

14

13

12

11

10

9

1

2

3

4

5

6

7

16

15

8

VCC

E0a

E0b S0

I3b

I2b

I0b

I1b

Zb

S1

I3a

I2a

I1a

I0a

Za GND

NOTE:

The Flatpak version

has the same pinouts

(Connection Diagram) as

the Dual In-Line Package.

PIN NAMES

LOADING (Note a)

HIGH

LOW

S0, S1

Common Select Inputs

0.5 U.L.

0.25 U.L.

Multiplexer A

E0a

Output Enable (Active LOW) Input

0.5 U.L.

0.25 U.L.

I0a – I3a

Multiplexer Inputs

0.5 U.L.

0.25 U.L.

Za

Multiplexer Output (Note b)

65 (25) U.L.

15 (7.5) U.L.

Multiplexer B

E0b

Output Enable (Active LOW) Input

0.5 U.L.

0.25 U.L.

I0b – I3b

Multiplexer Inputs

0.5 U.L.

0.25 U.L.

Zb

Multiplexer Output (Note b)

65 (25) U.L.

15 (7.5) U.L.

NOTES:

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

µA HIGH/1.6 mA LOW.

b) The Output LOW drive factor is 7.5 U.L. for Military (54) and 15 U.L. for Commercial (74)

Temperature Ranges. The Output HIGH drive factor is 25 U.L. for Military (54) and 65 U.L. for

Commercial (74) Temperature Ranges.

SN54/74LS253

DUAL 4-INPUT MULTIPLEXER

WITH 3-STATE OUTPUTS

LOW POWER SCHOTTKY

ORDERING INFORMATION

SN54LSXXXJ

Ceramic

SN74LSXXXN

Plastic

SN74LSXXXD

SOIC

J SUFFIX

CERAMIC

CASE 620-09

N SUFFIX

PLASTIC

CASE 648-08

16

1

16

1

16

1

D SUFFIX

SOIC

CASE 751B-03

LOGIC SYMBOL

VCC = PIN 16

GND = PIN 8

1 6 5 4 3 10 11 12 13 15

14

2

S0

S1

E0a I0a I1a I2a I3a I0b I1b I2b I3b E0b

Za

Zb

7

9