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 (E
0
) 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.
• Schottky Process for High Speed
• Multifunction Capability
• Non-Inverting 3-State Outputs
• Input Clamp Diodes Limit High Speed Termination Effects
CONNECTION DIAGRAM DIP (TOP VIEW)
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
PIN NAMES LOADING (Note a)
HIGH LOW
S
0
, S
1
Common Select Inputs 0.5 U.L. 0.25 U.L.
Multiplexer A
E
0a
Output Enable (Active LOW) Input 0.5 U.L. 0.25 U.L.
I
0a
–I
3a
Multiplexer Inputs 0.5 U.L. 0.25 U.L.
Z
a
Multiplexer Output (Note b) 65 (25) U.L. 15 (7.5) U.L.
Multiplexer B
E
0b
Output Enable (Active LOW) Input 0.5 U.L. 0.25 U.L.
I
0b
–I
3b
Multiplexer Inputs 0.5 U.L. 0.25 U.L.
Z
b
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
