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SN54LS253 DUAL 4-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS Motorola
Motorola => Freescale Motorola
SN54LS253 Datasheet PDF : 5 Pages
1 2 3 4 5
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.
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)
VCC E0b S0 I3b I2b I1b I0b Zb
16 15 14 13 12 11 10 9
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
12
3
4
56
78
E0a S1 I3a I2a I1a I0a Za GND
SN54/74LS253
DUAL 4-INPUT MULTIPLEXER
WITH 3-STATE OUTPUTS
LOW POWER SCHOTTKY
16
1
16
1
16
1
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
D SUFFIX
SOIC
CASE 751B-03
PIN NAMES
LOADING (Note a)
HIGH
LOW
S0, S1
Common Select Inputs
Multiplexer A
0.5 U.L.
0.25 U.L.
E0a
I0a – I3a
Za
Multiplexer B
Output Enable (Active LOW) Input
Multiplexer Inputs
Multiplexer Output (Note b)
0.5 U.L.
0.25 U.L.
0.5 U.L.
0.25 U.L.
65 (25) U.L. 15 (7.5) U.L.
E0b
I0b – I3b
Zb
Output Enable (Active LOW) Input
Multiplexer Inputs
Multiplexer Output (Note b)
0.5 U.L.
0.25 U.L.
0.5 U.L.
0.25 U.L.
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.
ORDERING INFORMATION
SN54LSXXXJ
SN74LSXXXN
SN74LSXXXD
Ceramic
Plastic
SOIC
LOGIC SYMBOL
1 6 5 4 3 10 11 12 13 15
14
S0E0a I0a I1a I2a I3a I0b I1b I2b I3b E0b
2
S1
Za
Zb
7
9
VCC = PIN 16
GND = PIN 8
FAST AND LS TTL DATA
5-416
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