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SN54LS253 Datasheet(Scheda tecnica) 1 Page - Motorola, Inc

Numero della parte SN54LS253
Dettagli  DUAL 4-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS
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Produttore  MOTOROLA [Motorola, Inc]
Homepage  http://www.freescale.com
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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.
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)
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




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