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IN74ACT251 Datasheet(PDF) 1 Page - Integral Corp.

Part No. IN74ACT251
Description  8-INPUT DATA SELECTOR/MULTIPLEXER WITH 3-STATE OUTPUTS
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Manufacturer  INTEGRAL [Integral Corp.]
Direct Link  http://www.iksemi.com/
Logo INTEGRAL - Integral Corp.

IN74ACT251 Datasheet(HTML) 1 Page - Integral Corp.

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IN74ACT251
1
8-INPUT DATA SELECTOR/MULTIPLEXER
WITH
3-STATE OUTPUTS
High-Speed Silicon-Gate CMOS
The IN74ACT251 is identical in pinout to the LS/ALS251,
HC/HCT251. The IN74ACT251 may be used as a level converter
for interfacing TTL or NMOS outputs to High Speed CMOS inputs.
The device selects one of the eight binary Data Inputs, as
determined by the Address Inputs. The Output Enable pin must be
at a low level for the selected data to appear at the outputs. If
Output Enable is high, the Y and the Y outputs are in the high-
impedance state. This 3-State feature allows the IN74ACT251 to
be used in bus-oriented systems.
• TTL/NMOS Compatible Input Levels
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 4.5 to 5.5 V
• Low Input Current: 1.0 µA; 0.1 µA @ 25°C
• Outputs Source/Sink 24 mA
ORDERING INFORMATION
IN74ACT251N Plastic
IN74ACT251D SOIC
TA = -40° to 85° C for all
packages
PIN ASSIGNMENT
FUNCTION TABLE
Inputs
Outputs
A2 A1
A0
Output
Enable
Y
Y
X
X
X
H
Z
Z
L
L
L
L
D0
0
D
L
L
H
L
D1
1
D
L
H
L
L
D2
2
D
L
H
H
L
D3
3
D
H
L
L
L
D4
4
D
H
L
H
L
D5
5
D
H
H
L
L
D6
6
D
H
H
H
L
D7
7
D
D0,D1...D7=the level of the
respective D input
Z = high-impedance state
X = don’t care
LOGIC DIAGRAM
PIN 16 =VCC
PIN 8 = GND


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