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IN74AC640 Datasheet(PDF) 1 Page - Integral Corp.

Part No. IN74AC640
Description  Octal 3-State Inverting Bus Transceiver
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Maker  INTEGRAL [Integral Corp.]
Homepage  http://www.iksemi.com/
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IN74AC640 Datasheet(HTML) 1 Page - Integral Corp.

   
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TECHNICAL DATA
496
Octal 3-State Inverting
Bus Transceiver
High-Speed Silicon-Gate CMOS
The IN74AC640 is identical in pinout to the LS/ALS640,
HC/HCT640. The device inputs are compatible with standard CMOS
outputs; with pullup resistors, they are compatible with LS/ALS
outputs.
The IN74AC640 is a 3-state transceiver that is used for 2-way
asynchronous communication between data buses. The device has an
active-low Output Enable pin, which is used to place the I/O ports into
high-impedance states. The Direction control determines whether data
flows from A to B or from B to A.
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 2.0 to 6.0 V
• Low Input Current: 1.0 µA; o.1 µA @ 25°C
• High Noise Immunity Characteristic of CMOS Devices
• Outputs Source/Sink 24 mA
IN74AC640
ORDERING INFORMATION
IN74AC640N Plastic
IN74AC640DW SOIC
TA = -40° to 85° C for all
packages
PIN ASSIGNMENT
FUNCTION TABLE
Control Inputs
Output
Enable
Direction
Operation
L
L
Data Transmitted
from Bus B to
Bus A (inverted)
L
H
Data Transmitted
from Bus A to
Bus B (inverted)
H
X
Buses Isolated
(High Impedance
State)
X = don’t care
LOGIC DIAGRAM
PIN 20=VCC
PIN 10 = GND


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