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KK74ACT643DW Datasheet(PDF) 1 Page - KODENSHI_AUK CORP.

Part # KK74ACT643DW
Description  Octal 3-State Bus Transceiver High-Speed Silicon-Gate CMOS
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Manufacturer  KODENSHI [KODENSHI_AUK CORP.]
Direct Link  http://www.kodenshi.co.kr
Logo KODENSHI - KODENSHI_AUK CORP.

KK74ACT643DW Datasheet(HTML) 1 Page - KODENSHI_AUK CORP.

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TECHNICAL DATA
KK74ACT643
Octal 3-State Bus Transceiver
High-Speed Silicon-Gate CMOS
ORDERING INFORMATION
KK74ACT643N Plastic
KK74ACT643DW SOIC
TA = -40° to 85° C for all packages
The KK74ACT643 is identical in pinout to the LS/ALS643,
HC/HCT643. The KK74ACT623 may be used as a level converter for
interfacing TTL or NMOS outputs to High Speed CMOS inputs.
The KK74ACT643 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.
• 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
PIN ASSIGNMENT
LOGIC DIAGRAM
PIN 20=VCC
PIN 10 = GND
FUNCTION TABLE
Control Inputs
Output
Enable
Direction
Operation
L
L
Data Transmitted
from Bus B to
Bus A
L
H
Data Transmitted
from Bus A to
Bus B (inverted)
H
X
Buses Isolated
(High Impedance
State)
X = don’t care
1


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