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SL74HC640D Datenblatt(PDF) 1 Page - System Logic Semiconductor

Teilenummer SL74HC640D
Bauteilbeschribung  Octal 3-State Inverting Bus Transceiver(High-Performance Silicon-Gate CMOS
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Hersteller  SLS [System Logic Semiconductor]
Direct Link  http://www.slsemicon.co.kr/e_index.htm
Logo SLS - System Logic Semiconductor

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SL74HC640
System Logic
Semiconductor
SLS
Octal 3-State Inverting Bus Transceiver
High-Performance Silicon-Gate CMOS
The SL74HC640 is identical in pinout to the LS/ALS640. The device
inputs are compatible with standard CMOS outputs; with pullup
resistors, they are compatible with LS/ALSTTL outputs.
The SL74HC640 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
• High Noise Immunity Characteristic of CMOS Devices
ORDERING INFORMATION
SL74HC640N Plastic
SL74HC640D SOIC
TA = -55
° to 125° 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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