TECHNICAL DATA
IN74HC620A
Octal 3-State Inverting
Bus Transceiver
High-Performance Silicon-Gate CMOS
The IN74HC620A is identical in pinout to the LS/ALS620. The device
inputs are compatible with standard CMOS outputs; with pullup resistors,
they are compatible with LS/ALSTTL outputs.
The IN74HC620A is a 3-state transceiver that is used for 2-way
communication between data buses. Two separate enables are available.
The enable for bus A to B is active-high, the enable for bus B to A is
active-low.
ORDERING INFORMATION
IN74HC620AN Plastic
IN74HC620ADW SOIC
•
•
•
•
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 2.0 to 6.0 V
TA = -55° to 125° C for all packages
Low Input Current: 1.0 µA
High Noise Immunity Characteristic of CMOS Devices
PIN ASSIGNMENT
LOGIC DIAGRAM
FUNCTION TABLE
Control Inputs
Output
Enable
Direction
Operation
PIN 20=VCC
PIN 10 = GND
L
L
Data Transmitted
from Bus B to
Bus A (inverted)
H
H
Data Transmitted
from Bus A to
Bus B (inverted)
H
L
L
Buses Isolated
H
(High Impedance
State)
Rev. 00
IKSEMICON [ IK SEMICON CO., LTD ]
