TECHNICAL DATA
Octal 3-State Noninverting
Bus Transceiver
High-Speed Silicon-Gate CMOS
IN74AC623
The IN74AC623 is identical in pinout to the LS/ALS623,
HC/HCT623. The device inputs are compatible with standard CMOS
outputs; with pullup resistors, they are compatible with LS/ALS
outputs.
The IN74AC623 is a 3-state noninverting 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.
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 2.0 to 6.0 V
• Low Input Current: 1.0 µA; 0.1 µA @ 25°C
• High Noise Immunity Characteristic of CMOS Devices
• Outputs Source/Sink 24 mA
ORDERING INFORMATION
IN74AC623N Plastic
IN74AC623DW SOIC
TA = -40° to 85° C for all packages
PIN ASSIGNMENT
LOGIC DIAGRAM
PIN 20=VCC
PIN 10 = GND
486
FUNCTION TABLE
Control Inputs
Output Direction
Enable
L
L
H
H
H
L
L
H
Operation
Data Transmitted
from Bus B to
Bus A
Data Transmitted
from Bus A to
Bus B
Buses Isolated
(High Impedance
State)