IN74ACT623
OCTAL 3-STATE NONINVERTING
BUS TRANSCEIVER
High-Speed Silicon-Gate CMOS
The IN74ACT623 is identical in pinout to the LS/ALS623,
HC/HCT623. The IN74ACT623 may be used as a level converter
for interfacing TTL or NMOS outputs to High Speed CMOS
inputs.
The IN74ACT623 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.
• 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
ORDERING INFORMATION
IN74ACT623N Plastic
IN74ACT623DW SOIC
TA = -40° to 85° C for all
packages
PIN ASSIGNMENT
LOGIC DIAGRAM
FUNCTION TABLE
Control Inputs
Output Direction
Enable
Operation
L
L
Data
Transmitted
from Bus B to
Bus A
PIN 20=VCC
PIN 10 = GND
H
H
Data
Transmitted
from Bus A to
Bus B
H
L
L
H
Buses Isolated
(High
Impedance
State)
1
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