TECHNICAL DATA
IN74HC245A
Octal 3-State Noninverting
Bus Transceiver
High-Performance Silicon-Gate CMOS
The IN74HC245A is identical in pinout to the LS/ALS245. The
device inputs are compatible with standard CMOS outputs; with pullup
resistors, they are compatible with LS/ALSTTL outputs.
The IN74HC245A is a 3-state noninverting 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.
ORDERING INFORMATION
IN74HC245AN Plastic
IN74HC245ADW SOIC
TA = -55° to 125° C for all packages
•
•
•
•
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
PIN ASSIGNMENT
LOGIC DIAGRAM
FUNCTION TABLE
Control Inputs
PIN 20=VCC
Output
Enable
Direction
Operation
PIN 10 = GND
L
L
H
L
Data Transmitted
from Bus B to
Bus A
H
X
Data Transmitted
from Bus A to
Bus B
Buses Isolated
(High Impedance
State)
X = don’t care
301
INTEGRAL [ INTEGRAL CORP. ]
