TECHNICAL DATA
IN74LS245
Octal 3-State Noninverting
Bus Transceiver
These octal bus transceiver are designed for asynchronous two-way
communication between data buses. The control function implementation
minimized external timing requirements.
The device allows data transmission from the A bus to the B bus or
from the B bus to the A bus depending upon the logic level at the
directional control (DIR) input. The enable input(E) can be used to
disable the device so that the buses are effectively isolated.
•
Bidirectional Bus Transceiver in a High-Density 20-Pin Package
•
3-state Outputs Dirve Bus Lines Directly
•
P-N-P Inputs D-C Loading on Bus Lines
•
Hysteresis at Bus Inputs Improve Noise Margins
•
Typical Propagation Delay Times; Port to Port ... 8 ns
ORDERING INFORMATION
IN74LS245N Plastic
IN74LS245DW SOIC
T
A
= 0° to 70° C for all packages
PIN ASSIGNMENT
LOGIC DIAGRAM
FUNCTION TABLE
Control Inputs
Output
Enable
L
Direction
L
Operation
Data Transmitted
from Bus B to
Bus A
Data Transmitted
from Bus A to
Bus B
Buses Isolated
(High Impedance
State)
PIN 20=V
CC
PIN 10 = GND
L
H
H
X
X = don’t care
1
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