Datasheet

©2000 Fairchild Semiconductor Corporation www.fairchildsemi.com
74LCXR2245 Rev. 1.2.0 2
74LCXR2245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs and 26
Ω
Series Resistors
on Both A and B Ports
Connection Diagram
Pin Description
Logic Symbol
Truth Table
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
Note:
2. Unused bus terminals during HIGH Z State must be
held HIGH or LOW.
Logic Diagram
Pin Names Description
OE
Output Enable Input
T/R
Transmit/Receive Input
A
0
–A
7
Side A Inputs or 3-STATE Outputs
B
0
–B
7
Side B Inputs or 3-STATE Outputs
Inputs
OutputsOE T/R
LLBus B
0
– B
7
Data to Bus A
0
– A
7
LHBus A
0
– A
7
Data to Bus B
0
– B
7
HXHIGH Z State on A
0
– A
7
, B
0
– B
7
(2)