54LCX245
Low Voltage Bidirectional Transceiver with 5V Tolerant
Inputs and Outputs
General Description
The LCX245 contains eight non-inverting bidirectional buff-
ers with TRI-STATE™ outputs and is intended for bus ori-
ented applications. The device is designed for low voltage
(3.3V) V
CC
applications with capability of interfacing to a 5V
signal environment. The T/R input determines the direction
of data flow through the device. The OE input disables both
the A and B ports by placing them in a high impedance state.
The LCX245 is fabricated with an advanced CMOS technol-
ogy to achieve high speed operation while maintaining
CMOS low power dissipation.
Features
n 5V tolerant inputs and outputs
n 9ns t
PD
max, 10µA I
CCQ
max
n Power down high impedance inputs and outputs
n Supports live insertion/withdrawal
n 2.0V–3.6V V
CC
supply operation
n ±24 mA output drive
n Implements patented noise/EMI reduction circuitry
n Functionally compatible with the 54 series 245
n ESD performance:
Human body model > 2000V
Machine model > 200V
n Standard Microcircuit Drawing (SMD) 5962-97543
Logic Symbols
Pin Descriptions
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
Connection Diagram
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
DS101022-1
Pin Assignment
for DIP and Cerpack
DS101022-3
Pin Assignment
for LCC
DS101022-6
December 1998
54LCX245
Low
V
oltage
Bidirectional
T
ransceiver
with
5V
T
olerant
Inputs
and
Outputs
© 1998 National Semiconductor Corporation DS101022 www.national.com