TL/F/12573
74LCX2245
Low-Voltage
Bidirectional
Transceiver
with
5V
Tolerant
Inputs
and
Outputs
ADVANCE INFORMATION
November 1996
74LCX2245
Low-Voltage Bidirectional Transceiver
with 5V Tolerant Inputs and Outputs
General Description
The LCX2245 contains eight non-inverting bidirectional buff-
ers with TRI-STATE outputs and is intended for bus orient-
ed 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 25X-series resistor helps reducing output over-
shoot and undershoot.
The LCX2245 is fabricated with an advanced CMOS tech-
nology to achieve high speed operation while maintaining
CMOS low power dissipation.
Features
Y
5V tolerant inputs and outputs
Y
10 mAI
CCQ
max
Y
Power down high impedance inputs and outputs
Y
25X-series resistor on outputs
Y
Supports live insertion/withdrawal
Y
2.0V–3.6V V
CC
supply operation
Y
g12 mA output drive
Y
Implements patented Quiet Series
TM
noise/EMI
reduction circuitry
Y
Functionally compatible with the 74 series 245
Y
Latch-up performance exceeds 500 mA
Y
ESD performance:
Human body model
l
2000V
Machine model
l
200V
Logic Symbols Connection Diagram
TL/F/12573–1
IEEE/IEC
TL/F/12573–2
Pin Assignment
for SOIC, SSOP and TSSOP
TL/F/12573–3
Pin Names Description
OE Output Enable Input
T/R Transmit/Receive Input
A
0
–A
7
Side A Inputs or TRI-STATE Outputs
B
0
–B
7
Side B Inputs or TRI-STATE Outputs
TRI-STATE is a registered trademark of National Semiconductor Corporation.
Quiet SeriesTM is a trademark of National Semiconductor Corporation.
C
1996 National Semiconductor Corporation RRD-B30M17/Printed in U. S. A. http://www.national.com