54LVXC3245 Datasheet, PDF (1/10 Pages) National Semiconductor (TI) – 8-Bit Dual Supply Configurable Voltage Interface

February 1999
54LVXC3245
8-Bit Dual Supply Configurable Voltage Interface
Transceiver with TRI-STATE^® Outputs
General Description
The LVXC3245 is a 24-pin dual-supply, 8-bit configurable
voltage interface transceiver suited for real time configurable
I/O applications. The V_CCA pin accepts a 3V supply level.
The A port is a dedicated 3V port. The V_CCB pin accepts a
3V-to-5V supply level. The B port is configured to track the
V_CCB supply level respectively. A 5V level on the V_CC pin will
configure the I/O pins at a 5V level and a 3V V_CC will config-
ure the I/O pins at a 3V level. This device will allow the V_CCB
voltage source pin and I/O pins on the B port to float when
OE is HIGH. This feature is necessary to buffer data to and
from sockets that require live insertion and removal during
normal operation.
Features
n Bidirectional interface between 3V and 3V-to-5V buses
n Control inputs compatible with TTL level
n Outputs source/sink up to 24 mA
n Available in Cerpack and CDIP package
n Implements patented EMI reduction circuitry
n Flexible V_CCB operating range
n Allows B port and V_CCB to float simultaneously when OE
is HIGH
n Functionally compatible with the 54 series 245
n Standard Microcircuit Drawing (SMD) 5962-9861901
Ordering Code
Order Number
54LVXC3245W-QML
54LVXC3245J-QML
Package Number
W24A
J24F
Package Description
24-Lead (0.300" Wide) Ceramic Flatpack
24-Lead Ceramic Dual-in-line
Logic Symbol
Connection Diagram
Pin Assignment for
CDIP and Cerpack
DS101032-1
Pin Descriptions
Pin Names
OE
T/R
A₀– A₇
B₀– B₇
Description
Output Enable Input
Transmit/Receive Input
Side A Inputs or 3-STATE Outputs
Side B Inputs or 3-STATE Outputs
DS101032-2
TRI-STATE^® is a registered trademark of National Semiconductor Corporation
© 1999 National Semiconductor Corporation DS101032
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