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54LVXC4245 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. 54LVXC4245
Description  8-Bit Dual Supply Configurable Voltage Interface Transceiver with TRI-STATE Outputs
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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54LVXC4245 Datasheet(HTML) 1 Page - National Semiconductor (TI)

   
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54LVXC4245
8-Bit Dual Supply Configurable Voltage Interface
Transceiver with TRI-STATE® Outputs
General Description
The LVXC4245 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 5V supply level.
The “A” port is a dedicated 5V 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 VCC 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 a socket that permits live insertion and removal during
normal operation.
Features
n Bidirectional interface between 5V 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 packages
n Implements patented EMI reduction circuitry
n Flexible VCCB operating range
n Allows B port and VCCB to float simultaneously when OE
is HIGH
n Functionally compatible with the 54 series 245
n Standard Microcircuit Drawing (SMD) 5962-9862001
Ordering Code
Order Number
Package Number
Package Description
54LVXC4245W-QML
W24C
24-Lead Ceramic Flatpack
54LVXC4245J-QML
J24F
24-Lead Ceramic Dual-in-line
Logic Symbol
Pin Descriptions
Pin Names
Description
OE
Output Enable Input
T/R
Transmit/Receive Input
A
0–A7
Side A Inputs or TRI-STATE Outputs
B
0–B7
Side B Inputs or TRI-STATE Outputs
Connection Diagram
TRI-STATE® is a registered trademark of National Semiconductor Corporation
DS101033-1
Pin Assignment
for Cerpack and CDIP
DS101033-2
March 1999
© 1999 National Semiconductor Corporation
DS101033
www.national.com


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