54LVX4245_993 Datasheet, PDF (1/8 Pages) National Semiconductor (TI) – 8-Bit Dual Supply Translating Transceiver with TRI-STATE Outputs

March 1999
54LVX4245
8-Bit Dual Supply Translating Transceiver with
TRI-STATE^® Outputs
General Description
The LVX4245 is a dual-supply, 8-bit translating transceiver
that is designed to interface between a 5V bus and a 3V bus
in a mixed 3V/5V supply environment. The Transmit/Receive
(T/R) input determines the direction of data flow. Transmit
(active-HIGH) enables data from A ports to B ports; Receive
(active-LOW) enables data from B ports to A ports. The
Output Enable input, when HIGH, disables both A and B
ports by placing them in a TRI-STATE condition. The A port
interfaces with the 5V bus; the B port interfaces with the 3V
bus.
The LVX4245 is suitable for mixed voltage applications such
as systems using 3.3V memories which must interface with
existing buses or other components operating at 5.0V.
Features
n Bidirectional interface between 5V and 3V buses
n Control inputs compatible with TTL level
n 5V data flow at A port and 3V data flow at B port
n Outputs source/sink 24 mA
n Available in Ceramic DIP and Flatpack packages
n Implements patented EMI reduction circuitry
n Functionally compatible with the 54 series 245
n Standard Microcircuit Drawing (SMD) 5962-9860601
Ordering Code
Order Number
54LVX4245J-QML
54LVX4245W-QML
Logic Symbol
Package Number
J24F
W24C
Package Description
24-Lead Ceramic Dual-in-line
24-Lead Cerpack
Connection Diagram
Pin Assignment for
CDIP and Cerpack
DS101021-1
Pin Descriptions
Pin Names
OE
T/R
A₀–A₇
B₀–B₇
Description
Output Enable Input
Transmit/Receive Input
Side A Inputs or TRI-STATE Outputs
Side B Inputs or TRI-STATE Outputs
DS101021-2
TRI-STATE^® is a registered trademark of National Semiconductor
© 2001 National Semiconductor Corporation DS101021
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