Preliminary
Subject to Change without Notice
February 9, 2004
Datasheet
A8423-DS Rev
.0
A8423
LIN Bus Transceiver with Integrated Voltage Regulator
The A8423 provides the physical interface requirements of the LIN
(Local Interconnect Network) serial communications bus plus an inte-
grated voltage regulator that is permanently enabled. These allow the
development of simple, inexpensive slave nodes in a LIN-Bus system.
The LIN transceiver is compatible with LIN-Bus systems that conform
to the LIN Protocol Specifi cation, Revision 1.2. It provides all the
necessary interface and timing control to convert signals to and from
the bidirectional LIN Bus to individual transmit and receive signals at
logic-compatible levels.
The A8423 provides regulated 5V output with a current limit in excess
of 50 mA. This is suffi cient to power a microcontroller handling the
LIN slave node protocol.
The A8423 is supplied in 8-lead plastic SOIC (part number suffi x L).
null Compatible with LIN Bus, Revision 1.2 systems
null Data rate up to 20 kbaud
null Normal operation from 7 to 30 V
null Handles 40 V transients during load dump
null Handles automotive transients per ISO 7637
null Unpowered node does not disturb the network
null 4 kV (hbm) ESD protection on LIN and WAKE pins
null Low quiescent current regulator for slave microcontroller supply
null Interface to slave microcontroller
null 8-pin small outline surface mount package
Use the following complete part number when ordering:
AB SO LUTE MAX I MUM RAT INGS
Part Number Package Description
A8423KL 8-lead, SOIC Continuous voltage regulator
Supply Voltage, VSUP Continuous.....................30 V
Supply Voltage, VSUP Transient (500 ms).........40 V
LIN Bus Voltage, LIN...........................–18 to +40 V
Wake Pin ...............................................–18 to +40 V
Logic Pins: RX, TX, EN ...................... –0.3 V to 7 V
Package Power Dissipation, P
D
......see chart, page 6
Operating Temperature Range
Ambient Temperature, T
A
..........–40°C to +125°C
Junction Temperature, T
J
...........–55°C to +150°C
Storage Temperature, T
S
..........–55°C to +150°C
FEATURES
A8423
SOIC
2
3
4
1
7
6
5
8RX
EN
WAKE
TX
VREG
VSUP
LIN
GND
Control
Regulator
APPLICATIONS
Automotive, industrial, and consumer LIN-Bus systems