ATA6629/ATA6631
LIN Bus Transceiver with Integrated Voltage Regulator
DATASHEET
Features
Supply voltage up to 40V
Operating voltage V = 5V to 27V
S
Typically 10A supply current during sleep mode
Typically 35A supply current in silent mode
Linear low-drop voltage regulator, 85mA current capability:
Normal, fail-safe, and silent mode
Atmel ATA6629: V = 3.3V 2%
CC
Atmel ATA6631: V = 5.0V 2%
CC
Sleep mode: V is switched off
CC
V undervoltage detection with reset open drain output NRES (4ms reset time)
CC
Voltage regulator is short-circuit and over-temperature protected
LIN physical layer according to LIN 2.0, 2.1 and SAEJ2602-2
Wake-up capability via LIN bus (90s dominant)
TXD time-out timer
Bus pin is overtemperature and short-circuit protected versus GND and battery
Advanced EMC and ESD performance
Fulfills the OEM hardware requirements for LIN in automotive applications rev.1.1
Interference and damage protection according to ISO7637
Package: SO8
9165F-AUTO-10/141. Description
Atmel ATA6629/ATA6631 is a fully integrated LIN transceiver, designed according to the LIN specification 2.0, 2.1 and
SAEJ2602-2, with a low-drop voltage regulator (3.3V/5V/85mA). The combination of voltage regulator and bus transceiver
makes it possible to develop simple, but powerful, slave nodes in LIN bus systems. ATA6629/ATA6631 is designed to
handle the low-speed data communication in vehicles (for example, in convenience electronics). Improved slope control at
the LIN driver ensures secure data communication up to 20kBaud. The bus output is designed to withstand high voltage.
Sleep mode and silent mode guarantee minimized current consumption even in the case of a floating or a short circuited
LIN-bus.
Figure 1-1. Block Diagram
1 VS
Atmel ATA6629/ATA6631
V
CC
5k
Normal and
RXD Receiver
5
Fail-safe
Mode
-
+
4
LIN
RF-filter
V
CC
Wake-up bus timer
Short-circuit and
overtemperature
protection
Slew rate control
TXD
TXD
6
Time-out
timer
8
VCC
Sleep
EN 7
2 NRES
Normal/Silent/
mode
Control
Fail-safe Mode
VCC
unit
3.3V/5V
switched
GND 3
off
Undervoltage reset
2 ATA6629/ATA6631 [DATASHEET]
9165FAUTO10/14