ATA6628 Datasheet, PDF (1/36 Pages) ATMEL Corporation – Negative Trigger Input for Watchdog

Features
• Master and Slave Operation Possible
• Supply Voltage up to 40V
• Operating voltage V_S = 5V to 27V
• Typically 10 µA Supply Current During Sleep Mode
• Typically 40 µA Supply Current in Silent Mode
• Linear Low-drop Voltage Regulator:
– Normal, Fail-safe, and Silent Mode
• ATA6628 V_CC = 3.3V ±2%
• ATA6630 V_CC = 5.0V ±2%
– In Sleep Mode V_CC is Switched Off
• VCC- Undervoltage Detection (4 ms Reset Time) and Watchdog Reset Logical
Combined at Open Drain Output NRES
• High-speed Mode Up to 115 kBaud
• Internal 1:6 Voltage Divider for V_Battery Sensing
• Negative Trigger Input for Watchdog
• Boosting the Voltage Regulator Possible with an External NPN Transistor
• LIN Physical Layer According to LIN 2.0, 2.1 and SAEJ2602-2
• Wake-up Capability via LIN-bus, Wake Pin, or Kl_15 Pin
• INH Output to Control an External Voltage Regulator or to Switch off the Master Pull Up
Resistor
• Bus Pin is Overtemperature and Short-circuit Protected versus GND and Battery
• Adjustable Watchdog Time via External Resistor
• Advanced EMC and ESD Performance
• Fulfills the OEM “Hardware Requirements for LIN in Automotive Applications Rev.1.1”
• Interference and Damage Protection According ISO7637
• Package: QFN 5 mm × 5 mm with 20 Pins
LIN Bus
Transceiver
with 3.3V (5V)
Regulator and
Watchdog
ATA6628
ATA6630
Preliminary
1. Description
The ATA6628 is a fully integrated LIN transceiver, which complies with the LIN 2.0,
2.1 and SAEJ2602-2 specifications. It has a low-drop voltage regulator for
3.3V/50 mA output and a window watchdog. The ATA6630 has the same functionality
as the ATA6628; however, it uses a 5V/50 mA regulator. The voltage regulator is able
to source 50 mA, but the output current can be boosted by using an external NPN
transistor. This chip combination makes it possible to develop inexpensive, simple, yet
powerful slave and master nodes for LIN-bus systems. ATA6628/ATA6630 are
designed to handle the low-speed data communication in vehicles, e.g., in conve-
nience electronics. Improved slope control at the LIN-driver ensures secure data
communication up to 20 kBaud. Sleep Mode and Silent Mode guarantee very low cur-
rent consumption.
9117E–AUTO–07/10