ATA6622_09 Datasheet, PDF (1/29 Pages) ATMEL Corporation – LIN Bus Transceiver with 3.3V (5V) Regulator and 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 57 µA Supply Current in Silent Mode
• Linear Low-drop Voltage Regulator:
– Normal, Fail-safe, and Silent Mode
– ATA6622 V_CC = 3.3V ±2%
– ATA6624 V_CC = 5.0V ±2%
– ATA6626 V_CC = 5.0V ±2%, TXD Time-out Timer Disabled
– 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
• 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
• TXD Time-out Timer; ATA6626: TXD Time-out Timer Is Disabled
• Bus Pin is Overtemperature and Short Circuit Protected versus GND and Battery
• Adjustable Watchdog Time via External Resistor
• Advanced EMC and ESD Performance
• ESD HBM 8 kV at Pins LIN and VS According to STM5.1
• Package: QFN 5 mm × 5 mm with 20 Pins
LIN Bus
Transceiver
with 3.3V (5V)
Regulator and
Watchdog
ATA6622
ATA6624
ATA6626
1. Description
The ATA6622 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 ATA6624 has the same functionality
as the ATA6622; however, it uses a 5V/50 mA regulator. The ATA6626 has the same
functionality as ATA6624 without a TXD time-out timer. 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. ATA6622/ATA6624/ATA6626
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. The ATA6626 is able to switch the LIN unlimited to dominant level
via TXD for low data rates.
4986G–AUTO–09/09