ATA6622 ATMEL Corporation, ATA6622 Datasheet

ATA6622

Manufacturer Part Number

ATA6622

Description

LIN Bus Transceiver with 3.3V (5V) Regulator and Watchdog

Manufacturer

ATMEL Corporation

Datasheet

1.ATA6622.pdf (28 pages)

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Features

•

1. Description

The ATA6622 is a fully integrated LIN transceiver, which complies with the LIN 2.0

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 func-

tionality as ATA6624 without a TXD time-out timer. The voltage regulator is able to

source 50 mA up to V

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 communica-

tion in vehicles, e.g., in convenience electronics. Improved slope control at the

LIN-driver ensures secure data communication up to 20 kBaud. Sleep Mode and

Silent Mode guarantee very low current consumption. The ATA6626 is able to switch

the LIN unlimited to dominant level via TXD for low data rates.

DRAFT

Master and Slave Operation Possible

Supply Voltage up to 40V

Operating voltage V

Typically 10 µA Supply Current During Sleep Mode

Typically 57 µA Supply Current in Silent Mode

Linear Low-drop Voltage Regulator:

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 Specification 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

– Normal, Fail-safe, and Silent Mode

– ATA6622 V

– ATA6624 V

– ATA6626 V

– In Sleep Mode V

= 3.3V ±2%

= 5.0V ±2%

= 5.0V ±2%, TXD Time-out Timer Disabled

= 5V to 27V

= 18V. The output current of the regulator can be boosted by

is Switched Off

LIN Bus

Transceiver

with 3.3V (5V)

Regulator and

Watchdog

ATA6622

ATA6624

ATA6626

Preliminary

4986B–AUTO–07/07

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