ATA6621 ATMEL Corporation, ATA6621 Datasheet

ATA6621

Manufacturer Part Number

ATA6621

Description

Manufacturer

ATMEL Corporation

Datasheet

1.ATA6621.pdf (26 pages)

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Features

•

1. Description

The ATA6621 is a fully integrated LIN transceiver, complying with the LIN specifica-

tion, and with a low-drop voltage regulator for 5V/50 mA output and a window

watchdog adjustable via an external resistor. In this QFN20 package, the voltage reg-

ulator is able to source 50 mA at V

The output current of the regulator can be boosted by using an external NPN transis-

tor. This combination makes it possible to develop simple, but powerful and cheap,

slave nodes in LIN bus systems. ATA6621 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 20 kBaud. The bus

output is capable of withstanding 60V. Sleep Mode and Silent Mode guarantee a very

low current consumption.

Supply Voltage up to 40V

Operating Voltage V

Slew Rate Control according to LIN Specification 2.0

Supply Current during Sleep Mode Typically 10 µA

Supply Current in Silent Mode Typically 40 µA

Linear Low-drop Voltage Regulator:

Combined at Output NRES

Possibility of Boosting the Voltage Regulator with an External NPN Transistor

LIN Physical Layer according to LIN Specification 2.0

Wake-up Capability via LIN Bus or WAKE Pin

Wake-up Recognition

TXD Time-out Timer

60V Load Dump Protection at LIN Pin

Bus Pin is Overtemperature and Short Circuit Protected versus GND and Battery

Adjustable Watchdog Time via External Resistor

Positive and Negative Trigger Input for Watchdog

5V CMOS Compatible I/O Pins to MCU

Analog Temperature Monitor Output

High EMC and ESD Level

Package: QFN 5

– Normal Mode: V

– Silent Mode: V

– Sleep Mode: V

Undervoltage Detection (10 ms Reset time) and Watchdog Reset Logically

5 with 20 Pins

is Switched Off

= 5V to 18V

= 5V ±7%/50 mA

= 5V ±2%/50 mA

= 18V even at an ambient temperature of 105°C.

LIN Transceiver

with 5V

Regulator and

Watchdog

ATA6621

Rev. 4887B–AUTO–01/06

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