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Atmel transceiver IC complies with LIN2.0 standard

Posted: 30 Jun 2004 ?? ?Print Version ?Bookmark and Share

Keywords:atmel? bus transceiver ic? ata6661? bcdmos?

Atmel Corp.'s new standalone LIN bus transceiver IC complies with the new LIN2.0 standard, and provides an ESD protection of 5kV. To meet the 42V powernet requirements, the bus output can tolerate short circuits of up to 60V.

Manufactured using the company's 0.8?m BCDMOS process technology, the ATA6661 is designed for operation up to 40V and applications in harsh environments such as door modules, seat control or intelligent sensors. It interfaces the LIN protocol handler and the LIN bus. Improved slope control at the LIN bus ensures secure data communication of up to 20Kbaud with an RC oscillator for the protocol handling, and the sleep mode guarantees a typical current consumption of 10?A.

According to Atmel, current LIN1.3 transceivers do not meet the requirements of the forthcoming low-cost, RC-oscillator-based slave nodes with high bit rates. It said that LIN2.0 enables next generation of LIN-based automotive applications and also ensures the interoperability with current LIN1.3 implementations.

"With this new LIN transceiver, Atmel specifically addresses the need for handling the low-speed data communication in vehicles, for example in convenience electronics," said Torsten Mann, marketing director for automotive and control products.

To minimize EMC problems, the ATA6661 incorporates a controlled slew rate according to the LIN specification 2.0. The receiver's input filter also helps to reduce RF interference caused by signals on the bus line to a minimum.

Additionally, the ATA6661 provides several protection features such as overtemperature shutdown, full protection against short circuits and high-voltage-bus-line protection up to 60V. It is fully compatible with 3.3V and 5V devices, and includes a dominant time-out function at the TxD pin to prevent the bus line from being driven permanently in dominant state. A wake-up source recognition indicates at the TxD and RxD pins which wake-up has occurred, the local via pin WAKE-UP or the remote wake-up via the LIN bus line. Depending on the recognized wake-up source, the microcontroller selects the appropriate routines.

Samples of the LIN transceiver IC in SO8 packages are already available, with pricing beginning at 55 cents in 10,000-unit quantities.





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