Atmel Corporation has introduced the ATA6662. It is a standalone LIN2.0 bus transceiver IC with what the company says is the industry's best EMC performance, per EMC test and conformance test LIN2.0 in Europe and SAE J2602-2 in the United States.
Manufactured on the company's SMARTIS high-voltage BCD-on-SOI process (mixed-signal technology with bipolar, CMOS and DMOS components on silicon-on-insulator technology), the device offers better than 6 kV ESD protection for automotive comfort applications such as door modules, power seat controls, intelligent sensors, and other body electronic applications where low-speed data communication is sufficient and low cost is important.
The ATA6662 complies with the LIN2.0 standard and can handle supply voltages of up to 40 V. The integrated LIN transceiver interfaces the LIN protocol handler (typically the local microcontroller) and the LIN bus. Improved slope control at the LIN bus is said to ensure secure data communication of up to 20 kBaud using an RC oscillator for protocol handling. The ATA6662's sleep mode minimizes current consumption to typically 10 µA.
The ATA6662 uses a controlled slew rate to eliminate EMI problems. The receiver's input filter helps minimize RF interference caused by signals on the bus line. Atmel said its BCD-on-SOI process results in exceptionally low leakage current, significantly reduced crosstalk between analog and digital circuits on the same die, and latch-up-free operation at high temperatures.
Lower parasitic effects give added value for EMC performance.
Protection features include over-temperature shutdown, full protection against short circuits, and high-voltage-bus-line protection up to 40 V. The ATA6662 is fully compatible with 3.3 V and 5 V devices and includes a dominant time-out function on the TxD pin to prevent the bus line from being driven permanently in a dominant state. A wake-up source recognition indicates on 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. The device also meets strict automotive qualification demands and can withstand transients according to ISO/TR 7637/1. Samples of the new LIN transceiver IC ATA6662 in SO8 packages are available. Pricing starts at $ 0.45 for 10k units.