Atmel has announced the availability of two new transceiver families for LIN automotive networking applications.
Featuring low-power wake-up management, the new families serve automotive body electronics applications such as door modules, seat control or intelligent sensors, and powertrain applications such as engine control systems. In addition, the ATA6663/64 transceivers are suited for other body electronic applications where low-speed data communication and low cost are important.
The ATA6663 and ATA6664 are standalone LIN bus transceiver ICs, while the ATA6628/29/30/31 LIN transceivers are system basis chips (SBCs). When compared to a standalone LIN transceiver, SBCs are more integrated to include a voltage regulator, a watchdog timer (WDT) and precise voltage divider for supply voltage measurements. The devices' low-power management also enables mixed-supplied LIN bus systems and short-circuit-to-ground at the LIN bus with lower power consumption.
These new LIN devices are designed with Atmel's high-voltage BCD-on-SOI (SMART-I.S.) process and optimised for operations up to 40 V for applications in harsh environments. They combine enhanced EMC robustness (EMC test and conformance test LIN2.1, Europe, and SAE J2602-2, US) and ESD protection exceeding 6 kV.
Due to an implemented high-speed transmission mode, the ATA6628/30 devices also allow LIN bus programming at the band end test bench. These ICs provide several protective features such as over-temperature shutdown and full protection against short circuits. The ATA628/29/30/31 devices meet strict automotive qualification demands and can withstand transients according to ISO/TR 7637/1.
The ATA6663/64 comply with the LIN2.1 standard as well as the common EMC requirements V1.1, and can handle supply voltages of up to 40 V. The fully integrated LIN transceiver interfaces to the LIN protocol handler (ie, the local microcontroller) and the LIN bus. Improved slope control at the LIN bus ensures secure data communication of up to 20 Kbps using an RC oscillator for the protocol handling. Due to its disabled TxD dominant time-out timer, the ATA6664 enables ultra-low speed transmission and therefore is suited for MOST ECL bus systems. The sleep mode minimises current consumption to typically 10 μA. The ATA6663 and ATA6664 are compatible with 3,3 V and 5 V devices and include a dominant time-out function on the TxD pin to prevent the bus line from being driven permanently in a dominant state.
To eliminate EMI problems, the ATA6663/64 incorporate a controlled slew rate. The receiver's input filter helps minimise RF interference caused by signals on the bus line. Furthermore, the new devices provide several protection features such as over-temperature shutdown, full protection against short circuits, and high-voltage-bus-line protection up to 40 V. Similar to the ATA628/29/30/31, these devices meet the strict automotive qualification demands and can withstand transients according to ISO/TR 7637/1.
For more information contact EBV Electrolink, +27 (0)21 402 1940, capetown@ebv.com, www.ebv.com
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