Atmel's ATA6628 is a fully integrated LIN bus transceiver that is compatible with the LIN2.0, LIN2.1 and SAEJ2602-2 standards. It features a low-dropout regulator with 3.3V/50mA output and a window watchdog. The ATA6630 has the same features as the ATA6628, but it uses a 5V/50mA regulator. The regulator can use a 50mA current source, and the output current can be increased with an external NPN transistor. This combination of chips makes it possible to develop inexpensive, simple and powerful master-slave nodes for LIN bus systems. This article refers to the address: http:// The ATA6628/ATA6630 is used to handle low speed data communications in vehicles. Improved slope control on the LIN drive ensures secure data communication up to 20kBaud. Sleep mode and silent mode guarantee extremely low current consumption. Figure 1 ATA6628 / ATA6630 block diagram Figure 2 ATA6628 / ATA6630 application circuit diagram ATA6628/ATA6630 main features "Achievable master and slave working modes " Power supply up to 40V " Operating voltage VS is 5V to 27V " Typical supply current in sleep mode is 10μA " Typical supply current in silent mode is 40μA Linear Low Dropout Regulator - Normal, fail-safe and silent mode ATA6628VCC=3.3V±2% ATA6630VCC=5.0V±2% "VCC is cut off in sleep mode "VCC undervoltage detection (4mm reset time) and watchdog reset logic combination at open-drain output NRES "High speed mode up to 115kBaud "Internal 1:6 voltage divider for VBattery detection "Negative trigger pulse input for the watchdog "Boost Regulators with External NPN Transistors "LIN physical layer obeys LIN2.0, LIN2.1 and SAEJ2602-2 standards "Wake-up via the LIN bus, Wake pin or K1_15 pin "INH output is used to control an external regulator or to cut off the main node pull-up resistor "Bus pin overheat and short circuit protection against GND and battery "Adjustable watchdog time via external resistors "Advanced EMC and ESD performance " According to STM5.1, ESDHBM8kV is available at pins LIN and VS "Package: 20-Pin 5mm x 5mm QFN Package
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