ams has hailed its new AS8530 as the world’s first miniature power/transceiver IC to support LIN slave applications, which complies with the ISO 26262 functional safety standard.
The IC is a power management and communication device that includes a LIN 2.1 transceiver, a 50 mA LDO to supply a local microcontroller and a reset generator in an 8-pin SOIC 8 package. It offers a host of system management functions through a shared pin serial interface.
The addition of enhanced diagnostic functions provides built-in support for the requirements of ISO 26262. A two-wire serial port routed through shared Enable and TX pins allows the device to read out status registers and provide diagnosis information to the system’s microcontroller.
It also supports additional features such as a window watchdog function and access to backup registers to store data when the microcontroller shuts down. These features are crucial in the design of ISO 26262-compliant systems, which must be able to cease operation safely when in a fault condition, before the vehicle is at risk of endangering passengers or other road users.
The AS8530 is suitable for any LIN-networked sensor and actuator slaves including those found in door modules, sunroofs and headlight positioning units. It is ideally suited for safety-critical systems that require an ASIL grading under the provisions of the ISO 26262 standard.
The on-chip LDO provides a factory-selectable 3,3 V or 5 V output. The chip also offers a reset generator and an output voltage monitor and has a unique chip ID to support traceability requirements. Power-saving standby and sleep modes, as well as the normal operating mode, can be triggered via the Enable pin.
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