LIN slave MLX80105 enables easy Local Interconnect Network communication of switch modules and IO-Extensions

13 DECEMBER 2011

Melexis extends its family of smart LIN slave IC’s with a new Generation of reconfigurable LIN switch slave. The LIN bus standard, and it’s SAE version, J2602 experience rapid growth in automotive networking due to the cost effective and robust nature of the protocol and its compatibility to CAN bus. The MLX80105 connects any door, roof, seat, steering wheel, dashboard, HVAC, light control or similar switch module requiring easy access via LIN. The integration of LIN physical layer, voltage regulator and integrated application IO’s result in a reduction in component cost. The integration of LIN controller and approved LIN driver make switch modules speak LIN in no time.

Incorporating the Melexis LIN transceiver physical layer, Melexis LIN ASSPs (Application Specific Standard Products) guarantee world leading integrated ESD protection results. The LIN protocol handler meets all LIN standards like LIN2.0, LIN2.1 as well as SAE J2602.
The MLX80105 is a fully integrated LIN slave on a single chip. All of the necessary components; physical layer LIN transceiver, LIN controller, voltage regulator, application controller are integrated along with the supporting functions ADC, PWM generation and high voltage capable IOs. This high integration level reduces the BOM dramatically and enables the development of very compact and small LIN slave modules.
Application software tasks are taken up by a 16-bit RISC microcontroller.
The MLX80105 draws less than 50uA of current in sleep mode and it is wake-up capable via the LIN Bus as well as via connected switches or other wake-up sources. The LIN slave supports switches in matrix as well as single switch configurations connected to the 18 available IOs. All IOs are high voltage resistant for safely supporting remote off module connections. Via eight interrupt capable IOs rotary encoder are supported. Position monitoring and control for control dials and knobs, motors or actuators is dramatically simplified with added appeal to have direct physical input or software control and signal sharing among different systems. Analog inputs can convert any analog signal, like resistive encoders and resistive switches, to BUS messages for use by network connected devices. An internal battery monitor enables supply voltage dependent functions.
To illuminate the switch module panel, 8 open drain PWM outputs are available with configurable PWM base frequency from 45Hz to 45kHz. With a message from the LIN master the LED output intensity can be adjusted according to OEM specific requirements.
All the above functions are implemented on one piece of silicon in an very small 5x5mm QFN package.

Melexis Microelectronic Integrated Systems N.V.
www.melexis.com

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