AMIS41682CANM1RG Integrated Circuits (ICs)

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1. Description

The new AMIS41682CANM1RG are interfaces between the protocol controller and the physical wires of the bus lines in a control area network (CAN). AMIS41682CANM1RG but has a true 3.3 V digital interface to the CAN controller. The device provides differential transmit capability but will switch in error conditions to a single−wire transmitter and/or receiver. Initially it will be used for low speed applications, up to 125 kB, in passenger cars.

Both AMIS41682CANM1RG are implemented in I2T100 technology enabling both high−voltage analog circuitry and digital functionality to co−exist on the same chip.

2. Pin configuration

3. Features

    1. Fully Compatible with ISO11898−3 Standard

    2. Optimized for In−Car Low−speed Communication

         - Baud Rate up to 125 kB

         - Up to 32 Nodes can be Connected

         - Due to Built−in Slope Control function and a very Good Matching of the CANL and CANH bus outputs, this device realizes a very low electromagnetic emission (EME)

         - Fully Integrated Receiver Filters

         - Permanent Dominant Monitoring of Transmit Data Input

         - Differential Receiver with Wide Common−Mode Range for High Electromagnetic Susceptibility (EMS) in Normal− and Low−Power Modes

         - True 3.3 V Digital I/O Interface to CAN Controller for AMIS−41683 Only

    3. Management in Case of Bus Failure

         - In the Event of Bus Failures, Automatic Switching to Single−Wire Mode, even when the CANH Bus Wire is Short−Circuited to VCC

         - The Device will Automatically Reset to Differential Mode if the Bus Failure is Removed

         - During Failure Modes There is Full Wake−up Capability

         - Unpowered Nodes do not Disturb Bus Lines

         - Bus Errors and Thermal Shutdown Activation is Flagged on ERR Pin

    4. Protection Issues

         - Short Circuit Proof to Battery and Ground

         - Thermal Protection

         - The Bus Lines are Protected Against Transients in an Automotive Environment

         - An Unpowered Node Does not Disturb the Bus Lines

    5. Support for Low Power Modes

         - Low Current Sleep and Standby Mode with Wake−up via the Bus Lines

         - Power−on Flag on the Output

         - Two−Edge Sensitive Wake−up Input Signal via Pin WAKE

    6. I/Os

         - The unpowered chip cannot be parasitically supplied either from digital inputs or from digital outputs

    7. These are Pb−Free Devices*

4. TYPICAL APPLICATION SCHEMATIC