AMIS-4168X Datasheet, PDF (1/20 Pages) AMI SEMICONDUCTOR – Fault Tolerant CAN Transceiver

1.0 General Description
AMIS-4168x
Fault Tolerant CAN Transceiver
The new AMIS-41682 and AMIS-41683 are interfaces between the protocol controller and the physical wires of the bus lines in a
control area network (CAN). AMIS-41683 is identical to the AMIS-41682 but has a true 3.3V 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 125kBaud, in passenger cars.
Both AMIS-41682 and AMIS-41683 are implemented in I2T100 technology enabling both high-voltage analog circuitry and digital
functionality to co-exist on the same chip.
These products consolidate the expertise of AMIS for in-car multiplex transceivers and support together with AMIS-30522 (VAN),
AMIS-30660 and AMIS-30663 (CAN high speed) and AMIS-30600 (LIN) another widely used physical layer.
2.0 Key Features
• Fully compatible with ISO11898-3 standard
• Optimized for in-car low-speed communication
o Baud rate up to 125kBaud
o Up to 32 nodes can be connected
o 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)
o Fully integrated receiver filters
o Permanent dominant monitoring of transmit data input
o Differential receiver with wide common-mode range for high electromagnetic susceptibility (EMS) in normal- and low-
power modes
o True 3.3V digital I/O interface to CAN controller for AMIS-41683 only
• Management in case of bus failure
o In the event of bus failures, automatic switching to single-wire mode, even when the CANH bus wire is short circuited
to VCC
o The device will automatically reset to differential mode if the bus failure is removed
o During failure modes there is full wake-up capability
o Un-powered nodes do not disturb bus lines
o Bus errors and thermal shutdown activation is flagged on ERRB pin
• Protection issues
o Short circuit proof to battery and ground
o Thermal protection
o The bus lines are protected against transients in an automotive environment
o An un-powered node does not disturb the bus lines
• Support for low power modes
o Low current sleep and standby mode with wake-up via the bus lines
o Power-on flag on the output
o Two-edge sensitive wake-up input signal via pin WAKEB
• I/Os
The un-powered chip cannot be parasitically supplied either from digital inputs or from digital outputs
©2008 SCILLC. All rights reserved.
June 2008 – Rev. 4
Publication Order Number:
4168x/D