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CAN transceiver features advanced power management

Posted: 25 Apr 2008 ?? ?Print Version ?Bookmark and Share

Keywords:power management? CAN standard? transceiver?

Maxim Integrated Products has introduced the MAX13041 80V fault-protected, high-speed, automotive CAN transceiver. This device provides an advanced interface between the protocol controller and the physical bus in a CAN node. Advanced power-management features enable this transceiver to minimize power consumption in ECU modules that are permanently supplied by a battery. Additionally, the MAX13041 provides an extended, 80V fault-protected voltage range and 12kV (Human Body Model) ESD protection on the CAN bus lines, making it suitable for robust +12V/+42V automotive and truck applications. Primarily intended for high-speed (up to 1Mbps), automotive CAN applications, it is also well suited for industrial applications.

To minimize current consumption, the MAX13041 features enhanced power management for clamp-30, always-on nodes. Five modes of operation provide different levels of functionality to optimize power consumption. In sleep mode, the ECU is completely powered down, thereby reducing current consumption to 18?A (typ). Upon local or CAN bus activity, the MAX13041 enables the on-board voltage regulator, restoring power to the entire clamp-30 node. Wake-up source recognition can be interrogated by the on-board MCU.

Designed for harsh operating conditions, this device features enhanced diagnostics and overtemperature protection. Capable of detecting local and remote bus failures, the MAX13041 features fail-safe modes to prevent damage to the device or interference with CAN-bus communication. Seven internal flags are used to indicate various fault conditions; five of these flags are available to the system CAN controller. The diagnostic features of the MAX13041, combined with its passive behavior in the absence of power, enable the construction of safe and reliable CAN nodes.

The MAX13041 conforms to the ISO 11898-2 specification, and it promises excellent EMC performance and ultralow power consumption. Available in a Pb-free, RoHS-compliant, 14-pin SO package, this device is fully specified over the -40C to 125C automotive temperature range. Prices start at 89 cents (1,000-up, FOB USA).

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