TJA1053

General description

The TJA1053 is the interface between the CAN protocol controller and the physical bus. It is primarily intended for low-speed applications, up to 125 kbaud, in passenger cars. The device provides differential transmit capability but will switch in error conditions to a single-wire transmitter and/or receiver. The TJA1053 is derived from the PCA82C252 giving the following advantages:

• Better equipped for networks with more than 15 nodes
• Integrated timer at the TXD input prevents a permanent dominant state
• Reduced supply current in V_CC standby mode
• CANH output driver is disabled in the event of a ?CANH short-circuited to battery? failure mode.

Features

Optimized for in-car low-speed communication

• Baud rate up to 125 kbaud
• Up to 32 nodes can be connected
• Supports unshielded bus wires
• Low RFI due to built-in slope control function
• Fully integrated receiver filters
• Permanent dominant monitoring of TXD.

Bus failure management

• Supports one-wire transmission modes with ground offset voltages up to 1.5 V
• Automatic switching to single-wire mode in the event of bus failure
• Automatic reset to differential mode if bus failure is removed.

Protection

• Short-circuit proof to battery and ground in 12 V powered systems
• Thermally protected
• Bus lines protected against transients in an automotive environment
• An unpowered node does not disturb the bus lines.

Support for low-power modes

• Low current sleep/standby mode with wake-up via the bus lines
• Power-on reset flag on the output.

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Disclaimers

• General product disclaimer
• Quality and reliability disclaimer