TJA1053

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.

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. 1. It is better equipped for networks with more than 15 nodes 2. A timer has been integrated at the TXD input to prevent a permanent dominant state 3. Reduced supply current in VCC standby mode 4. CANH output driver is disabled in the event that CANH is short-circuited to battery failure mode.