SLLS983J June 2009 – September 2019 ISO1050
If the junction temperature of the device exceeds the thermal shut down threshold the device turns off the CAN driver circuits thus blocking the TXD to bus transmission path. The shutdown condition is cleared when the junction temperature drops below the thermal shutdown temperature of the device. If the fault condition is still present, the temperature may rise again and the device would enter thermal shut down again. Prolonged operation with thermal shutdown conditions may affect device reliability.
During thermal shutdown the CAN bus drivers turn off; thus no transmission is possible from TXD to the bus. The CAN bus pins are biased to recessive level during a thermal shutdown, and the receiver to RXD path remains operational.