SLOS346O MARCH 2001 – April 2018 SN65HVD230 , SN65HVD231 , SN65HVD232
If a high ambient temperature or excessive output currents result in thermal shutdown, the driver will be disabled and the bus pins become high impedance. During thermal shutdown the D pin to bus transmission path is blocked and the CAN bus pins are high impedance and biased to a recessive level. Once the thermal shutdown condition is cleared and the junction temperature drops below the thermal shutdown temperature the driver will be reactivated and resume normal operation. During a thermal shutdown the receiver to R pin path remains operational.