UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
The ISO14xx devices have a thermal shutdown circuit to protect against damage when a fault condition occurs. A driver output short circuit or bus contention condition can cause the driver current to increase significantly which increases the power dissipation inside the device. An increase in the die temperature is monitored and the device is disabled when the die temperature becomes 170℃ (typical) which lets the device decrease the temperature. The device is enabled when the junction temperature becomes 165℃ (typical).
Bus short circuit for an extended duration and/or beyond voltage levels specified in recommended operating condition should be avoided. Repeated or prolonged exposure to bus shorts can result in high junction temperatures and affect device reliability.