ZHCSH94F October 2017 – May 2022 TLIN1029-Q1
GND is the device ground connection. The device can operate with a ground shift as long as the ground shift does not reduce the VSUP below the minimum operating voltage, as well as ensuring the input and output voltages are within their appropriate thresholds. If there is a loss of ground at the ECU level, the device has extremely low leakage from the LIN pin, which does not load the bus down. This is optimal for LIN systems in which some of the nodes are unpowered (ignition supplied) while the rest of the network remains powered (battery supplied).