JAJSF71B April 2018 – December 2019 TLIN1024-Q1
VSUP1/2 are the power supply pins. VSUP1/2 is connected to the battery through and external reverse battery blocking diode (See Figure 26). If there is a loss of power 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).