TH8080 Datasheet, PDF (12/23 Pages) Melexis Microelectronic Systems – SoloLIN Transceiver

TH8080
SoloLIN Transceiver
4. Operating under Disturbance
4.1 Loss of battery
If the ECU is disconnected from the battery, the bus pin is in high impedance state. There is no impact to the
bus traffic and to the ECU itself.
4.2 Loss of Ground
In case of an interrupted ECU ground connection there is no influence to the bus line.
4.3 Short circuit to battery
The transmitter output current is limited to the specified value in case of short circuit to battery in order to
protect the TH8080 itself against high current densities .
4.4 Short circuit to ground
If the bus line is shorted to negative shifted ground levels, there is no current flow from the ECU ground to
the bus and no distortion of the bus traffic occurs.
4.5 Thermal overload
The TH8080 is protected against thermal overloads. If the chip temperature exceeds the specified value, the
transmitter is switched off until thermal recovery. The receiver is still working while thermal shutdown.
4.6 Undervoltage Vcc
If the ECU regulated supply voltage is missing or decreases under the specified value, the transmitter is
switched off to prevent undefined bus traffic.
TH8080 – Datasheet
3901008080
Page 12 of 23
July 2004
Rev 006