The TJA1022 is a dual LIN transceiver that provides the interface between a Local
Interconnect Network (LIN) protocol controller and the physical bus in a LIN
network. It is primarily intended for in-vehicle subnetworks using baud rates up to 20 kBd
and is compliant with LIN 2.0, LIN 2.1, LIN 2.2, LIN 2.2A and SAE J2602. The TJA1022 is
pin compatible with the TJA1020, TJA1021 and TJA1027. The TJA1022
and TJA1027 are also software compatible.
The transmit data streams generated by the protocol controller are converted by the
TJA1022 into optimized bus signals shaped to minimize ElectroMagnetic Emissions
(EME). The LIN bus output pins are pulled HIGH via internal termination resistors. For a
leader application, an external resistor in series with a diode should be connected
between pin VBAT and each of the LIN pins. The receivers detect receive data streams on
the LIN bus input pins and transfer them via pins RXD1 and RXD2 to the microcontroller.
Power consumption is very low when both transceivers are in Sleep mode. However, the
TJA1022 can still be woken up via pins LIN1/LIN2 and SLP1_N/SLP2_N.