The TJA1024 is a quad LIN transceiver that provides the interface between a Local
Interconnect Network (LIN) master/slave protocol controller and the physical bus in a LIN
network. It comprises two independent and separated dual LIN transceiver blocks on a
single die (only the ground pins GND1 and GND2 are connected internally) with dedicated
supply pins (VBAT1 for LIN 1/LIN2 and VBAT2 for LIN3/LIN4).
The TJA1024 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
TJA1024 is software compatible with the TJA1022, TJA1027 and TJA1029.
The transmit data streams generated by the protocol controller are converted by the
TJA1024 into optimized bus signals shaped to minimize ElectroMagnetic Emissions
(EME). The LIN bus output pins are pulled HIGH via internal termination resistors. For a
master application, an external resistor in series with a diode should be connected
between pin VBATx and the respective LIN pins. The receivers detect receive data streams
on the LIN bus input pins and transfer them via pins RXDx to the microcontroller.
Power consumption is very low when all four transceivers are in Sleep mode. However,
the TJA1024 can still be woken up via pins LINx and SLPx_N.