TJA1021
description
The TJA1021 is the interface between the Local Interconnect Network (LIN) mander/ responder protocol controller and the physical bus in a LIN. It is primarily intended for invehicle sub-networks using baud rates from 1 k Bd up to 20 k Bd (/20 and B variants) and is pliant with LIN 2.0, LIN 2.1, LIN 2.2, LIN 2.2A, SAE J2602 and ISO 17987-4:2016 (12 V). The TJA1021 is pin-to-pin patible with the TJA1020 and MC33662(B).
The transmit data stream of the protocol controller at the transmit data input (TXD) is converted by the TJA1021 into a bus signal with optimized slew rate and wave shaping to minimize Electro Magnetic Emission (EME). The LIN bus output pin is pulled HIGH via an internal termination resistor. For a mander application, an external resistor in series with a diode should be connected between pin INH or pin VBAT and pin LIN. The receiver detects the data stream at the LIN bus input pin and transfers it via pin RXD to the microcontroller.
In Sleep mode, the power...
