TJA1021

TJA1021 ISO 17987/LIN 2.x/SAE J2602 transceiver Rev. 9 — 10 February 2023 Product data sheet 1 General description The TJA1021 is the interface between the Local Interconnect Network (LIN) commander/ responder protocol controller and the physical bus in a LIN. It is primarily intended for invehicle sub-networks using baud rates from 1 kBd up to 20 kBd (/20 and B variants) and is compliant 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 compatible 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 ElectroMagnetic Emission (EME). The LIN bus output pin is pulled HIGH via an internal termination resistor. For a commander 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 consumption of the TJA1021 is very low. In failure modes, the power consumption is reduced to a minimum. 2 Features and benefits 2.1 General LIN 2.x/ISO 17987-4:2016 (12 V)/SAE J2602 compliant Baud rate up to 20 kBd (/20 and B variants) Very low ElectroMagnetic Emission (EME) High ElectroMagnetic Immunity (EMI) Passive behavior in unpowered state Input levels compatible wit...