General description
The TJA1021 is the interface between the Local Interconnect Network (LIN) master/slave protocol controller and the physical bus in a LIN. It is primarily intended for in-vehicle sub-networks using baud rates from 1 kBd up to 20 kBd and is LIN 2.1/SAE J2602 compliant. The TJA1021 is pin-to-pin compatible with the TJA1020 with an improved ElectroStatic Discharge (ESD) specification.

FEATUREs and benefits
General
LIN 2.1/SAE J2602 compliant
Baud rate up to 20 kBd
Very low ElectroMagnetic Emission (EME)
High ElectroMagnetic Immunity (EMI)
Passive behavior in unpowered state
Input levels compatible with 3.3 V and 5 V devices
Integrated termination resistor for LIN slave applications
Wake-up source recognition (local or remote)
Supports K-line like functions
Pin-to-pin compatible with TJA1020

Low power management
Very low current consumption in Sleep mode with local and remote wake-up

Protection mechanisms
High ESD robustness: 6 kV according to IEC 61000-4-2 for pins LIN, VBAT and WAKE_N
Transmit data (TXD) dominant time-out function
Bus terminal and battery pin protected against transients in the automotive environment (ISO 7637)
Bus terminal short-circuit proof to battery and ground
Thermally protected