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