1.

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.

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 master application, an external resistor in series with a

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

2.2 Low power management

2.3 Protection mechanisms

6 kV according to IEC 61000-4-2 for pins LIN, V

WAKE_N

TJA1021

LIN 2.1/SAE J2602 transceiver

Rev. 6 — 30 December 2010

Product data sheet