TJA1021T/10/C,112

LIN Transceiver 1TX 1RX 20KBd 8Pin SO Tube

Overview

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 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.

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## Features

**2.1 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

* K-line compatible

* Pin-to-pin compatible with TJA1020

* Available in SO8 and HVSON8 packages

* Leadless HVSON8 package 3.0 mm × 3.0 mm with improved Automated Optical Inspection AOI capability

**2.2 Low power management**

* Very low current consumption in Sleep mode with local and remote wake-up

**2.3 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

## Features