1. General description

The TJA1024 is a quad LIN transceiver that provides the interface between a Local

Interconnect Network (LIN) master/slave protocol controller and the physical bus in a LIN

network. It comprises two independent and separated dual LIN transceiver blocks on a

single die (only the ground pins GND1 and GND2 are connected internally) with dedicated

supply pins (VBAT1 for LIN 1/LIN2 and VBAT2 for LIN3/LIN4).

The TJA1024 is primarily intended for in-vehicle subnetworks using baud rates up to

20 kBd and is compliant with LIN 2.0, LIN 2.1, LIN 2.2, LIN 2.2A and SAE J2602. The

TJA1024 is software compatible with the TJA1022, TJA1027 and TJA1029.

The transmit data streams generated by the protocol controller are converted by the

TJA1024 into optimized bus signals shaped to minimize ElectroMagnetic Emissions

(EME). The LIN bus output pins are pulled HIGH via internal termination resistors. For a

master application, an external resistor in series with a diode should be connected

between pin VBATx and the respective LIN pins. The receivers detect receive data streams

on the LIN bus input pins and transfer them via pins RXDx to the microcontroller.

Power consumption is very low when all four transceivers are in Sleep mode. However,

the TJA1024 can still be woken up via pins LINx and SLPx_N.

2. Features and benefits

2.1 General

 Four LIN transceivers in a single package

 LIN 2.0, LIN 2.1, LIN 2.2, LIN 2.2A and SAE J2602 compliant

 Baud rate up to 20 kBd

 Very low EME

 Very low current consumption in Sleep mode with remote LIN wake-up

 Input levels compatible with 3.3 V and 5 V devices

 Integrated termination resistors for LIN slave applications

 Passive behavior in unpowered state

 Operational during cranking pulse: full operation from 5 V upwards

 Undervoltage detection

 K-line compatible

 Leadless DHVQFN24 package (3.5 mm  5.5 mm) with improved Automated Optical

Inspection (AOI)

 Dark green product (halogen free and Restriction of Hazardous Substances (RoHS)

compliant)

 Software-compatible with the TJA1022, TJA1027 and TJA1029

2.2 Protection

 Very high ElectroMagnetic Immunity (EMI)

 Very high ESD robustness: 8 kV according to IEC 61000-4-2 for pins LINx and VBATx

 Bus terminal and battery pins protected against transients in the automotive

environment (ISO 7637)

 Bus terminal short-circuit proof to battery and ground

 Thermally protected

 Initial TXD dominant check when switching to Normal mode

 TXD dominant time-out function