Infineon TLE8264E: A Comprehensive Overview of the Dual-Channel LIN Transceiver

The Infineon TLE8264E represents a highly integrated, dual-channel LIN (Local Interconnect Network) transceiver designed to meet the rigorous demands of modern automotive body and convenience applications. As a key interface between a LIN master/slave protocol controller and the physical bus, this IC provides a robust and reliable solution for in-vehicle networking.

Core Architecture and Key Features

The TLE8264E integrates two fully independent LIN transceiver channels into a single small PG-DSO-14 package, making it an ideal choice for space-constrained modules requiring multiple LIN nodes. Each channel is compliant with the LIN 2.2/2.1/2.0 and SAE J2602-2 specifications, ensuring broad compatibility with existing and future automotive networks.

A standout feature is its extremely low quiescent current in sleep mode, typically as low as 5.5 µA per channel. This is critical for automotive applications where minimizing battery drain when the vehicle is off is paramount. The device supports multiple operating modes—Normal, Standby, and Sleep—controlled via a dedicated enable pin (EN) and the LIN bus itself, allowing for sophisticated power management strategies.

The transceiver is designed for exceptional robustness against electromagnetic interference (EMI) and features high ESD protection up to ±6 kV according to the Human Body Model (HBM) on the LIN bus pins, safeguarding the system from electrostatic discharge events common in automotive environments. Furthermore, it offers comprehensive protection against over-temperature and short circuits to battery and ground, enhancing system reliability under fault conditions.

Target Applications

The dual-channel nature of the TLE8264E makes it perfectly suited for a wide array of automotive control modules, including:

Body Control Modules (BCMs)

Door Control Units (e.g., for window lifters, mirror adjustment)

Seat Control Units

Steering Column Modules

Sunroof Control Units

Advantages in System Design

By integrating two channels, the TLE8264E significantly reduces the component count on the PCB compared to using two single-channel transceivers. This leads to a smaller system footprint, lower overall cost, and improved reliability. Its advanced diagnostic capabilities, such as thermal shutdown and failure detection on the LIN bus, provide valuable feedback to the microcontroller for implementing fail-safe operational strategies.

ICGOODFIND In summary, the Infineon TLE8264E is a highly efficient and compact dual-channel LIN transceiver that excels in power-saving performance, integration level, and robustness. It is an optimal choice for designers aiming to develop sophisticated, reliable, and cost-effective multi-node LIN network systems in modern vehicles.

Keywords: LIN Transceiver, Automotive Networking, Low Quiescent Current, Dual-Channel, ESD Protection