Infineon TLE7250VSJXUMA1 LIN Transceiver: A Comprehensive Datasheet Overview and Application Guide
The Infineon TLE7250VSJXUMA1 is a highly integrated Local Interconnect Network (LIN) transceiver, designed to serve as the critical interface between a LIN protocol controller and the physical bus in automotive networks. Fully compliant with the LIN 2.2/2.1/2.0 and SAE J2602 specifications, this device is engineered to meet the stringent requirements of modern vehicle applications, offering robust performance and enhanced diagnostic capabilities.
Core Features and Electrical Characteristics
At its heart, the TLE7250VSJXUMA1 is built for low electromagnetic emission (EME) and high electromagnetic immunity (EMI), which is paramount in the electrically noisy environment of an automobile. It operates from a supply voltage range of 5.5 V to 27 V, making it resilient against automotive load-dump conditions. A key feature is its very low current consumption in sleep mode (typically 6 µA), which is essential for supporting the low-power operation mandates in modern vehicles to minimize quiescent current and extend battery life.
The transceiver integrates a 3.3 V/5 V compatible digital input (TXD), allowing for direct interfacing with a wide range of microcontrollers without the need for additional level-shifting components. The LIN bus pin is protected against overvoltage and reverse battery conditions (up to -40 V), safeguarding the ECU from potential wiring faults. Furthermore, it includes comprehensive diagnostic functions such as thermal shutdown, undervoltage detection, and failure feedback on the RXD pin, enabling the host microcontroller to monitor the health of the network connection effectively.
Application Notes and System Integration
In a typical application circuit, the TLE7250VSJXUMA1 is placed between the host microcontroller (the LIN master or slave node) and the LIN bus line. A crucial external component is the series resistor (Rs) at the LIN pin, which, in combination with the internal termination, helps to shape the waveform and limit electromagnetic emissions. A pull-up resistor and a diode are also required on the WAKE pin if the local or remote wake-up functionality is to be implemented.
This transceiver is ideal for a vast array of body control and convenience applications, including:
Sensor and actuator control (e.g., window lifters, seat controllers, rain/light sensors)
Door modules and smart junction boxes
Steering wheel control units
Roof and climate control modules
Its small PG-SSO-14 package ensures a minimal footprint on the PCB, which is critical for space-constrained electronic control units (ECUs). For optimal EMC performance, it is highly recommended to follow the layout guidelines provided in the datasheet, which include using a ground plane, short trace lengths to the LIN bus connector, and proper decoupling capacitors close to the VSUP and VCC pins.
ICGOODFIND: The Infineon TLE7250VSJXUMA1 stands out as a robust, reliable, and highly efficient solution for LIN network implementation. Its combination of low power consumption, extensive diagnostic features, and superior robustness against electrical hazards makes it an excellent choice for designers building next-generation automotive electronic systems that demand longevity and reliability.
Keywords: LIN Transceiver, Automotive Networking, Low Power Consumption, EMC Performance, Diagnostic Functions.
