Infineon launches intelligent tyre pressure monitoring sensor

Infineon’s Xensiv SP49 is designed for intelligent tyre functions such as on-tyre auto-position sensing, inflation assistance, tyre blowout and load detection.

Infineon Technologies has combined its proven automotive expertise with its patented glass-silicon-glass MEMS sensor for the automotive tyre pressure monitoring system market to launch the Xensiv SP49 tyre pressure monitoring sensor.

The sensor integrates MEMS sensors and ASIC and provides smart tyre features that enable advanced tyre pressure monitoring systems. It features a powerful 32-bit Arm M0+ core, a large flash memory and RAM, Low Power Monitoring (LPM), and optimised fast acceleration sensing. The SP49 is ideally suited for intelligent tyre functions such as on-tyre auto-position sensing, tyre inflation assistance, tyre blowout detection, and load detection.

According to Infineon, the SP49 is a pin-to-pin replacement for Infineon’s last-generation SP40 TPMS products. With its hardware master/slave IC interface and software-simulated UART, SPI and PWM interfaces, the SP49 is ideal for sub-1GHz and scalable for BLE TPMS. The sensor offers a high level of integration and is optimised to perform all functions required to implement a modern TPMS module. With its integrated microcontroller, sensors and convenient peripherals, the SP49 requires only a few passive components to form a complete TPMS sensor unit. The device is designed for low power consumption, making it ideal for battery-powered applications.

In addition to the ability to generate a wake-up from the integrated interval timer, the SP49 products are suitable for stand-alone remote pressure sensing solutions that require low power consumption. In these applications, the LF receiver with wake-up capability and best-in-class sensitivity enables on-demand measurements.