Freescale claims smallest integrated tyre pressure monitoring system

October 21, 2014 // By Graham Prophet
This highly integrated tyre pressure monitoring device combines the smallest package and lowest power consumption for precise tyre pressure sensing

The FXTH87 tyre pressure monitoring system (TPMS) family is positioned as the smallest integrated package TPMS solution available at 0.3 grams. The FXTH87 family is 50% smaller than competing products. Freescale's TPMS system-in-package solution provides low power consumption combined with the highest level of functional integration in one package, featuring a dual-axis accelerometer architecture, pressure and temperature sensor, integrated MCU, RF transmitter and low frequency receiver.

According to market analysts IHS iSuppli, TPMS will represent more than 25% of the total pressure measurement market for automotive sensors by 2015. Freescale says, “In TPMS, size and weight are critical, because the system is installed on the car’s tyre. We are offering a one-of-a-kind solution that can help improve the safety and efficiency of virtually every car on the road.”

In a 7 x 7 x 2.2 mm package, the FXTH87 family provides the smallest footprint available, enabling form factors ideal for tyre pressure sensor module developers to reduce the weight and overall bill of materials costs. Lowest RF power consumption at 7 mA Idd extends battery life. Both the single- and dual-axis accelerometer options improve accuracy and facilitate more precise tyre localisation implementation and universal interoperability for original equipment manufacturers and aftermarket applications. The integrated MCU and dedicated firmware offer the largest customer flash memory at 8 kB, increasing application flexibility and reducing time to market. The device costs $3.45 to $3.62 (10,000).