Compact Tire-Pressure Monitoring

June 30, 2015

Jenny Hessler

Freescale Semiconductor’s FXTH87 tire-pressure monitoring system family provides low-power consumption, extended battery life, and functional integration in a compact, 0.3-g (0.01-oz), 7 x 7 x 2.2-mm (0.28 x 0.28 x 0.09-in) package with a dual-axis accelerometer architecture, pressure and temperature sensor, integrated multipoint control unit (MCU), radio frequency transmitter, and low-frequency receiver. Systems ensure proper tire inflation monitoring to improve safety and fuel economy and to reduce emissions. Single- and dual-axis accelerometer options improve accuracy and facilitate precise tire localization implementation and interoperability, and the integrated MCU and firmware offer 8 KB flash memory, increasing flexibility. Pressure ranges are 100 to 450 and 100 to 900 kPa (14.5 to 65 and 14.5 to 130 psi).