NXP Semiconductors NTM88 Highly Integrated Tire Pressure Sensors
NXP Semiconductors NTM88 Highly Integrated Tire Pressure Monitor Sensors (TPMS) are small (4mm x 4mm x 1.98mm), fully integrated sensors that provide low transmitting power consumption, large memory sizes, and single- or dual-axis accelerometer architectures. The NTM88 TPMS solution integrates an 8-bit microcontroller (MCU), pressure sensor, accelerometers in four ranges, a programmable RF transmitter, and a flexible LF receiver. These NXP Semiconductors NTM88 sensors support seven GPIOs, a client SPI, and a 2-channel timer/pulse-width module (PWM).
Features
- Pressure ranges
- 90kPa to 930kPa for NTM88H
- 90kPa to 1110kPa for NTM88J
- 90kPa to 1518kPa for NTM88K
- Multiple accelerometer ranges
- Transducer measurement interfaces with low-power AFE
- 10-bit compensated pressure sense element
- 10-bit compensated accelerometers
- 8-bit compensated internal device temperature measurement
- 8-bit compensated internal device voltage measurement
- Two I/O pins can be used for external signals
- 8-bit S08 compact instruction set controller
- 64-byte low-power “always on“ NVM parameter registers
- 512-byte SRAM
- 16kB flash memory (512-bytes reserved for NXP coefficients)
- Family of NXP firmware libraries available via royalty-free license
- Programmable RF transmitter
- Characterized for RF carrier typical of 315MHz or 434MHz
- Characterized for FSK in ~3kHz increments or OOK modulation
- Characterized for baud rate examples of 9.6kbp/s, 19.2kbp/s, and 38.4kbp/s
- Flexible 125kHz LF receiver
- Capability for ASK or OOK demodulation
- Automated Manchester decoding
- Two-channel timer/pulse-width module
- Client SPI to support host access to internal peripherals, registers, and memory
- Seven GPIOs with programmable multiplexing to support software development, external analog voltage input, timer, SPI, and wake-up
- Qualified in compliance with AEC-Q100, Rev. H
- Long battery service life
- Internal temperature sensor
- Internal voltage sensor
- Six-channel, 8-, 10-, or 12-bit analog-to-digital converter (ADC)with two external I/O inputs
- Internal 315MHz/434MHz RF transmitter
- External crystal oscillator
- PLL-based output with fractional-n divider
- OOK and FSK modulation capability
- Programmable data rate generator
- Manchester, Bi-Phase, or NRZ data encoding
- 256-bit RF data buffer variable length interrupt
- Direct access to RF transmitter from MCU for unique formats
- Low-power consumption
- Differential input LF detector/decoder on independent signal pins
- Real-time interrupt driven by LFO with intervals of 2ms, 4ms, 8ms, 16ms, 32ms, 64ms, or 128ms
- Free-running counter, low-power, wake-up timer, and periodic reset driven by LFO
- Watchdog timeout with selectable times and clock sources
- Two-channel general-purpose timer/PWM module (TPM1)
- Internal oscillators
- MCU bus clock of 0.5MHz, 1MHz, 2MHz, and 4MHz (1MHz, 2MHz, 4MHz, and 8MHz HFO)
- Low frequency, low-power time clock (LFO) with 1ms period
- Medium frequency, controller clock (MFO) of 8μs period
- Low-voltage detection
- QFN 4mm x 4mm x 1.98mm package
Applications
- Tire Pressure Monitoring Sensor (TPMS) for heavy trucks
- Semi-trucks and tow trucks
- Cement mixers
- Fuel trucks and more
- Ultra-low-power wireless sensing
Specifications
- 1.8V to 3.6V voltage measurement range
- 10mV/LSB voltage resolution (8-bit)
- ±100mV voltage accuracy (>2.1V supply)
- -40°C to +125°C temperature measurement range run mode
- 1°C/LSB temperature resolution (8-bit unsigned)
- ±3°C temperature offset accuracy (-20°C ≤ TA ≤ +85°C)
Datasheets
- NTM88Hxx5S Tire Pressure Monitor Sensors
- NTM88Jxx5S Tire Pressure Monitor Sensors
- NTM88Kxx5S Tire Pressure Monitor Sensors
Block Diagram
Resources
Published: 2024-12-16
| Updated: 2025-03-02