Sensing SolutionsRobust, Reliable Performance
FXTH8715 High Pressure
TPMS Family
Tire Pressure Monitoring Sensors 100-1500 kPa
Target Applications
Overview
Tire pressure monitoring
systems
Freescales FXTH8715 high pressure family of tire pressure monitoring sensors (TPMS) is highly
integrated with the smallest 7 x 7 mm package footprint on the market which has a 63% Ultra low-power wireless
sensing
smaller footprint than Freescales previous-generation of SOIC 20 package developed for truck
applications. It also provides the lowest transmitting power consumption (less than 8 mA Idd),
Implementations
largest customer memory size (8 kB) currently available and unique dual-axis accelerometer
Measures pressure typical for
architecture. Freescales TPMS solution integrates an 8-bit microcontroller (MCU), pressure
heavy duty vehicles (trucks,
sensor, XZ-axis or Z-axis accelerometer and RF transmitter.
buses, construction vehicles)
Measures dual-axis acceleration
Freescales portfolio with pressure ranges of 100-1500 kPa support s medium and heavy duty
trucks, buses and construction vehicles for TPMS markets. These TPMS markets are mainly Measures temperature
driven by improved safety and fleet management requirements.
Measures battery voltage
Bi-directional communication
FXTH8715 TPMS Family Block Diagram
Xtrinsic FXTH87 TPMS Family Block Diagram
Core System Memories Sub-1 GHz Radio Transmitter
64-byte
Battery-backed 16 kB Flash
315 or 434 MHz ISM band RF Tx
S08 8-bit 4 MHz
RAM
Periodic
512-byte RAM
Wake-Up Unit
Debug Interrupt 26 MHz
VCO / PLL
Interfaces Controller Oscillator
Temperature
Restart
Packet Encoder
32-byte Buffer
Analog Timers Interfaces Clocks
Low-, Medium- and
Keyboard Interface
2 ch Timer
6 ch 10-bit ADC
High- Frequency
Oscillators
6 ch GPIOs
Periodic
Sensor Measurement
Interrupt
Interface Internal
Timer
Reference Clocks
125 kHz Differential
Pressure Sensor
LF ASK Rx
Low-Power
Timer
Accelerometer
Temperature SensorProduct Specifications
Standard P-cell Pressure Offset Axis of Z Range Z-Offset Accuracy X-Offset Accuracy
Part Number Range (kPa) Accuracy (0 C to 70 C) Acceleration Sensitivity (-40 C to +125 C X Range (-40 C to +125 C)
Standard Tolerances
-270 g/+350 g range,
FXTH871502DT1 100-1500 20 kPa Z 6 g
40 g sensitivity
-210 g/+240 g range, -70 g/+80 g range,
FXTH871511DT1
100-1500 20 kPa XZ 5 g 4 g
60 g sensitivity 10 g sensitivity
Precision Tolerances
-270 g/+350 g range,
FXTH8715026T1 100-1500 20 kPa Z 3 g
40 g sensitivity
-210 g/+240 g range, -70 g/+80 g range,
FXTH8715116T1 100-1500 20 kPa XZ 3 g 3 g
60 g sensitivity 10 g sensitivity
High Precision Tolerances
-270 g/+350 g range,
FXTH8715027T1 100-1500 17 kPa Z 3 g
40 g sensitivity
-210 g/+240 g range, -70 g/+80 g range,
FXTH8715117T1 100-1500 17 kPa XZ 3 g 3 g
60 g sensitivity 10 g sensitivity
Features
Common Attributes
QFN 7 x 7 x 2.2 mm package enables
Voltage Measurement Range 1.8 V to 3.6 V
visible solder joint for inspection
Voltage Resolution (8-bit) 10 mV / LSB
1001500 kPa pressure range Voltage Accuracy (>2.1 V supply) 100 mV
o o
Temperature Measurement Range Run Mode -40 C to +125 C
Z-axis or dual XZ-axis accelerometers
o
Temperature Resolution (8-bit unsigned) 1 C / LSB
Accelerometer standard or precision
o o o
Temperature Offset Accuracy (-20 C TA 70 C) 3 C
tolerances available
High precision tolerance available for
Product Differentiation
pressure
Features Benefits
Low-power wake-up timer and periodic
Tightest offset pressure accuracy Enables predictive system implementation
reset driven by LFO
Enables smallest module design for lighter weight
Smallest package size
Dedicated state machines for reduced
and space-constrained applications
power consumption
Dual-axis XZ inertial sensor Enables easier tire localization capability
8-bit MCU/S08 core with SIM, interrupt
Flexibility of software development and time to
8 kB customer memory/capability of interfacing with external
memory market
and debug/monitor
Lowest RF power consumption Longest battery life
512 Bytes RAM / 16 k Flash (8 k for
High production capacity (QFN 7 x 7) Secured supply and short lead time
Freescale library, 8 k for applications)
Internal 315/434 MHz RF transmitter
Documentation
Internal 125 kHz LF receiver
Document Number Title Description
Six multipurpose GPIO pins (including
FXTH871xD Tire Pressure Monitor Sensor Standard Tolerance Specification Data Sheet
two A/D inputs)
FXTH871x6 Tire Pressure Monitor Sensor Precision Tolerance Specification Data Sheet
FXTH871x7 Tire Pressure Monitor Sensor for High Precision Data Sheet
Product Longevity Program
AN4391 Using the FXTH87 Family of LF Receivers for TPMS Application Application Note
These products are/or may be supported AN1902 Assembly Guidelines for QFN and DFN Packages Application Note
by Freescales Product Longevity Program.
For Terms and Conditions and to obtain a
Freescale: A Leader in Sensing Solutions
list of available products please see:
Expanding on more than 35 years of sensor innovation, Freescale sensing solutions are
Freescale.com/productlongevity
designed with the right combination of high-performance sensing capability, processing capacity
and customizable software to help deliver smart, differentiated sensing applications. With these
sensing solutions, our vision is to offer a diverse and differentiated product portfolio to meet
the expanding needs of the automotive, consumer and industrial segments. Freescale sensing
solutions offer ideal blends of functionality and intelligence designed to help our customers
differentiate and win in highly competitive market.
For more information, visit freescale.com/TPMS and
freescale.com/pressure
Freescale and the Freescale logo are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. SMARTMOS is a
trademark of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners.
2015 Freescale Semiconductor, Inc
Document Number: 1500FXTH87FS REV 0