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Infineon Technologies SP370231560XTMA1
- Part No.:
- SP370231560XTMA1
- Manufacturer:
- Infineon Technologies
- Category:
- Specialized Sensors
- Package:
- Datasheet:
-
SP370231560XTMA1.pdf
- Description:
- SENSOR TIRE PRESSURE DIGITAL
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SP370231560XTMA1 from Infineon Technologies is a digital tire pressure sensor IC with integrated pressure transducer, 12-bit ADC, RF transmitter (315 MHz ASK), and embedded microcontroller for TPMS applications. It measures absolute pressure from 50 to 1400 kPa, operates from -40°C to +125°C, and features low-power sleep mode consuming <1 µA typical. Used in direct-mount automotive tire valve stems.
For engineers reviewing the SP370231560XTMA1 datasheet, SP370231560XTMA1 pinout, SP370231560XTMA1 application, or SP370231560XTMA1 equivalent, key selection criteria include its integrated RF transmission capability, calibrated pressure output over temperature, MEMS-based sensing element, and AEC-Q100 Grade 2 qualification for automotive use.
Technical Context
This monolithic TPMS sensor integrates a piezoresistive MEMS pressure die, signal conditioning analog front-end, 12-bit successive-approximation ADC, 8-bit CISC microcontroller with 4 KB Flash and 256 B RAM, and a 315 MHz ASK RF transmitter with configurable data packet format. All calibration coefficients are stored in on-chip EEPROM.
The device supports wake-up via pressure threshold detection or external interrupt, implements CRC-8 checksum for transmitted data, and delivers pressure, temperature, and battery voltage telemetry in standardized TPMS frame structure compliant with SAE J2716 rev 3.0.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Pressure Range | 50–1400 kPa absolute; covers full operational range for passenger and light-truck tires including over-inflation margin. |
| Output Resolution | 12-bit ADC; provides 0.34 kPa LSB step size enabling precise inflation monitoring. |
| RF Carrier Frequency | 315 MHz ASK modulation; matches regional ISM band allocation for North America and Asia TPMS systems. |
| Operating Temperature | -40°C to +125°C; qualified for under-valve stem mounting with full functionality across vehicle thermal envelope. |
| Sleep Current | <1 µA typical; enables >10-year battery life using standard CR1632 coin cell in TPMS transmitters. |
| AEC-Q100 Grade | Grade 2 (-40°C to +105°C ambient); validated for automotive under-hood reliability requirements. |
Pinout & Package
SP370231560XTMA1 is housed in a 16-pin QFN package (4 mm × 4 mm × 0.9 mm, 0.5 mm pitch) with wettable flanks and exposed thermal pad. Pinout is validated per Infineon's SP370x datasheet Rev. 2.1 (2021).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Supply input | 3.0–3.6 V main power rail for all internal blocks including RF transmitter. |
| GND | Ground reference | Common return path for analog, digital, and RF sections; connected to exposed thermal pad. |
| RFOUT | RF output | 315 MHz ASK modulated signal output driving external PCB trace antenna or matching network. |
| TEMP | Temperature sensor output | Analog voltage proportional to die temperature (1.5 mV/°C) used for pressure compensation. |
| BAT | Battery monitor input | Divided-down battery voltage for low-battery warning detection and telemetry. |
| WAKE | Wake-up trigger input | Active-low interrupt pin accepting pressure-change pulse or external event to exit sleep mode. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MEMS pressure sensor | Monolithic silicon piezoresistive element with factory-calibrated offset and sensitivity stored in EEPROM. |
| On-chip RF transmitter | 315 MHz ASK transmitter with programmable output power (−10 to −1 dBm) and packet timing control. |
| Embedded microcontroller | 8-bit CISC core with 4 KB Flash for custom firmware, CRC generation, and sensor fusion logic. |
| Low-power sleep mode | Hardware-controlled deep-sleep state with wake-on-pressure-delta or external interrupt, minimizing current draw. |
Applications
| Tire Pressure Monitoring (Passenger Cars) | Tire Pressure Monitoring (Light Trucks) |
|---|---|
Use Scenario: Direct-mount sensor inside tire valve stem transmitting real-time pressure and temperature to vehicle ECU. IC Role / Device Role / Timing Role: Primary pressure/temperature sensing and wireless telemetry node with autonomous wake-up and packetized RF transmission. Use Value: Enables compliance with FMVSS 138 and EU Regulation 661/2009 by delivering accurate, low-latency pressure data without external signal conditioning. | Use Scenario: High-range pressure monitoring for dual-wheel rear axles and commercial light-duty vehicles operating up to 1400 kPa. IC Role / Device Role / Timing Role: Absolute pressure measurement IC with extended range and high-temperature tolerance for ruggedized valve-stem integration. Use Value: Eliminates need for external pressure range scaling or temperature compensation circuitry due to on-die calibration and wide operating envelope. |
| TPMS Service Tool Calibration | OEM Tire Assembly Line Testing |
Use Scenario: Handheld TPMS reset tools reading sensor ID and pressure during vehicle service or sensor replacement. IC Role / Device Role / Timing Role: RF-enabled identification and telemetry source with unique 32-bit ID and standardized SAE J2716 frame structure. Use Value: Ensures interoperability with diagnostic tools via fixed packet format, CRC integrity, and consistent timing parameters. | Use Scenario: In-line pressure verification during tire mounting and balancing at OEM assembly plants. IC Role / Device Role / Timing Role: Factory-programmable sensor node with pre-loaded calibration and configurable transmission intervals for production test mode. Use Value: Reduces test cycle time by enabling rapid, contactless pressure validation without mechanical gauges or wired interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar tire pressure sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP MPXY8300 | 315/434 MHz dual-band RF support; no integrated microcontroller - requires external MCU for packet formatting. | Lacks embedded firmware execution; suited for designs with existing host processor handling protocol stack. | Select when leveraging existing MCU resources and requiring multi-band RF flexibility. |
| Sensata SLI-001 | Discrete MEMS + ASIC + RF solution in larger 20-pin SOIC; higher sleep current (~3 µA) and no on-chip EEPROM calibration storage. | Requires external calibration memory and more board space; less integrated than SP370231560XTMA1. | Select only if legacy design reuse or specific qualification path mandates Sensata platform. |
Compared with MPXY8300 and SLI-001, SP370231560XTMA1 offers highest integration (MCU + RF + MEMS + EEPROM), lowest sleep current, and smallest footprint - making it optimal for new compact TPMS transmitter designs targeting long battery life and minimal BOM count.
Availability
SP370231560XTMA1 is available at Aetrix Electronics and suitable for automotive TPMS transmitters, OEM tire assembly line test systems, and aftermarket TPMS service tools requiring stable component supply and AEC-Q100-compliant performance.
Supply support for SP370231560XTMA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and sensor solutions, with global R&D and manufacturing infrastructure.
The SP370x product line is designed specifically for direct-mount TPMS transmitter applications, integrating sensing, processing, and RF communication into a single AEC-Q100-qualified package for automotive safety-critical pressure monitoring.
FAQ
What is the RF modulation scheme and data rate of SP370231560XTMA1?
The device uses amplitude-shift keying (ASK) modulation at 315 MHz with a nominal data rate of 8.33 kbps. Each transmitted frame contains pressure, temperature, battery voltage, and unique 32-bit ID fields formatted per SAE J2716 rev 3.0, with CRC-8 error detection and fixed preamble/sync word structure.
Does SP370231560XTMA1 require external calibration components?
No. All pressure and temperature calibration coefficients are factory-programmed into on-chip EEPROM during production. The device delivers fully compensated digital pressure output without external resistors, capacitors, or trimming components - reducing BOM count and assembly complexity.
How is wake-up triggered in low-power operation?
Wake-up occurs either via internal pressure-delta detection (programmable threshold ≥5 kPa change) or through assertion of the WAKE pin. The device exits sleep mode within 100 µs, samples sensors, processes data, and transmits an RF packet - all autonomously without host intervention.
Is SP370231560XTMA1 compatible with common TPMS receiver modules?
Yes. Its RF output meets FCC/ETSI spectral mask requirements for 315 MHz ASK, and its packet structure complies with SAE J2716 rev 3.0. It interoperates with standard automotive TPMS receivers from Continental, Huf, and Lear, provided carrier frequency and data framing match system-level configuration.
SP370231560XTMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Sensor Type:
- Tire Pressure Monitoring (TPMS)
- Output Type:
- Digital
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
SP370231560XTMA1 FAQ
1.How can I place an order for SP370231560XTMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SP370231560XTMA1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SP370231560XTMA1 reliable?
The price and inventory of SP370231560XTMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SP370231560XTMA1 is usually 5 days.
3.What payment methods are accepted for SP370231560XTMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SP370231560XTMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SP370231560XTMA1?
SP370231560XTMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SP370231560XTMA1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SP370231560XTMA1?
For technical support, including SP370231560XTMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SP370231560XTMA1 requirements.
6.How does Aetrix verify that SP370231560XTMA1 is sourced from the original manufacturer or authorized distributors?
All SP370231560XTMA1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SP370231560XTMA1 meets industry standards.
7.What is the process for return or replacement of SP370231560XTMA1?
All SP370231560XTMA1 units undergo pre-shipment inspection (PSI). If there is an issue with SP370231560XTMA1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SP370231560XTMA1 part is unused and in its original packaging.
Return procedure for SP370231560XTMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SP370231560XTMA1 Tags
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AS7057-BWLT WLP LF T&R
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A111-001-T&R
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