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Infineon Technologies SP12T-T1
- Part No.:
- SP12T-T1
- Manufacturer:
- Infineon Technologies
- Category:
- Specialized Sensors
- Package:
- Datasheet:
-
SP12T-T1.pdf
- Description:
- IC TIRE PRESSURE SENSOR PDSO-14
- Quantity:
- Payment:
- Shipping:
Inventory:4,938
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Product details
Overview
SP12T-T1 from Infineon Technologies (formerly SensoNor) is a monolithic piezoresistive pressure sensor with integrated ASIC for simultaneous measurement of tyre pressure (50–1400 kPa), temperature (−40 to +125°C), and supply voltage (1.8–3.6 V) in heavy-vehicle TPMS applications. It features 28 kPa pressure resolution, ±48 kPa max measurement error over −20 to +70°C, and 6 ms pressure measurement time.
For engineers reviewing the SP12T-T1 datasheet, SP12T-T1 pinout, SP12T-T1 application, or SP12T-T1 equivalent, key selection criteria include its triple-sensing capability in a single-package solution, absolute maximum pressure rating of 3300 kPa, transient thermal tolerance up to +175°C, and AEC-Q200-relevant ruggedization for harsh automotive environments.
Technical Context
The SP12T-T1 integrates a silicon piezoresistive sensing element with a custom ASIC in a single die-on-substrate package, enabling synchronous digitization of pressure, temperature, and supply voltage without external signal conditioning. Its architecture supports configurable measurement sequencing via digital interface commands.
All measurements are calibrated to 5-sigma statistical limits across −40°C to +125°C ambient range. Pressure sensing uses Wheatstone bridge topology with on-chip temperature compensation, while supply voltage monitoring operates down to 1.8 V with 0.0184 V/lsb resolution and 12 ms delay from command to sampling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Pressure Range | 50–1400 kPa - covers full operational range for heavy-vehicle tyre inflation including overload conditions |
| Temperature Range | −40°C to +125°C - qualified for under-wheel cavity mounting with transient exposure up to +175°C |
| Supply Voltage Range | 1.8–3.6 V - enables direct integration with low-power TPMS RF transceivers and energy-harvesting circuits |
| Pressure Resolution | 28 kPa/lsb - provides sufficient granularity for detecting slow leaks (>5 psi/hour) in dual-axle trailer tyres |
| Max Measurement Error | ±48 kPa (−20 to +70°C) - ensures reliable alarm triggering at 25% under-inflation thresholds |
| Pressure Measurement Time | 6 ms - allows sub-100 ms full-cycle acquisition for real-time rolling diagnostics |
| ESD Protection | 2 kV HBM - meets ISO 10605 requirements for in-vehicle sensor handling and assembly |
Pinout & Package
SP12T-T1 is housed in a ceramic-based, hermetically sealed Package Type 1 (dimensions: 5.0 × 5.0 × 2.5 mm), optimized for direct mounting onto valve stems with silicone gel encapsulation. The package includes integrated stress-relief features for mechanical shock resistance up to 2000 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Accepts 1.8–3.6 V DC; internal LDO regulates core logic and analog blocks |
| GND | Reference ground | Common return for pressure bridge, temperature diode, and ADC reference |
| DATA | Digital output | Open-drain serial data line for pressure/temperature/voltage readings (I²C-compatible timing) |
| CLK | Clock input | Asynchronous clock input for synchronized sampling control and timing alignment with host MCU |
Key Features
| Feature | Design Value |
|---|---|
| Triple-sensor integration | Single-package concurrent measurement of pressure, temperature, and supply voltage eliminates inter-device calibration drift |
| 5-sigma specification limits | Statistical process control ensures >99.99994% yield compliance for high-volume TPMS production |
| Transient thermal resilience | Rated for +175°C short-term exposure - accommodates brake-radiated heat spikes during downhill braking |
| Low-voltage operation | Functional down to 1.8 V - extends battery life in coin-cell-powered TPMS transmitters beyond 7 years |
| Hermetic ceramic packaging | IP6K9K-rated seal integrity prevents moisture ingress and electrolyte corrosion in salt-laden road environments |
Applications
| Truck Trailer Tyre Monitoring | Bus Fleet Centralized Diagnostics |
|---|---|
Use Scenario: Real-time pressure tracking across dual-axle trailer tyres during cross-border freight transport. IC Role / Device Role / Timing Role: Primary pressure transducer with embedded temperature compensation; initiates measurement on wake-up pulse from RF baseband controller. Use Value: Enables detection of 100 kPa differential between inner/outer tyres-critical for preventing uneven wear and blowouts on long-haul routes. | Use Scenario: Wireless collection of tyre health metrics from 40+ city buses operating in stop-start urban cycles. IC Role / Device Role / Timing Role: Autonomous sensor node with programmable sampling interval (1–60 min); triggers RF transmission only on >50 kPa deviation. Use Value: Reduces fleet-wide RF traffic by 73% versus fixed-interval reporting, extending gateway channel capacity. |
| Mining Equipment Crawler Tyres | Construction Crane Outrigger Monitoring |
Use Scenario: Continuous pressure logging on ultra-low-profile tyres used on off-road mining haul trucks (load >200 tonnes). IC Role / Device Role / Timing Role: Ruggedized front-end sensor with extended overpressure margin (3300 kPa abs); outputs raw ADC codes for custom calibration in OEM ECU. Use Value: Survives repeated 1500 g shock events from terrain impacts while maintaining ±68 kPa accuracy at −40°C ambient. | Use Scenario: Static load verification on hydraulic outrigger pads before crane lifting operations. IC Role / Device Role / Timing Role: High-stability zero-drift pressure monitor; performs self-test at power-on and every 24 h. Use Value: Confirms ≥850 kPa minimum pad contact pressure prior to lift-meeting OSHA 1926.1400 structural safety validation requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar tyre pressure sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPX5700DP | Requires external ADC and temperature sensor; no integrated supply voltage monitoring | Lacks built-in TPMS timing control and low-power wake-up logic | Preferred when legacy analog signal chain already exists and cost-per-node is prioritized over integration |
| SP12A-T1 | Same die but different calibration trim; ±68 kPa pressure error over full −40 to +125°C range vs. ±48 kPa for SP12T-T1 | Targeted for non-critical axle positions where tighter accuracy is not mandated | Selected for secondary axle monitoring where cost reduction offsets relaxed accuracy spec |
Compared with MPX5700DP and SP12A-T1, SP12T-T1 delivers superior system-level integration, tighter error budget in the critical −20 to +70°C operating band, and native support for duty-cycled TPMS architectures-reducing BOM count by three components and PCB area by 32%.
Availability
SP12T-T1 is available at Aetrix Electronics and suitable for truck trailer tyre monitoring, bus fleet centralized diagnostics, mining equipment crawler tyres, and construction crane outrigger monitoring requiring stable component supply across multi-year vehicle production programs.
Supply support for SP12T-T1 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 automotive, power management, and sensor solutions, with global R&D and manufacturing infrastructure.
The SP12T-T1 belongs to Infineon's TPMS sensor portfolio, engineered specifically for high-reliability, high-volume tyre pressure monitoring in commercial vehicles operating under extreme thermal and mechanical stress.
FAQ
What is the absolute maximum pressure rating for SP12T-T1?
The SP12T-T1 has an absolute maximum pressure rating of 3300 kPa, verified per SensoNor's 2003 Product Brief. This rating applies to prolonged static exposure and exceeds typical burst pressures of heavy-vehicle tyres by 2.3×, providing robust safety margin against sudden overinflation or impact-induced pressure spikes.
Does SP12T-T1 support I²C communication?
SP12T-T1 uses a proprietary 2-wire asynchronous serial interface with open-drain DATA and CMOS-compatible CLK lines. While timing and protocol differ from standard I²C, it is electrically compatible with I²C GPIO pins and requires only minor firmware adaptation-no level-shifting or additional transceivers needed.
How is temperature compensation implemented in SP12T-T1?
Temperature compensation is performed internally by the integrated ASIC using real-time readings from the on-die temperature sensor. The compensation algorithm applies factory-trimmed polynomial coefficients stored in nonvolatile memory, correcting pressure output across −40°C to +125°C with no host MCU intervention required.
Can SP12T-T1 operate below 1.8 V supply?
No. SP12T-T1 is specified to operate only within 1.8–3.6 V. Below 1.8 V, internal bandgap reference and ADC circuitry fail to stabilize, resulting in invalid or missing measurements. Undervoltage lockout is not integrated; external supervision circuitry must enforce this limit in battery-powered designs.
SP12T-T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Sensor Type:
- -
- Output Type:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
SP12T-T1 FAQ
1.How can I place an order for SP12T-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SP12T-T1 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 SP12T-T1 reliable?
The price and inventory of SP12T-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SP12T-T1 is usually 5 days.
3.What payment methods are accepted for SP12T-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SP12T-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SP12T-T1?
SP12T-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SP12T-T1 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 SP12T-T1?
For technical support, including SP12T-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SP12T-T1 requirements.
6.How does Aetrix verify that SP12T-T1 is sourced from the original manufacturer or authorized distributors?
All SP12T-T1 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 SP12T-T1 meets industry standards.
7.What is the process for return or replacement of SP12T-T1?
All SP12T-T1 units undergo pre-shipment inspection (PSI). If there is an issue with SP12T-T1, 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 SP12T-T1 part is unused and in its original packaging.
Return procedure for SP12T-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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