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NXP Semiconductors FXPS71407T1
- Part No.:
- FXPS71407T1
- Manufacturer:
- NXP Semiconductors
- Category:
- Pressure Sensors, Transducers
- Package:
- 16-QFN Exposed Pad
- Datasheet:
-
FXPS71407T1.pdf
- Description:
- AUTOMOTIVE SAFETY PRESSURE SENSO
- Quantity:
- Payment:
- Shipping:
Inventory:2,889
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Product details
Overview
FXPS71407T1 from NXP Semiconductors is a dual-protocol (DSI3 and PSI5) absolute and relative pressure sensor with redundant transducers, 40 kPa–140 kPa absolute range, ±7.0 % accuracy over –40 °C to 85 °C, and integrated sigma-delta ADC with selectable low-pass filtering for automotive engine intake, turbocharger, and brake vacuum monitoring.
For engineers reviewing the FXPS71407T1 datasheet, FXPS71407T1 pinout, FXPS71407T1 application, or FXPS71407T1 equivalent, this page delivers verified technical context, validated pin functions, real-world use cases in daisy-chained automotive sensor networks, and confirmed alternative parts with documented protocol and filter differences.
Technical Context
The FXPS71407T1 integrates two redundant capacitive pressure transducers, a capacitance-to-voltage converter with anti-aliasing filter, and a sigma-delta ADC with sinc filtering. Its DSP supports configurable low-pass filters: 370 Hz (2-pole), 400 Hz (3-pole/4-pole), or 800/1000 Hz for absolute pressure, plus a dedicated 0.16 Hz (1-pole) LPF for P₀ reference value generation.
It implements dual-standard physical layer compliance: DSI3 with discovery/command/periodic/background diagnostics modes, and PSI5 v2.1 supporting P10P-500/3L, A10P-228/1L, and P10CRC-xxx/xx modes - with programmable time slots (1 µs resolution), selectable baud rates (125/189 kBd), and error detection via even parity or 3-bit CRC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Absolute pressure range | 40 kPa to 140 kPa - covers full atmospheric to boosted intake manifold pressures in gasoline and diesel engines. |
| Accuracy | ±7.0 % (PREL) - guaranteed over –40 °C to 85 °C for lifetime operation in under-hood environments. |
| Operating temperature | –40 °C to 125 °C - enables placement in high-temperature zones including near exhaust manifolds or turbochargers. |
| Communication protocols | DSI3 (default) or one-time programmable PSI5 v2.1 - supports legacy DSI3 infrastructure and modern PSI5 daisy-chain topologies without hardware change. |
| Filter options | Selectable LPFs: 370 Hz (2-pole), 400 Hz (3-/4-pole), 800/1000 Hz for PABS; 0.16 Hz (1-pole) for P₀ - enables dynamic response tuning per application (e.g., fast transient capture vs. noise suppression). |
| Output resolution | 10-bit ΔP/P₀ - provides normalized differential pressure ratio output suitable for closed-loop control of EGR or VGT systems. |
| Package | HQFN16, 4 mm × 4 mm × 1.98 mm, SOT1573-2(SC) - thermally enhanced QFN with exposed die attach pad for reliable heat dissipation in sealed sensor housings. |
Pinout & Package
Pb-free HQFN16 package (SOT1573-2(SC)), 4 mm × 4 mm × 1.98 mm body, 0.8 mm pitch, 16 terminals, thermal pad (Pin 17) requiring connection to VSS per footprint guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BUS_O (Pin 1) | Supply out | Provides regulated supply to next daisy-chained slave; requires external capacitor to VSS in DSI3 mode; recommended unterminated in PSI5 mode. |
| BUSSW_H (Pin 2) | High-side bus switch driver | Drives gate of external P-FET for DSI3 daisy chain; requires external pullup; recommended unterminated in PSI5 mode. |
| BUSSW_L (Pins 3, 5) | Low-side bus switch driver | Drives gate of external N-FET for PSI5 daisy chain; requires external pulldown; recommended unterminated in DSI3 mode. |
| BUSRTN/VSS (Pins 4, 15) | Supply return | Primary ground reference nodes; must be connected to system ground with low-impedance path. |
| VBUF (Pin 13) | Power supply buffer | Internal regulator output for EMC-immune analog/digital circuitry; requires external decoupling capacitor to VSS. |
| BUS_I/VCC (Pin 16) | Supply and communication | Primary power input (also modulates PSI5 response current); requires external decoupling capacitor to BUSRTN. |
| PAD (Pin 17) | Die attach pad | Thermal and electrical ground connection; must be soldered to PCB ground plane per Section 12.1 footprint requirements. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-protocol support | Factory-default DSI3 with one-time OTP programming to PSI5 v2.1 - eliminates need for separate part numbers across platform variants. |
| Redundant transducers | Two independent capacitive pressure sensing elements with cross-check capability - improves functional safety compliance for ASIL-B systems. |
| Programmable timing resolution | 1 µs time slot granularity in PSI5 mode - enables precise synchronization across multi-sensor daisy chains in engine control units. |
| Configurable error detection | Selectable even parity or 3-bit CRC per PSI5 frame - allows trade-off between overhead and robustness in noisy automotive environments. |
| Integrated diagnostics | Background diagnostics during periodic data collection (DSI3) and continuity monitor + voltage error flags (VBUF/BUSIN/INTREG) - reduces need for external supervision circuitry. |
Applications
| Engine Intake Manifold Monitoring | Turbocharger Boost Control |
|---|---|
|
Use Scenario: Real-time measurement of absolute pressure upstream of throttle body in gasoline direct injection engines. IC Role / Device Role / Timing Role: Primary absolute pressure sensor providing feedback to ECU for air mass calculation and torque estimation. Use Value: ±7.0 % accuracy over –40 °C to 85 °C ensures consistent volumetric efficiency modeling across ambient and operating conditions. |
Use Scenario: Closed-loop regulation of turbocharger wastegate position using differential pressure across compressor and turbine. IC Role / Device Role / Timing Role: Relative pressure (ΔP/P₀) sensor delivering 10-bit normalized output synchronized to PSI5 daisy-chain timing. Use Value: Selectable 800 Hz/1000 Hz LPF enables fast transient response to boost spikes while suppressing mechanical vibration noise. |
| Brake Vacuum Assist System | Exhaust Gas Recirculation (EGR) Valve Feedback |
|
Use Scenario: Monitoring vacuum level in brake booster reservoir for electric vacuum pump control in hybrid vehicles. IC Role / Device Role / Timing Role: Absolute pressure sensor operating in DSI3 discovery mode to identify physical location within chassis network. Use Value: Redundant transducers and internal continuity monitor provide diagnostic coverage meeting ISO 26262 ASIL-B requirements. |
Use Scenario: Measuring pressure differential across EGR valve to verify flow rate and detect clogging or sticking. IC Role / Device Role / Timing Role: Dual-mode sensor configured as PSI5 slave in multi-node exhaust subsystem with programmable time slots. Use Value: 1 µs time slot resolution allows deterministic scheduling of up to 16 sensors on single PSI5 bus without collision. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar absolute and relative pressure sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| FXPS7140P7T1 | PSI5-only (no DSI3 support); identical pressure range, accuracy, and package. | Designed for new PSI5-native platforms; lacks DSI3 discovery and command modes required for legacy integration. | Select FXPS7140P7T1 only when PSI5 is mandated and DSI3 compatibility is unnecessary. |
| MPXV7025DP | Analog output (ratiometric 0–5 V), no digital interface; single transducer; no built-in diagnostics or filtering. | Requires external ADC, microcontroller, and signal conditioning; unsuitable for daisy-chain or functional safety architectures. | Choose MPXV7025DP only for cost-sensitive, non-networked, non-safety-critical analog designs with simple calibration needs. |
Compared with FXPS71407T1, FXPS7140P7T1 removes DSI3 flexibility but simplifies protocol configuration, while MPXV7025DP shifts system complexity to external components and forfeits diagnostic capability, making FXPS71407T1 optimal for scalable, safety-aware automotive networks.
Availability
FXPS71407T1 is available at Aetrix Electronics and suitable for engine management, turbocharger control, brake vacuum assist, and EGR system design requiring stable component supply across automotive production lifecycles.
Supply support for FXPS71407T1 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
NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with leadership in automotive MCUs, radar, and sensor interfaces.
The FXPS71407T1 belongs to NXP's automotive pressure sensor family, engineered specifically for ASIL-compliant, daisy-chain-capable engine and emissions control systems requiring dual-protocol interoperability and integrated diagnostics.
FAQ
What communication protocols does the FXPS71407T1 support?
The FXPS71407T1 supports both DSI3 and PSI5 v2.1 protocols. It ships with DSI3 as the default interface and can be one-time programmed to PSI5 mode via its OTP memory. Protocol selection is irreversible after programming, and the device does not support runtime switching between protocols. All timing, error detection, and daisy-chain configurations are protocol-specific and documented in Sections 2 and 5 of the FXPS71407T1 datasheet.
What is the pressure accuracy specification for FXPS71407T1 over temperature?
The FXPS71407T1 guarantees ±7.0 % accuracy over the extended temperature range of –40 °C to 85 °C for its entire operational life. This specification applies to the 40 kPa–140 kPa absolute pressure range and is validated per NXP's PREL (preliminary) characterization. Accuracy outside this range or beyond 85 °C is not guaranteed and must be evaluated per application requirements.
How is redundancy implemented in the FXPS71407T1 pressure sensing architecture?
The FXPS71407T1 incorporates two physically independent capacitive pressure transducers (P-CELL 0 and P-CELL 1) with separate C2V converters and signal paths. Their outputs are processed through the same DSP pipeline, enabling cross-validation and fault detection. Redundancy supports diagnostic coverage for ASIL-B compliance and is leveraged in internal error registers like DSP_ERR, which aggregates PABS_HIGH, PABS_LOW, and ST_ERROR flags.
Can the FXPS71407T1 operate in both absolute and relative pressure modes simultaneously?
No. The FXPS71407T1 delivers absolute pressure (PABS) and relative pressure (ΔP/P₀) as distinct, separately accessible outputs. Absolute pressure is reported as a calibrated value with selectable LPF; relative pressure is derived from the ratio of differential pressure to a stored reference P₀ value and output as a 10-bit normalized quantity. Both values are available concurrently via register reads ($62–$65 for sensor data), but the device does not compute or output a real-time mathematical difference between them.
What are the mandatory external components required for FXPS71407T1 operation?
Four external components are mandatory: (1) a decoupling capacitor between BUS_I/VCC (Pin 16) and BUSRTN (Pins 4/15); (2) a capacitor between VBUF (Pin 13) and VSS; (3) an external capacitor between BUS_O (Pin 1) and VSS in DSI3 mode; and (4) the die attach pad (Pin 17) must be soldered to a PCB ground plane. Additional components - such as pullup/pulldown resistors for BUSSW_H/BUSSW_L - are required only when using daisy-chain functionality in respective protocols.
FXPS71407T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 16-QFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Board Mount
- Pressure Type:
- Absolute
- Operating Pressure:
- 5.8PSI ~ 20.31PSI (40kPa ~ 140kPa)
- Output Type:
- -
- Output:
- -
- Accuracy:
- -
- Voltage - Supply:
- -
- Port Size:
- -
- Port Style:
- No Port
- Features:
- -
- Termination Style:
- -
- Maximum Pressure:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 16-HQFN (4x4)
FXPS71407T1 FAQ
1.How can I place an order for FXPS71407T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for FXPS71407T1 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 FXPS71407T1 reliable?
The price and inventory of FXPS71407T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FXPS71407T1 is usually 5 days.
3.What payment methods are accepted for FXPS71407T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FXPS71407T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FXPS71407T1?
FXPS71407T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FXPS71407T1 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 FXPS71407T1?
For technical support, including FXPS71407T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FXPS71407T1 requirements.
6.How does Aetrix verify that FXPS71407T1 is sourced from the original manufacturer or authorized distributors?
All FXPS71407T1 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 FXPS71407T1 meets industry standards.
7.What is the process for return or replacement of FXPS71407T1?
All FXPS71407T1 units undergo pre-shipment inspection (PSI). If there is an issue with FXPS71407T1, 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 FXPS71407T1 part is unused and in its original packaging.
Return procedure for FXPS71407T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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