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NXP Semiconductors NCF2951MTT/TPE080J
- Part No.:
- NCF2951MTT/TPE080J
- Manufacturer:
- NXP Semiconductors
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- -
- Datasheet:
-
NCF2951MTT/TPE080J.pdf
- Description:
- IC PASS ENTRY 125KHZ
- Quantity:
- Payment:
- Shipping:
Inventory:2,861
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Product details
Overview
NCF2951MTT/TPE080J from NXP Semiconductors is a fourth-generation keyless entry/go IC with integrated 16-bit RISC microcontroller, 3-channel active 125 kHz LF interface, and 3D security transponder functionality. It delivers ultra-low power consumption (typ. 1.8 µA standby), 2 KB EEPROM, 16 KB EROM + 8 KB ROM, and supports AES-128 and 96-bit crypto protocols for automotive immobilizer and proximity authentication.
For engineers reviewing the NCF2951MTT/TPE080J datasheet, NCF2951MTT/TPE080J pinout, NCF2951MTT/TPE080J application, or NCF2951MTT/TPE080J equivalent, this device is selected for secure, battery-efficient vehicle access systems requiring precise inside/outside detection, RSSI-based key localization, and dual-mode (active LF + passive backup) operation.
Technical Context
The NCF2951MTT/TPE080J implements a dedicated 16-bit RISC core with hardware-accelerated cryptographic unit supporting AES-128, 96-bit, and legacy car access protocols. Its 3D active LF frontend enables simultaneous 3-axis field measurement at 125 kHz for robust spatial detection.
It integrates a multi-mode crypto engine, 3-channel PWM for RGB LED feedback, 21 I/O ports (including 8 wake-up inputs), and dual power domains (CVDDC/VBATA) to sustain operation during low-battery backup mode using passive LF coupling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC microcontroller with hardware crypto accelerator |
| LF Interface | 3-channel active 125 kHz frontend + 1-channel passive LF for immobilizer backup |
| Memory | 2 KB EEPROM (non-volatile configuration), 16 KB EROM + 8 KB ROM (firmware/app storage), 512 B RAM |
| Crypto Support | AES-128, 96-bit, and NXP car access/immobilizer standard protocols |
| Power Consumption | 1.8 µA typical standby current; supports battery life > 5 years in key fob applications |
| I/O Capability | 21 general-purpose I/O pins, including 8 wake-up/button inputs and 2 SPI interfaces |
| Package | TSSOP38 (38-pin thin shrink small outline package, 0.5 mm pitch) |
Pinout & Package
TSSOP38 package with exposed thermal pad; 38-pin surface-mount footprint optimized for compact key fob PCB layouts and thermal management in sealed enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDC / VSS | Core power supply / ground | Digital core domain (1.8–3.6 V); decoupling required per NXP layout guidelines |
| VBAT / VBATA / VSSA | Battery input / analog supply / analog ground | Direct Li-ion/Li-MnO₂ battery connection; separate analog domain for ADC and LF frontend stability |
| IN1P/IN1N, IN2P/IN2N, IN3P/IN3N | Differential LF antenna inputs | Three independent 125 kHz differential receiver channels for X/Y/Z axis field sensing |
| P10–P17, P20–P27, P30–P34 | Configurable GPIO / peripheral I/O | Supports wake-up, button scan, SPI, PWM (RGB LED), buzzer drive, and ADC inputs |
| MSCL / MSDA | SPI clock / data lines | Primary interface for external UHF transceiver (e.g., PCF790 or PQJ7980) communication |
Key Features
| Feature | Design Value |
|---|---|
| 3D Active LF Detection | Enables accurate spatial localization of key fob relative to vehicle door handle without mechanical switches or additional sensors |
| Passive LF Backup Mode | Allows full keyless entry function even with depleted battery via energy harvesting from vehicle's LF field |
| Hardware Crypto Engine | Accelerates AES-128 and 96-bit challenge-response authentication, reducing CPU load and timing vulnerability |
| Integrated RGB LED PWM | Drives color-coded status feedback (e.g., green = authenticated, red = timeout) without external driver IC |
| Multi-Voltage I/O Domain | Supports direct interfacing to 1.8 V UHF transceivers and 3.3 V peripherals without level shifters |
Applications
| Smart Key Fob | Vehicle Door Handle Module |
|---|---|
Use Scenario: Compact, coin-cell-powered key fob used for hands-free entry and push-button start. IC Role / Device Role / Timing Role: Central security controller executing LF challenge/response, UHF transmission coordination, and crypto processing. Use Value: Enables >5-year battery life via 1.8 µA standby and passive backup, while supporting 3D detection for reliable inside/outside discrimination. | Use Scenario: Embedded module inside door handle housing generating 125 kHz LF fields and receiving responses. IC Role / Device Role / Timing Role: LF field generator and RSSI analyzer; measures signal strength across three axes to determine key position. Use Value: Eliminates need for separate LF transmitter ICs and discrete RSSI circuitry-reducing BOM count by ≥4 components. |
| Immobilizer Basestation | Aftermarket Key Programming Tool |
Use Scenario: In-vehicle immobilizer coil system that powers and authenticates key fobs during engine start. IC Role / Device Role / Timing Role: Passive LF initiator and crypto verifier; provides backup power and challenge signal when key battery is low. Use Value: Maintains compliance with ISO 14443-A and SAE J2931/2 standards for fail-safe vehicle authorization. | Use Scenario: Handheld diagnostic tool used by dealerships to program new keys or replace lost fobs. IC Role / Device Role / Timing Role: Secure bootloader host and key provisioning engine; validates firmware signatures before writing to EEPROM. Use Value: Supports field-upgradable security algorithms and customer-specific ROM code injection without chip re-spin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar keyless entry/go applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCF2952MTT/TPE080J | Same TSSOP38 package and pinout; lacks integrated 3D transponder; uses 1D LF-only architecture | Targeted for cost-sensitive entry-only systems without push-to-start or interior presence detection | Select when 3D spatial awareness is not required and BOM cost reduction is prioritized |
| PCF7953 | 8-bit core, 125 kHz 3D LF frontend, no UHF interface; requires external transceiver and separate crypto co-processor | Legacy keyless entry designs with modular UHF and crypto implementation | Choose only for backward compatibility in existing ACTIC-Pro platform upgrades |
Compared with NCF2951MTT/TPE080J, the NCF2952MTT/TPE080J reduces system complexity for entry-only use cases but omits 3D transponder capability, while the PCF7953 demands higher board area and external components to achieve comparable security and LF performance.
Availability
NCF2951MTT/TPE080J is available at Aetrix Electronics and suitable for automotive smart key fobs, door handle modules, immobilizer basestations, and aftermarket programming tools requiring stable component supply and long-term lifecycle support.
Supply support for NCF2951MTT/TPE080J 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 car access, RFID, and embedded security.
The NCF2951MTT/TPE080J belongs to NXP's ACTIC-4G product line, engineered specifically for next-generation keyless entry/go systems demanding high LF sensitivity, low-power 3D detection, and integrated cryptographic assurance.
FAQ
What is the primary function of the NCF2951MTT/TPE080J in automotive keyless systems?
The NCF2951MTT/TPE080J serves as the central secure controller in automotive keyless entry/go systems, performing 125 kHz 3D LF field generation and reception, cryptographic challenge-response authentication, and coordination with external UHF transceivers. Its integrated 3D transponder enables precise inside/outside detection critical for push-to-start functionality. The NCF2951MTT/TPE080J operates at ultra-low power to extend key fob battery life beyond five years.
Does the NCF2951MTT/TPE080J support passive LF backup mode, and how does it work?
Yes, the NCF2951MTT/TPE080J supports passive LF backup mode for operation when the key fob battery is depleted. In this mode, the vehicle's LF basestation supplies energy through electromagnetic coupling to power the NCF2951MTT/TPE080J's internal circuitry, enabling continued authentication. This feature ensures fail-safe vehicle access and complies with SAE J2931/2 requirements. The NCF2951MTT/TPE080J automatically transitions between active and passive modes without firmware intervention.
What memory resources are available on the NCF2951MTT/TPE080J for customer firmware and configuration?
The NCF2951MTT/TPE080J provides 16 KB of user-programmable EROM, 8 KB of masked ROM containing NXP's boot code and protocol stacks, 2 KB of EEPROM for persistent configuration and counter storage, and 512 bytes of RAM for runtime variables. These resources support full implementation of ISO 14443-A compliant transponder logic and custom application layers. All memory blocks are accessible via the NCF2951MTT/TPE080J's integrated debug interface and protected by write-lock mechanisms.
How many LF antenna channels does the NCF2951MTT/TPE080J support, and what is their role?
The NCF2951MTT/TPE080J supports three independent differential LF antenna channels (IN1P/IN1N, IN2P/IN2N, IN3P/IN3N) operating at 125 kHz. These channels enable simultaneous measurement of magnetic field strength along X, Y, and Z axes-forming the basis for 3D spatial detection used to determine whether the key fob is inside or outside the vehicle. This capability is essential for secure push-to-start authorization and eliminates reliance on GPS or inertial sensors. Each channel is calibrated internally by the NCF2951MTT/TPE080J.
Is the NCF2951MTT/TPE080J pin-compatible with earlier NXP keyless ICs like the PCF7952 or PCF7953?
No, the NCF2951MTT/TPE080J is not pin-compatible with the PCF7952 or PCF7953. It uses a 38-pin TSSOP package with a distinct pin assignment optimized for 3D LF sensing, multi-voltage I/O, and integrated crypto peripherals. The PCF7952/PCF7953 employ smaller packages (e.g., HVQFN24) and lack dedicated 3D channel inputs or hardware AES acceleration. Migration to the NCF2951MTT/TPE080J requires PCB redesign and firmware adaptation due to architectural differences in the NCF2951MTT/TPE080J.
NCF2951MTT/TPE080J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Passive Entry/Start
- Frequency:
- 125kHz
- Standards:
- -
- Interface:
- SPI
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
NCF2951MTT/TPE080J FAQ
1.How can I place an order for NCF2951MTT/TPE080J through Aetrix?
Please submit a Request for Quotation (RFQ) for NCF2951MTT/TPE080J 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 NCF2951MTT/TPE080J reliable?
The price and inventory of NCF2951MTT/TPE080J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCF2951MTT/TPE080J is usually 5 days.
3.What payment methods are accepted for NCF2951MTT/TPE080J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCF2951MTT/TPE080J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCF2951MTT/TPE080J?
NCF2951MTT/TPE080J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCF2951MTT/TPE080J 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 NCF2951MTT/TPE080J?
For technical support, including NCF2951MTT/TPE080J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCF2951MTT/TPE080J requirements.
6.How does Aetrix verify that NCF2951MTT/TPE080J is sourced from the original manufacturer or authorized distributors?
All NCF2951MTT/TPE080J 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 NCF2951MTT/TPE080J meets industry standards.
7.What is the process for return or replacement of NCF2951MTT/TPE080J?
All NCF2951MTT/TPE080J units undergo pre-shipment inspection (PSI). If there is an issue with NCF2951MTT/TPE080J, 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 NCF2951MTT/TPE080J part is unused and in its original packaging.
Return procedure for NCF2951MTT/TPE080J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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