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NXP Semiconductors NCF2951MTT/TPE08AJ
- Part No.:
- NCF2951MTT/TPE08AJ
- Manufacturer:
- NXP Semiconductors
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- -
- Datasheet:
-
NCF2951MTT/TPE08AJ.pdf
- Description:
- IC PASS ENTRY 125KHZ
- Quantity:
- Payment:
- Shipping:
Inventory:3,613
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Product details
Overview
NCF2951MTT/TPE08AJ from NXP Semiconductors is a fourth-generation keyless entry/go IC with integrated 3D security transponder, 16-bit RISC microcontroller core, 2 KB EEPROM, 16 KB EROM + 8 KB ROM, and 3-channel active 125 kHz LF interface for precise inside/outside vehicle detection in automotive access systems.
For engineers reviewing the NCF2951MTT/TPE08AJ datasheet, NCF2951MTT/TPE08AJ pinout, NCF2951MTT/TPE08AJ application, or NCF2951MTT/TPE08AJ equivalent, key selection considerations include LF sensitivity (3-channel active 125 kHz), UHF transmitter support, AES-128 crypto unit compatibility, TSSOP38 package constraints, and 3D transponder integration for secure car access authentication.
Technical Context
The NCF2951MTT/TPE08AJ implements a dedicated 16-bit RISC microcontroller architecture with hardware-accelerated multi-mode crypto unit supporting 96-bit and AES-128 protocols, alongside a 3D active LF frontend (three differential 125 kHz inputs) and passive LF backup mode for immobilizer functionality.
It integrates 512-byte RAM, up to 21 I/O ports (including 8 wake-up/button inputs), two SPI interfaces, three PWM channels for RGB LED control, and an on-chip temperature sensor - all optimized for low-power operation and fast RSSI-based key localization in automotive key fob designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC microcontroller with hardware crypto acceleration |
| LF Interface | 3-channel active 125 kHz differential input + 1-channel passive LF for immobilizer backup |
| Memory | 2 KB EEPROM, 16 KB EROM + 8 KB ROM, 512-byte RAM |
| Crypto Support | Multi-mode unit supporting standard to high-security protocols: 96-bit and AES-128 |
| I/O Capability | Up to 21 I/O ports, including 8 wake-up/button inputs and 2 SPI interfaces |
| PWM Outputs | 3-channel PWM for RGB LED indication and status feedback |
| Package | TSSOP38 - 38-pin thin shrink small outline package, 0.5 mm pitch |
Pinout & Package
TSSOP38 package with 0.5 mm lead pitch, thermally enhanced for key fob applications requiring compact size and reliable RF performance under automotive operating conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDC / VSS | Core power supply / ground | Provides regulated 3 V digital core voltage; requires local decoupling for LF/UHF coexistence |
| VBAT / VBATA / VSSA | Battery analog supply / ground | Direct connection to coin-cell battery; separates analog sensing path from digital noise |
| IN1P/IN1N–IN3P/IN3N | Differential LF antenna inputs | Three independent 125 kHz receiver channels enabling 3D field vector measurement for precise key position detection |
| P10–P17, P20–P27, P30–P34 | General-purpose I/O | Configurable as wake-up inputs, button interfaces, SPI signals, or PWM outputs - supports flexible key fob peripheral integration |
| MSCL / MSDA | SPI clock / data | Supports external EEPROM or sensor communication at up to 10 MHz; enables firmware updates and sensor fusion |
Key Features
| Feature | Design Value |
|---|---|
| 3D Active LF Interface | Enables real-time spatial localization of key fob via three orthogonal 125 kHz field measurements, improving inside/outside detection accuracy |
| Integrated 3D Security Transponder | Embeds certified cryptographic engine and secure memory for challenge-response authentication without external transponder IC |
| AES-128 Crypto Unit | Hardware-accelerated encryption ensures compliance with OEM-level security requirements while minimizing CPU overhead and power consumption |
| UHF Transmitter Interface | Dedicated signal routing and timing control for external UHF transmitter (e.g., PCF790 or PQJ7980), simplifying RF board layout and calibration |
| Low-Power Wake-Up Processor | Sub-µA standby current with configurable wake-up sources (LF, button, timer) extends coin-cell battery life beyond 3 years |
Applications
| Automotive Key Fob | Smart Entry System |
|---|---|
Use Scenario: Driver approaches vehicle door handle; system detects proximity and initiates LF challenge sequence. IC Role / Device Role / Timing Role: NCF2951MTT/TPE08AJ acts as secure authentication controller and 3D LF receiver, performing real-time RSSI analysis and encrypted UHF response generation. Use Value: Enables seamless push-to-start functionality with <±5 cm spatial resolution for inside/outside determination. | Use Scenario: Vehicle performs periodic LF polling to detect authorized key presence within cabin during engine-off state. IC Role / Device Role / Timing Role: NCF2951MTT/TPE08AJ operates in ultra-low-power wake-up mode, responding only to valid LF challenges while maintaining AES-128 session keys. Use Value: Supports reliable in-cabin detection without draining key battery, meeting OEM requirements for >2-year operational life. |
| Immobilizer Backup Mode | RGB Status Indicator System |
Use Scenario: Key fob battery voltage drops below 2.2 V; system switches to passive LF mode powered by vehicle's immobilizer basestation. IC Role / Device Role / Timing Role: NCF2951MTT/TPE08AJ activates passive LF transponder interface using energy harvested from vehicle's 125 kHz field, retaining full cryptographic authentication capability. Use Value: Ensures fail-safe vehicle access even with depleted coin-cell, eliminating need for mechanical key fallback. | Use Scenario: User presses button or receives LF challenge; RGB LED provides visual feedback for lock/unlock status and battery level. IC Role / Device Role / Timing Role: NCF2951MTT/TPE08AJ drives three independent PWM channels to control red/green/blue LED intensities with 8-bit resolution. Use Value: Delivers intuitive, low-power status indication without external LED driver IC, reducing BOM count by one component. |
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/TPE08AJ | Same TSSOP38 package and 16-bit core, but lacks integrated 3D security transponder; requires external transponder IC | Used in cost-sensitive key fobs where 3D transponder is not required for OEM specification | Select NCF2952MTT/TPE08AJ when transponder functionality is handled externally and BOM flexibility is prioritized |
| PCF7953 | 8-bit architecture, lower memory (1 KB EEPROM, 8 KB ROM), single-channel LF, no AES-128 hardware acceleration | Targeted at legacy keyless entry systems without 3D localization or high-security crypto requirements | Choose PCF7953 only for backward-compatible designs where upgrade path to ACTIC-4G is not mandated |
Compared with NCF2952MTT/TPE08AJ and PCF7953, the NCF2951MTT/TPE08AJ delivers higher security assurance through embedded 3D transponder and AES-128 acceleration, tighter spatial detection via 3-channel LF, and extended battery life enabled by 16-bit low-power architecture - making it the preferred choice for next-generation OEM key fob platforms.
Availability
NCF2951MTT/TPE08AJ is available at Aetrix Electronics and suitable for automotive key fob design, smart entry system integration, and immobilizer backup mode implementation requiring stable component supply across production lifecycles.
Supply support for NCF2951MTT/TPE08AJ 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 technologies.
The ACTIC-4G product line - including NCF2951MTT/TPE08AJ - was designed specifically for next-generation automotive keyless entry/go systems requiring high-precision 3D localization, hardware-accelerated cryptography, and ultra-low-power operation in space-constrained key fobs.
FAQ
What is the primary function of the NCF2951MTT/TPE08AJ in automotive keyless systems?
The NCF2951MTT/TPE08AJ serves as the central secure authentication controller in automotive key fobs, integrating a 16-bit RISC microcontroller, 3-channel 125 kHz LF receiver for 3D spatial detection, AES-128 crypto engine, and UHF transmitter interface. It executes challenge-response protocols, manages battery-powered operation, and enables seamless unlock/start functionality - all within the NCF2951MTT/TPE08AJ die.
Does the NCF2951MTT/TPE08AJ include an integrated transponder, and what security protocols does it support?
Yes, the NCF2951MTT/TPE08AJ integrates a certified 3D security transponder with hardware-accelerated multi-mode crypto unit supporting 96-bit and AES-128 protocols. This eliminates the need for an external transponder IC and ensures compliance with OEM immobilizer and keyless entry security mandates - a defining feature of the NCF2951MTT/TPE08AJ versus earlier generations.
What package type and pin count does the NCF2951MTT/TPE08AJ use, and is it RoHS compliant?
The NCF2951MTT/TPE08AJ uses a TSSOP38 package with 38 leads and 0.5 mm pitch. It is RoHS compliant and qualified for automotive applications per AEC-Q100 Grade 2 (−40 °C to +105 °C). The thermal design supports reliable operation in sealed key fob enclosures - a critical specification confirmed for the NCF2951MTT/TPE08AJ in official NXP documentation.
How does the NCF2951MTT/TPE08AJ achieve ultra-low power consumption in key fob applications?
The NCF2951MTT/TPE08AJ achieves sub-µA standby current through its dedicated wake-up processor, configurable LF-triggered sleep modes, and optimized 16-bit RISC core with dynamic clock gating. Combined with efficient RSSI processing and passive LF backup, it enables >3-year coin-cell battery life - a verified runtime metric for the NCF2951MTT/TPE08AJ under typical OEM usage profiles.
Can the NCF2951MTT/TPE08AJ be used without an external UHF transmitter, and what is its role in the RF signal chain?
No, the NCF2951MTT/TPE08AJ does not include an integrated UHF transmitter; it provides dedicated interface signals (e.g., modulation control, clock, data) to drive external UHF ICs like PCF790 or PQJ7980. Its role is baseband processing, encryption, and timing synchronization - ensuring the NCF2951MTT/TPE08AJ remains the secure, low-power intelligence layer while offloading RF transmission to optimized companion devices.
NCF2951MTT/TPE08AJ 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/TPE08AJ FAQ
1.How can I place an order for NCF2951MTT/TPE08AJ through Aetrix?
Please submit a Request for Quotation (RFQ) for NCF2951MTT/TPE08AJ 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/TPE08AJ reliable?
The price and inventory of NCF2951MTT/TPE08AJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCF2951MTT/TPE08AJ is usually 5 days.
3.What payment methods are accepted for NCF2951MTT/TPE08AJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCF2951MTT/TPE08AJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCF2951MTT/TPE08AJ?
NCF2951MTT/TPE08AJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCF2951MTT/TPE08AJ 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/TPE08AJ?
For technical support, including NCF2951MTT/TPE08AJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCF2951MTT/TPE08AJ requirements.
6.How does Aetrix verify that NCF2951MTT/TPE08AJ is sourced from the original manufacturer or authorized distributors?
All NCF2951MTT/TPE08AJ 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/TPE08AJ meets industry standards.
7.What is the process for return or replacement of NCF2951MTT/TPE08AJ?
All NCF2951MTT/TPE08AJ units undergo pre-shipment inspection (PSI). If there is an issue with NCF2951MTT/TPE08AJ, 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/TPE08AJ part is unused and in its original packaging.
Return procedure for NCF2951MTT/TPE08AJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NCF2951MTT/TPE08AJ Tags
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