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NXP Semiconductors NCF2952XTT/T0E070J
- Part No.:
- NCF2952XTT/T0E070J
- Manufacturer:
- NXP Semiconductors
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
NCF2952XTT/T0E070J.pdf
- Description:
- IC KEYLSS ENT/GO 125KHZ 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,985
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Product details
Overview
NCF2952XTT/T0E070J from NXP Semiconductors is a fourth-generation keyless entry/go IC with 16-bit RISC microcontroller core, integrated 3-channel active 125 kHz LF interface, 2 kB EEPROM, 16 kB EROM + 8 kB ROM, and multi-mode crypto unit supporting AES-128 and 96-bit protocols for automotive secure access systems.
For engineers reviewing the NCF2952XTT/T0E070J datasheet, NCF2952XTT/T0E070J pinout, NCF2952XTT/T0E070J application, or NCF2952XTT/T0E070J equivalent, this page delivers verified technical context, validated package mapping to TSSOP38, confirmed I/O count (21 pins), LF sensitivity architecture, and real-world keyless system integration requirements including RSSI-based inside/outside detection and UHF response timing.
Technical Context
The NCF2952XTT/T0E070J implements a dedicated 16-bit RISC microcontroller core with hardware-accelerated cryptographic processing for AES-128 and 96-bit security protocols, alongside a 3-channel active LF frontend operating at 125 kHz for precise 3D field sensing and challenge-response handshaking.
It integrates a passive LF backup mode for immobilizer functionality, supports up to 8 wake-up/button inputs, includes 3-channel PWM for RGB LED control, and features on-chip RC oscillator plus temperature sensor for battery-powered key fob operation without external timing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC microcontroller with hardware crypto accelerator for real-time AES-128 encryption/decryption |
| LF Interface | 3-channel active 125 kHz frontend + 1-channel passive LF backup for immobilizer fallback operation |
| Memory | 2 kB EEPROM (non-volatile configuration), 16 kB EROM + 8 kB ROM (firmware storage), 512 B RAM (runtime data) |
| I/O Capability | 21 programmable I/O ports including 8 wake-up inputs and 2 SPI interfaces for peripheral expansion |
| Power Management | Ultra-low-power design enabling multi-year battery life in key fobs; integrated power/battery management unit |
| Security Support | Multi-mode crypto unit compliant with automotive keyless access and immobilization standards up to high-security level |
| PWM Outputs | 3 independent PWM channels for direct RGB LED color control without external driver ICs |
Pinout & Package
TSSOP38 package - thermally enhanced, surface-mount, 38-pin thin shrink small outline package with 0.5 mm pitch, optimized for compact key fob PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDC / VSS | Digital power supply / ground | Primary digital domain supply (CVDDC) and reference ground for core logic and I/O |
| VBAT / VBATA / VSSA | Analog power / analog ground | Separate analog supply and ground for LF frontend and ADC to minimize noise coupling |
| IN1P/IN1N–IN3P/IN3N | LF antenna differential inputs | Three fully differential 125 kHz LF receiver channels for 3D magnetic field vector measurement |
| P10–P17, P20–P34 | General-purpose I/O | 21 configurable pins including 8 wake-up capable inputs and 2 SPI master/slave interfaces |
| P15 (XCLK) | External clock input | Optional crystal oscillator connection point for precise timing when RC oscillator insufficient |
| MSCL / MSDA | SPI clock / data lines | Dedicated SPI interface pins supporting daisy-chain or multi-peripheral communication |
Key Features
| Feature | Design Value |
|---|---|
| 3-channel active LF frontend | Enables true 3D field localization for reliable inside/outside vehicle detection without mechanical switches or additional sensors |
| Integrated multi-mode crypto unit | Supports AES-128, 96-bit, and legacy protocols in hardware-eliminates need for external security co-processors |
| On-chip RC oscillator + temp sensor | Reduces BOM count by removing external crystal and temperature compensation circuitry in cost-sensitive key fobs |
| 3-channel PWM for RGB LEDs | Direct drive of status indicators with full-color feedback using only internal resources-no external LED drivers required |
| Passive LF backup mode | Ensures immobilizer functionality remains operational even with depleted battery via energy harvesting from vehicle LF field |
Applications
| Automotive Key Fob | Smart Entry System |
|---|---|
Use Scenario: Battery-powered remote key fob used for push-to-start and door unlock functions in passenger vehicles. IC Role / Device Role / Timing Role: Primary key-side controller handling LF challenge reception, cryptographic response generation, and UHF transmission timing. Use Value: Ultra-low-power 16-bit core and integrated LF frontend enable >5-year battery life while maintaining sub-meter position accuracy for inside/outside detection. | Use Scenario: Vehicle-mounted smart entry module detecting proximity and authenticating keys during approach. IC Role / Device Role / Timing Role: Host-side LF transmitter and UHF receiver coordinating with NCF2952XTT/T0E070J-equipped keys via synchronized challenge-response handshake. Use Value: High-sensitivity 3-channel LF interface allows precise 3D field mapping to distinguish key location relative to doors, pillars, and roof-reducing false triggers. |
| Immobilizer Backup Mode | RGB Status Indicator System |
Use Scenario: Low-battery fallback operation where key fob powers up via induced energy from vehicle LF field. IC Role / Device Role / Timing Role: Passive LF transponder emulator using on-chip resonant circuit and modulation capability for legacy immobilizer compatibility. Use Value: Maintains regulatory compliance and OEM interoperability without requiring separate immobilizer IC or additional antenna traces. | Use Scenario: Visual feedback system indicating lock/unlock status, battery level, or authentication state in key fobs. IC Role / Device Role / Timing Role: Direct RGB LED controller generating synchronized color transitions using three independent PWM outputs. Use Value: Eliminates need for external LED driver ICs and reduces PCB area by 30% compared to discrete LED control solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar keyless entry/go applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCF2951XTT/T0E070J | Includes embedded 3D security transponder; NCF2952 lacks integrated transponder but offers identical LF/UHF architecture and memory map | Required when OEM mandates embedded transponder in key fob; NCF2952 used where transponder is external or not required | Select NCF2952XTT/T0E070J for cost-optimized designs without transponder integration needs |
| PCF7953 | 8-bit microcontroller core, lower memory (1 kB EEPROM, 8 kB ROM), single-channel LF frontend, no AES-128 support | Suitable for legacy keyless systems without 3D detection or high-security crypto requirements | Choose PCF7953 only for backward-compatible upgrades where 16-bit performance and AES-128 are unnecessary |
Compared with NCF2952XTT/T0E070J, NCF2951XTT/T0E070J adds transponder functionality at same pinout and firmware compatibility, while PCF7953 provides a lower-cost, lower-performance path for non-3D, non-AES applications-making NCF2952XTT/T0E070J the optimal balance of security, sensing, and integration for new key fob designs.
Availability
NCF2952XTT/T0E070J is available at Aetrix Electronics and suitable for automotive key fob production, smart entry system development, and immobilizer-compliant vehicle access modules requiring stable component supply and long-term lifecycle support.
Supply support for NCF2952XTT/T0E070J 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 leader focused on automotive, industrial, and IoT applications, with deep expertise in secure identification and wireless connectivity.
The ACTIC-4G product line-including NCF2952XTT/T0E070J-is engineered 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 NCF2952XTT/T0E070J in automotive keyless systems?
The NCF2952XTT/T0E070J serves as the central microcontroller and security processor in automotive key fobs, managing LF challenge reception, cryptographic response generation using AES-128 or 96-bit algorithms, UHF transmission timing, and 3D field analysis for inside/outside detection. Its integrated 3-channel 125 kHz frontend and hardware crypto unit make it essential for modern secure keyless entry/go implementations.
Does the NCF2952XTT/T0E070J support passive LF backup for immobilizer functionality?
Yes, the NCF2952XTT/T0E070J includes a dedicated passive LF mode that enables energy harvesting from the vehicle's LF field to power the device when the battery is depleted. This ensures continued immobilizer compliance and authentication capability without requiring a separate transponder IC or external circuitry-maintaining OEM certification requirements even under low-power conditions.
What memory resources are available on the NCF2952XTT/T0E070J for customer firmware deployment?
The NCF2952XTT/T0E070J provides 16 kB of EROM and 8 kB of ROM for customer application code storage, 2 kB of EEPROM for configuration and security key retention, and 512 bytes of RAM for runtime variables. These resources are mapped and accessible via the 16-bit RISC core without external memory expansion, supporting full-featured key fob firmware including crypto, sensor processing, and RF protocol stacks.
How many I/O pins does the NCF2952XTT/T0E070J offer, and what are their key capabilities?
The NCF2952XTT/T0E070J provides 21 programmable I/O ports in its TSSOP38 package, including 8 wake-up capable inputs for button press detection, 2 SPI interfaces for peripheral communication, and dedicated PWM outputs for RGB LED control. All I/Os are software-configurable for pull-up/down, interrupt triggering, and alternate functions-enabling flexible integration into compact key fob PCB layouts without external GPIO expanders.
Is the NCF2952XTT/T0E070J pin-compatible with earlier NXP keyless ICs like the PCF7952 or PCF7953?
No, the NCF2952XTT/T0E070J is not pin-compatible with PCF7952 or PCF7953 due to architectural differences including increased I/O count, 3-channel LF frontend layout, and TSSOP38 packaging versus older SOIC or TSSOP20 packages. Migration requires PCB redesign and firmware adaptation to leverage the 16-bit core, expanded memory, and enhanced security features of the NCF2952XTT/T0E070J.
NCF2952XTT/T0E070J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- -
- Frequency:
- 125kHz
- Standards:
- -
- Interface:
- SPI
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-TSSOP
NCF2952XTT/T0E070J FAQ
1.How can I place an order for NCF2952XTT/T0E070J through Aetrix?
Please submit a Request for Quotation (RFQ) for NCF2952XTT/T0E070J 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 NCF2952XTT/T0E070J reliable?
The price and inventory of NCF2952XTT/T0E070J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCF2952XTT/T0E070J is usually 5 days.
3.What payment methods are accepted for NCF2952XTT/T0E070J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCF2952XTT/T0E070J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCF2952XTT/T0E070J?
NCF2952XTT/T0E070J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCF2952XTT/T0E070J 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 NCF2952XTT/T0E070J?
For technical support, including NCF2952XTT/T0E070J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCF2952XTT/T0E070J requirements.
6.How does Aetrix verify that NCF2952XTT/T0E070J is sourced from the original manufacturer or authorized distributors?
All NCF2952XTT/T0E070J 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 NCF2952XTT/T0E070J meets industry standards.
7.What is the process for return or replacement of NCF2952XTT/T0E070J?
All NCF2952XTT/T0E070J units undergo pre-shipment inspection (PSI). If there is an issue with NCF2952XTT/T0E070J, 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 NCF2952XTT/T0E070J part is unused and in its original packaging.
Return procedure for NCF2952XTT/T0E070J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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