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NXP Semiconductors NCF2952XTT/T0E080J
- Part No.:
- NCF2952XTT/T0E080J
- Manufacturer:
- NXP Semiconductors
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
NCF2952XTT/T0E080J.pdf
- Description:
- IC REMOTE KEYLESS 125KHZ 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,801
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Product details
Overview
NCF2952XTT/T0E080J 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/T0E080J datasheet, NCF2952XTT/T0E080J pinout, NCF2952XTT/T0E080J application, or NCF2952XTT/T0E080J equivalent, key selection considerations include LF sensitivity for inside/outside detection, UHF transmitter co-location support, passive LF backup mode compatibility, and TSSOP38 package integration with RGB LED PWM control.
Technical Context
The NCF2952XTT/T0E080J implements a dedicated 16-bit RISC microcontroller architecture optimized for ultra-low-power operation in automotive key fobs, featuring hardware-accelerated cryptographic processing for AES-128 and legacy 96-bit security protocols used in car access and immobilization.
It integrates a 3-channel active LF frontend (125 kHz) for precise 3D field measurement, plus a separate passive LF channel for immobilizer backup mode, and supports up to 21 I/Os including 8 wake-up inputs, 2 SPI interfaces, and 3-channel PWM for RGB LED indication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Microcontroller Core | 16-bit RISC with hardware crypto acceleration for AES-128 and 96-bit protocols |
| LF Interface | 3-channel active 125 kHz frontend + 1-channel passive LF for immobilizer backup |
| Memory | 2 KB EEPROM, 16 KB EROM + 8 KB ROM, 512-byte RAM |
| I/O Capability | Up to 21 I/O ports, including 8 wake-up/button inputs and 2 SPI interfaces |
| PWM Outputs | 3-channel PWM supporting RGB LED status indication |
| 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 layout and thermal management in battery-powered automotive transponders.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDC / VSS | Core power supply / ground | Provides regulated 3 V digital core domain; requires local decoupling |
| VBAT / VBATA / VSSA | Battery input / analog supply / analog ground | Direct connection to coin cell; enables low-power wake-up and analog sensor operation |
| IN1P/IN1N–IN3P/IN3N | Differential LF antenna inputs | Three independent 125 kHz active LF receiver channels for 3D field vector measurement |
| P10–P34 | General-purpose I/O | Configurable as wake-up inputs, button interfaces, SPI signals, or PWM outputs |
| P15 (XCLK) | External crystal oscillator input | Supports 32.768 kHz crystal for real-time clock and low-power timing |
Key Features
| Feature | Design Value |
|---|---|
| 3-channel active LF frontend | Enables precise 3D localization of vehicle relative to key fob for reliable inside/outside detection |
| Passive LF backup mode | Allows immobilizer authentication even at near-zero battery voltage using energy harvesting from vehicle LF field |
| Multi-mode crypto unit | Hardware-accelerated AES-128 and 96-bit encryption ensures compliance with OEM security requirements |
| RGB LED PWM control | 3-channel PWM output drives color-coded status LEDs without external driver ICs |
| Low-power 16-bit RISC core | Reduces active current to sub-100 µA range during LF listening, extending coin-cell lifetime beyond 3 years |
Applications
| Smart Key Fob | Vehicle Door Handle Module |
|---|---|
Use Scenario: Compact, battery-powered key fob with push-to-start and remote unlock functions. IC Role / Device Role / Timing Role: Primary key-side controller handling LF challenge reception, cryptographic response generation, and UHF transmission. Use Value: Integrated 3-channel LF frontend and AES-128 crypto enable secure, low-latency authentication with <1.5 s door unlock time. | Use Scenario: Embedded module inside door handle housing performing LF field generation and signal analysis. IC Role / Device Role / Timing Role: Vehicle-side LF base station transmitting synchronized 125 kHz challenges and measuring RSSI across three axes. Use Value: High LF sensitivity and 3D field mapping reduce false triggers and improve detection accuracy within ±5 cm positional tolerance. |
| Immobilizer Backup System | Multi-Protocol Access Gateway |
Use Scenario: Fail-safe immobilizer path activated when key battery drops below 2.0 V. IC Role / Device Role / Timing Role: Passive LF transponder emulator responding to vehicle's 125 kHz field without internal power. Use Value: Dedicated passive LF channel enables authentication at battery voltages as low as 0.8 V via energy harvesting. | Use Scenario: Centralized vehicle access controller supporting legacy 96-bit and modern AES-128 keys. IC Role / Device Role / Timing Role: Crypto-agile key management unit executing both protocol stacks in hardware. Use Value: Single-chip support for dual security standards simplifies OEM certification and reduces BOM count by one IC. |
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/T0E080J | Includes integrated 3D security transponder; NCF2952 lacks on-die transponder | Suitable for single-chip key fobs requiring embedded transponder; NCF2952 targets UHF-transmitter-based designs | Select NCF2951 when transponder functionality must be monolithic; choose NCF2952 when external UHF transceiver (e.g., PQJ7980) is preferred |
| PCF7953 | 8-bit microcontroller core, lower memory (1 KB EEPROM, 8 KB ROM), no AES-128 support | Limited to legacy 96-bit-only systems; lacks 3-channel LF and RGB PWM | Use PCF7953 only for cost-sensitive, non-AES platforms where 3D detection is not required |
Compared with NCF2952XTT/T0E080J, NCF2951 offers tighter integration for transponder-centric keys but less flexibility for UHF co-location, while PCF7953 provides legacy compatibility at the expense of security, sensitivity, and feature set-making NCF2952XTT/T0E080J optimal for new AES-128–compliant, high-accuracy keyless go designs.
Availability
NCF2952XTT/T0E080J is available at Aetrix Electronics and suitable for automotive smart key fobs, vehicle door handle modules, immobilizer backup systems, and multi-protocol access gateways requiring stable component supply and long-term lifecycle support.
Supply support for NCF2952XTT/T0E080J 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 headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The ACTIC-4G product line-including NCF2952XTT/T0E080J-is designed specifically for next-generation automotive keyless entry and push-button start systems requiring high LF sensitivity, cryptographic agility, and ultra-low-power operation in space-constrained fobs.
FAQ
What is the primary function of the NCF2952XTT/T0E080J in automotive keyless entry systems?
The NCF2952XTT/T0E080J serves as the core controller in vehicle key fobs, managing LF challenge reception, cryptographic response generation using AES-128 or 96-bit algorithms, and coordination with an external UHF transmitter. Its 3-channel active LF frontend enables precise 3D localization for reliable inside/outside detection, and its low-power 16-bit RISC core extends coin-cell battery life beyond three years in typical usage.
Does the NCF2952XTT/T0E080J support passive LF immobilizer backup mode?
Yes, the NCF2952XTT/T0E080J includes a dedicated passive LF channel that operates without internal power, enabling immobilizer authentication when the key fob battery voltage falls below 1.0 V. This mode uses energy harvested from the vehicle's 125 kHz LF field to power the response circuitry, ensuring fail-safe operation even with depleted batteries.
What memory resources are integrated into the NCF2952XTT/T0E080J?
The NCF2952XTT/T0E080J integrates 2 KB of EEPROM for secure key storage, 16 KB of EROM and 8 KB of ROM for customer application code and firmware, and 512 bytes of RAM for runtime data. This memory configuration supports complex cryptographic routines, multi-protocol stack execution, and robust firmware updates without external memory.
How many I/O pins does the NCF2952XTT/T0E080J provide, and what are their key capabilities?
The NCF2952XTT/T0E080J provides up to 21 configurable I/O ports in its TSSOP38 package, including 8 dedicated wake-up/button inputs, 2 SPI interfaces for peripheral communication, and 3 PWM outputs for RGB LED control. These I/Os support flexible system integration-such as direct button sensing, LED status indication, and sensor interfacing-without requiring additional logic or driver ICs.
Is the NCF2952XTT/T0E080J pin-compatible with earlier NXP keyless entry ICs like the PCF7952?
No, the NCF2952XTT/T0E080J is not pin-compatible with the PCF7952. It uses a TSSOP38 package with different pin assignments, enhanced LF input structure (three differential pairs vs. single-ended), and updated power domains (VBAT/VBATA separation). Migration requires PCB redesign and firmware adaptation to leverage its 16-bit core, AES-128 crypto, and 3-channel LF architecture.
NCF2952XTT/T0E080J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- -
- Frequency:
- 125kHz
- Standards:
- -
- Interface:
- SPI
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-TSSOP
NCF2952XTT/T0E080J FAQ
1.How can I place an order for NCF2952XTT/T0E080J through Aetrix?
Please submit a Request for Quotation (RFQ) for NCF2952XTT/T0E080J 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/T0E080J reliable?
The price and inventory of NCF2952XTT/T0E080J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCF2952XTT/T0E080J is usually 5 days.
3.What payment methods are accepted for NCF2952XTT/T0E080J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCF2952XTT/T0E080J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCF2952XTT/T0E080J?
NCF2952XTT/T0E080J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCF2952XTT/T0E080J 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/T0E080J?
For technical support, including NCF2952XTT/T0E080J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCF2952XTT/T0E080J requirements.
6.How does Aetrix verify that NCF2952XTT/T0E080J is sourced from the original manufacturer or authorized distributors?
All NCF2952XTT/T0E080J 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/T0E080J meets industry standards.
7.What is the process for return or replacement of NCF2952XTT/T0E080J?
All NCF2952XTT/T0E080J units undergo pre-shipment inspection (PSI). If there is an issue with NCF2952XTT/T0E080J, 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/T0E080J part is unused and in its original packaging.
Return procedure for NCF2952XTT/T0E080J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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