NXP Semiconductors NCF2960XHN/T0B04AJ

Overview

NCF2960XHN/T0B04AJ from NXP Semiconductors is a single-chip remote keyless entry (RKE) and transponder combo IC integrating a 16-bit RISC microcontroller, on-chip UHF transmitter (315/434/868/915 MHz), HT3/AES-128 calculation unit, 16 KB user EROM, and 2 KB ultra-low-power EEPROM. It operates from a single lithium cell (2.1–3.6 V) and supports combo-key applications combining RKE with vehicle immobilization.

For engineers reviewing the NCF2960XHN/T0B04AJ datasheet, NCF2960XHN/T0B04AJ pinout, NCF2960XHN/T0B04AJ application, or NCF2960XHN/T0B04AJ equivalent, key selection considerations include UHF band support, transponder emulation compatibility (HT3/HT-AES/HT-Pro2), fractional-N PLL for crystal tolerance compensation, HVQFN24 wettable flanks package, and integrated temperature sensor for battery management.

Technical Context

The NCF2960XHN/T0B04AJ implements NXP's third-generation Micro RISC Kernel (MRK III) with single-cycle instruction execution and Harvard architecture. Its on-chip UHF transmitter uses a fractional-N PLL referenced to a 27.6 MHz crystal and supports multi-channel frequency hopping across 315/434/868/915 MHz bands for jamming resilience.

Transponder functionality operates independently from the battery via LF field coupling, while the RKE path uses the integrated UHF transmitter and built-in calculation unit for HT3 (96-bit) or AES-128 cryptographic operations. The device includes dedicated I/O with current source for direct LED drive and eight wake-up-capable command button inputs.

Key Specifications

Pinout & Package

HVQFN24 (4 × 4 mm) package with wettable flanks - optimized for compact automotive key fobs and optical solder joint inspection without X-ray.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar remote keyless entry and transponder combo applications.

Compared with NCF2960XHN/T0B04AJ, the NCF29A1XHN/T0B04AJ offers expanded band concurrency and faster crypto throughput but increases power consumption by 18%; the SLB9670VQ20 provides stronger attestation features but requires external RF and LF front-ends, increasing total solution size by 3.2×.

Availability

NCF2960XHN/T0B04AJ is available at Aetrix Electronics and suitable for automotive key fobs, RKE-immobilizer combo modules, and ultra-compact wireless access devices requiring stable component supply and long-term lifecycle support.

Supply support for NCF2960XHN/T0B04AJ 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 NCF2960XHN/T0B04AJ belongs to NXP's Combo-Key product line, engineered specifically to integrate RKE and transponder functions into a single die for space-constrained automotive key fobs with stringent security and battery-life requirements.

FAQ

What is the primary function of the NCF2960XHN/T0B04AJ in automotive key systems?

The NCF2960XHN/T0B04AJ serves as a dual-function security IC that simultaneously handles remote keyless entry (UHF transmission) and passive immobilizer transponder emulation (LF reception). Its integrated 16-bit RISC core, hardwired HT3/AES engines, and on-chip UHF transmitter enable both functions to operate from a single lithium cell without external RF or crypto components-making it the central silicon element in modern combo-key fobs.

Does the NCF2960XHN/T0B04AJ support frequency hopping, and how is it implemented?

Yes, the NCF2960XHN/T0B04AJ supports frequency hopping across its 315/434/868/915 MHz UHF bands using an on-chip fractional-N PLL referenced to a 27.6 MHz crystal and an internal pseudo-random number generator. This implementation allows dynamic channel selection per transmission, ensuring reliable operation in RF-jammed environments without requiring external frequency synthesizers or controller intervention.

Can the NCF2960XHN/T0B04AJ operate when the battery voltage drops below 2.5 V?

Yes, the NCF2960XHN/T0B04AJ maintains full functionality down to 2.1 V, including UHF transmission, cryptographic computation, and transponder emulation. Its ultra-low-power design and 2 KB EEPROM with retention down to 1.8 V ensure secure counter updates and rolling code integrity even during deep battery discharge-critical for maintaining vehicle access reliability near end-of-life.

What development tools are supported for firmware programming of the NCF2960XHN/T0B04AJ?

The NCF2960XHN/T0B04AJ supports C-compiler-based development using NXP's S32DS IDE and compatible toolchains. Its 16 KB Flash-like EROM enables in-circuit debugging and programming via SWD interface, and the included ROM library provides pre-validated HT3 and AES-128 routines-reducing firmware validation effort and accelerating time-to-certification for automotive security applications.

Is the HVQFN24 package of the NCF2960XHN/T0B04AJ compatible with standard reflow profiles?

Yes, the HVQFN24 (4 × 4 mm) package with wettable flanks is qualified for standard lead-free reflow profiles (J-STD-020 Class 3). Its wettable flanks enable automated optical inspection (AOI) of solder joints without X-ray, and the package's thermal pad design ensures adequate heat dissipation during UHF transmission bursts-meeting IPC-A-610 acceptance criteria for automotive-grade assembly.