NXP Semiconductors CLRC66302HN,551

Overview

CLRC66302HN,551 from NXP Semiconductors is a high-performance multi-protocol NFC frontend IC supporting ISO/IEC 14443A/B, FeliCa (JIS X 6319-4), ISO/IEC 15693, ISO/IEC 18092 P2P passive initiator, and EPC Class-1 HF modes. It delivers up to 848 kbit/s transfer speed for MIFARE Classic, integrates 512-byte FIFO, and operates from 3.0 V to 5.5 V supply. It is used in secure access control readers requiring robust contactless card detection and hardware-accelerated MIFARE encryption.

For engineers reviewing the CLRC66302HN,551 datasheet, CLRC66302HN,551 pinout, CLRC66302HN,551 application, or CLRC66302HN,551 equivalent, key selection considerations include its HVQFN32 package with wettable flanks, support for SPI/I²C/UART host interfaces, integrated PLL for 27.12 MHz crystal derivation, low-power card detection capability, and dedicated SAM interface for secure key storage.

Technical Context

The CLRC66302HN,551 implements dual transmitter outputs (TX1/TX2) and differential receiver inputs (RXP/RXN) for optimized 13.56 MHz RF front-end performance. Its analog interface handles ASK modulation and subcarrier load demodulation per ISO/IEC 14443-A, while the digital module manages full framing, CRC, and parity for type A and MIFARE Classic protocols.

It features five programmable timers-including Timer4 as a wake-up timer driven by an internal LFO-and supports flexible host interface selection via IFSEL0/IFSEL1 pins. The device includes a dedicated I²C bus for secure access module (SAM) connection and hardware-accelerated MIFARE Classic encryption in read/write mode.

Key Specifications

Pinout & Package

HVQFN32 package (SOT617-1), 5 × 5 × 0.85 mm body, wettable flanks, MSL1 rating - optimized for automated optical inspection and reliable reflow soldering in high-volume manufacturing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NFC frontend applications.

Compared with CLRC66302HN,551, CLRC66303HNE offers refined low-power card detection and wettable flanks for improved manufacturability, while PN5180A0HN/C1 trades protocol breadth for embedded processing - making CLRC66302HN,551 optimal for cost-sensitive, multi-standard readers needing proven analog performance and minimal host overhead.

Availability

CLRC66302HN,551 is available at Aetrix Electronics and suitable for access control systems, gaming terminals, industrial asset tracking, and EMV-compliant payment terminals requiring stable component supply and long-term lifecycle assurance.

Supply support for CLRC66302HN,551 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The CLRC663 product line delivers high-integration NFC frontends designed for multi-standard contactless readers requiring robust RF performance, hardware crypto acceleration, and flexible host interfacing - targeting secure access, transit, and payment infrastructure.

FAQ

What is the maximum operating distance supported by CLRC66302HN,551 in ISO/IEC 14443A read/write mode?

The CLRC66302HN,551 achieves a typical operating distance of up to 12 cm for ISO/IEC 14443A and MIFARE Classic cards under optimal conditions - including properly tuned 13.56 MHz antennas, sufficient RF power, and low-noise PCB layout. Actual range depends on antenna geometry, matching network efficiency, and environmental RF interference. The CLRC66302HN,551's dual TX outputs and differential RX inputs contribute directly to this performance envelope.

Does CLRC66302HN,551 support hardware-based MIFARE Classic encryption?

Yes, the CLRC66302HN,551 includes on-die hardware acceleration for MIFARE Classic 1K and 4K authentication and cryptographic operations. This offloads the host microcontroller, reduces transaction latency, and enhances security by minimizing exposure of sensitive keys in software memory. The CLRC66302HN,551 handles all cryptographic primitives required for MIFARE Classic's Crypto1 cipher in read/write mode.

Which host interfaces are supported by CLRC66302HN,551 and what are their maximum speeds?

The CLRC66302HN,551 supports SPI (up to 10 Mbit/s), I²C-bus (Fast-mode Plus, up to 1000 kBd), and UART (RS-232 compatible, up to 1228.8 kBd). Voltage levels for UART are dependent on the pin supply voltage. Interface selection is controlled by IFSEL0/IFSEL1 pins at power-on, allowing fixed configuration without runtime reprogramming. All interfaces are fully supported in the CLRC66302HN,551 variant.

Can CLRC66302HN,551 be used with a secure access module (SAM)?

Yes, the CLRC66302HN,551 includes a dedicated I²C interface specifically for connecting a secure access module (SAM). This separate bus isolates SAM communication from the main host interface, enabling secure key storage, cryptographic co-processing, and EMV-compliant transaction signing. The CLRC66302HN,551 supports SAMs such as the NXP SE05x series and is validated for use in certified payment terminals.

What is the power supply requirement for CLRC66302HN,551 and how does it differ from CLRC66303?

The CLRC66302HN,551 requires a 3.0 V to 5.5 V supply across VDD, PVDD, TVDD, AVDD, and DVDD rails - consistent with industrial 3.3 V and 5 V systems. In contrast, the CLRC66303 variant supports a wider 2.5 V to 5.5 V range, enabling compatibility with lower-voltage microcontrollers and battery-operated designs. Both variants share identical functional specifications except for supply range and LPCD register enhancements in CLRC66303.