NXP Semiconductors MFRC50001T/0FE,112

Overview

MFRC50001T/0FE,112 from NXP Semiconductors is a contactless reader IC for 13.56 MHz ISO/IEC 14443 A and MIFARE Classic (1K/4K) protocols, featuring integrated Crypto1 security engine, 64-byte FIFO buffer, and direct antenna drive capability up to 100 mm operating distance. It supports parallel microprocessor interface with automatic interface detection and operates from 3.3 V or 5 V supplies.

For engineers reviewing the MFRC50001T/0FE,112 datasheet, MFRC50001T/0FE,112 pinout, MFRC50001T/0FE,112 application, or MFRC50001T/0FE,112 equivalent, key selection considerations include ISO/IEC 14443 A compliance, on-chip Crypto1 authentication, transmitter output drive strength, parallel interface flexibility, and EEPROM-based key storage architecture.

Technical Context

The MFRC50001T/0FE,112 implements full ISO/IEC 14443 A Layers 1–4 including framing, parity, CRC-16/CRC-8 generation and checking, and bit-oriented/byte-oriented encoding/decoding. Its analog front-end includes dual-channel (I/Q) demodulation, correlation-based bit decoding, and amplitude rating circuitry optimized for robust transponder response detection.

Digital subsystem integrates a programmable timer, interrupt controller with IRQ pin, 32×16-byte EEPROM for configuration and keys, and a state machine managing command execution (Transceive, Authent1, LoadKeyE2, etc.). Transmitter module drives TX1/TX2 directly at 13.56 MHz without external active components for ≤100 mm proximity operation.

Key Specifications

Pinout & Package

MFRC50001T/0FE,112 is housed in a SO32 (SOT287-1) plastic small outline package with 32 leads and 7.5 mm body width.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar contactless reader IC applications.

Compared with MFRC50001T/0FE,112, MFRC53101T/0FE,118 offers higher receiver sensitivity for marginal field conditions, while CLRC63201T/0FE,112 delivers lower quiescent current and integrated power management-both retain full MIFARE Classic and ISO/IEC 14443 A compatibility but require minor layout adjustments for LDO bypassing or ESD layout rules.

Availability

MFRC50001T/0FE,112 is available at Aetrix Electronics and suitable for electronic payment systems, access control systems, and banking terminals requiring stable component supply and long-term lifecycle support.

Supply support for MFRC50001T/0FE,112 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 consumer applications.

The MFRC500 product line was designed as the foundational MIFARE reader IC family, targeting cost-sensitive, high-volume contactless identification systems requiring full ISO/IEC 14443 A and MIFARE Classic interoperability with minimal external components.

FAQ

What communication interface does the MFRC50001T/0FE,112 support?

The MFRC50001T/0FE,112 supports an 8-bit parallel microprocessor interface with automatic detection of three modes: separated address/data bus with independent read/write strobes, multiplexed address/data bus with address latch enable, and EPP-style common strobe with handshake. It does not support SPI, I²C, or UART interfaces. The interface uses pins NCS, NWR/NRD/ALE/A0–A2/D0–D7 and provides IRQ signaling for efficient command completion notification. This design allows direct connection to legacy 8-bit MCUs without protocol translation firmware.

Does the MFRC50001T/0FE,112 include on-chip cryptographic functionality?

Yes, the MFRC50001T/0FE,112 integrates a dedicated Crypto1 security engine that performs mutual authentication with MIFARE Classic 1K and 4K transponders. It supports loading up to 32 distinct 6-byte keys into its 384-byte EEPROM key storage area using the LoadKeyE2 command. Keys are stored in a specific nibble-inverted format per datasheet Section 9.2.3.1. The engine executes authentication entirely in hardware, eliminating the need for external crypto ICs or software-based implementations that would increase latency and MCU resource usage.

What is the maximum operational read distance supported by the MFRC50001T/0FE,112?

The MFRC50001T/0FE,112 supports a proximity operating distance of up to 100 mm when used with a properly tuned antenna and matching network. This specification assumes optimal conditions: 5 V TVDD supply, standard 13.56 MHz crystal, and compliant MIFARE Classic transponder. Achievable range depends on antenna geometry, PCB layout, power supply stability, and environmental RF noise. The IC's direct TX1/TX2 outputs eliminate external amplification needs within this range, but exceeding 100 mm requires additional RF power stages not supported by the MFRC50001T/0FE,112 itself.

How is antenna matching implemented for the MFRC50001T/0FE,112?

The MFRC50001T/0FE,112 uses TX1 and TX2 outputs to drive a series-resonant antenna circuit tuned to 13.56 MHz. Matching requires external capacitors and resistors to set Q-factor and impedance transformation-typical values are 22 pF–47 pF series capacitors and 1 Ω–10 Ω damping resistors depending on antenna inductance (typically 1–2 µH). The datasheet recommends connecting VMID to a 100 nF capacitor to ground to stabilize internal reference voltage. No transformer or balun is required for single-ended antenna topologies, though differential configurations may use center-tapped antennas with appropriate termination.

Is the MFRC50001T/0FE,112 pin-compatible with other NXP reader ICs?

Yes, the MFRC50001T/0FE,112 is explicitly pin-compatible with the CLRC632, MFRC530, MFRC531, and SLRC400 according to Section 2 of the datasheet. This allows drop-in replacement in existing designs using those parts, provided firmware is updated to match register map differences and feature sets. Pin compatibility covers all 32 SO32 package signals including power, interface, RF, and control pins. However, functional enhancements in newer parts (e.g., CLRC632's integrated LDO) may require minor schematic updates for optimal performance despite mechanical interchangeability.