NXP Semiconductors MF1P2231DUD/00Z

Overview

MF1P2231DUD/00Z from NXP Semiconductors is a contactless smart card IC compliant with ISO/IEC 14443-4 and ISO/IEC 7816-4 (SL3), featuring 2 kB non-volatile memory, 4-byte NUID, 17 pF input capacitance, AES-128 cryptography, and Common Criteria EAL5+ security certification. It serves as a secure authentication platform for transit cards, access tokens, and electronic vouchers requiring backward compatibility with MIFARE Classic EV1 infrastructure.

For engineers reviewing the MF1P2231DUD/00Z datasheet, MF1P2231DUD/00Z pinout, MF1P2231DUD/00Z application, or MF1P2231DUD/00Z equivalent, key selection considerations include SL3 security level support, sector-wise security upgrade capability, Transaction MAC/TIMER features, NUID-based privacy compliance, and SOT500-2 wafer-level packaging for embedded module integration.

Technical Context

The MF1P2231DUD/00Z implements a dual-protocol architecture supporting both ISO/IEC 14443-3 (for MIFARE Classic EV1 backward compatibility) and ISO/IEC 14443-4 (T=CL) for SL3 operations. Its memory is organized into 32 sectors of 4 blocks each (2 kB total), with sector trailers containing CRYPTO1 keys A/B and access bytes governing DaVaBlock permissions.

Security level switching operates at card or sector granularity: SL0 enables personalization, SL1 adds optional AES authentication and update restrictions for Data/Value Blocks, and SL3 mandates AES-128 for all commands with encrypted communication, Transaction MAC, and anti-tearing protection for AES key updates and sector trailer writes.

Key Specifications

Pinout & Package

SOT500-2 package: 12-inch wafer form (sawn, 120 µm thickness), intended for embedding into plastic modules, key fobs, or wristbands. No leadframe or solderable terminals - LA/LB connections are bond pads for antenna coil attachment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MF1P2201DUD/00, MF1P2231DUD/00Z provides stronger privacy via NUID+Random ID but sacrifices global UID uniqueness; compared with MF1PH2231DUD/00, it delivers better compatibility with legacy reader antenna designs at the expense of reduced suitability for miniaturized wearables.

Availability

MF1P2231DUD/00Z is available at Aetrix Electronics and suitable for public transportation fare collection, secure physical access control, and event ticketing systems requiring stable component supply, long-term lifecycle assurance, and certified security compliance.

Supply support for MF1P2231DUD/00Z 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 IoT applications, with leadership in contactless IC technology since the introduction of MIFARE.

The MF1P2231DUD/00Z belongs to the MIFARE Plus EV2 product line, designed specifically to enable secure, standards-based, and infrastructure-compatible migration from MIFARE Classic to AES-level security in mass-transit, access, and payment ecosystems.

FAQ

What security certifications does the MF1P2231DUD/00Z hold?

The MF1P2231DUD/00Z holds Common Criteria EAL5+ certification (AVA_VAN.5), validating resistance against high-potential attackers. This certification level matches requirements for banking-grade and electronic passport ICs. The MF1P2231DUD/00Z achieves this through hardware-enforced AES-128, anti-tearing memory writes, ECC-based originality signature, and tamper-resistant voltage/rail/light/glitch sensors integrated into its silicon die.

Does the MF1P2231DUD/00Z support backward compatibility with MIFARE Classic readers?

Yes, the MF1P2231DUD/00Z supports full MIFARE Classic EV1 backward compatibility in SL1 mode, operating on the same ISO/IEC 14443-3 protocol layer and command set. It allows legacy readers to authenticate and access sectors configured in SL1 without firmware updates, while enabling new readers to leverage SL3 AES-128 security on the same physical card - a key requirement for phased infrastructure upgrades.

What is the difference between the 4-byte NUID and 7-byte UID versions of the MF1P2231DUD/00Z?

The MF1P2231DUD/00Z uses a 4-byte NUID (non-unique identifier), which is write-locked at production and supports Random ID for privacy-preserving sessions. In contrast, the 7-byte UID version (e.g., MF1P2201DUD/00) provides globally unique serial numbers but cannot enable Random ID. The NUID variant is mandated for GDPR-compliant applications where persistent UID tracking must be avoided across touchpoints.

Can the MF1P2231DUD/00Z be used in wearable form factors like wristbands?

The MF1P2231DUD/00Z has 17 pF input capacitance, optimized for standard Class 1 smart card antennas. For wristbands or key fobs with smaller coils, NXP offers the MF1PH2231DUD/00 variant with 70 pF input capacitance. Using MF1P2231DUD/00Z in wearables may result in reduced read range or inconsistent coupling unless the antenna is specifically retuned to match the lower capacitance - verify field strength and modulation depth per ISO/IEC 10373-6.

How does the Transaction Timer feature enhance security in the MF1P2231DUD/00Z?

The Transaction Timer in the MF1P2231DUD/00Z limits the maximum allowable duration of a single contactless transaction, mitigating Man-in-the-Middle (MitM) relay attacks. When enabled, the timer starts upon command reception and aborts the transaction if no valid response is generated within the configured window - preventing attackers from extending communication latency to intercept or manipulate data. This feature is configurable per application and enforced in both SL1 and SL3 modes.