NXP Semiconductors MF1S5031XDUD2/V1A

Overview

MF1S5031XDUD2/V1 from NXP Semiconductors is a contactless smart card IC compliant with ISO/IEC 14443 Type A, featuring 1 kB EEPROM organized in 16 sectors, 4-byte non-unique ID (NUID), and CRYPTO1-based mutual three-pass authentication. It enables sub-100 ms ticketing transactions in public transport systems and supports value-block operations for electronic purse applications.

For engineers reviewing the MF1S5031XDUD2/V1 datasheet, MF1S5031XDUD2/V1 pinout, MF1S5031XDUD2/V1 application, or MF1S5031XDUD2/V1 equivalent, this page delivers verified technical context, memory access behavior, RF interface timing, UID handling for non-unique deployments, and secure sector-based key management - all specific to the 12-inch wafer FFC bump variant with 4-byte NUID.

Technical Context

The MF1S5031XDUD2/V1 implements a dedicated RF interface per ISO/IEC 14443-3A with 13.56 MHz carrier, integrated voltage regulator, POR, and clock regenerator - requiring no external components beyond the antenna coil. Its digital control unit executes anticollision, three-pass authentication, and encrypted memory operations using the CRYPTO1 stream cipher.

Memory is partitioned into 16 sectors (each with 4 blocks of 16 bytes), where sector trailers store two keys and programmable access bits governing read/write/increment/decrement permissions per block. The 4-byte NUID version returns ATQA = 0004h and SAK = 08h, and does not guarantee UID uniqueness across devices.

Key Specifications

Pinout & Package

MF1S5031XDUD2/V1 is supplied as a bumped die on 12-inch wafer (120 μm thickness, film frame carrier), with Au bumps and no leadframe or molded package. It interfaces exclusively via two RF terminals (LA and LB) connected directly to an external antenna coil - no pins, pads, or solderable terminals are present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MF1S5031XDUD2/V1, the MF1S5001XDUD2/V1 provides deterministic UID uniqueness at the cost of larger identifier storage and slightly higher wafer test overhead, while MF1S5030XDA4/V1 trades die-level flexibility for module-level ease-of-integration and antenna co-design assurance.

Availability

MF1S5031XDUD2/V1 is available at Aetrix Electronics and suitable for public transport ticketing, access management, and electronic toll collection requiring stable component supply across high-volume smart card production programs.

Supply support for MF1S5031XDUD2/V1 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 identification markets, with core expertise in RFID, NFC, and trusted execution environments.

The MF1S5031XDUD2/V1 belongs to the MIFARE Classic EV1 family - designed specifically for cost-sensitive, high-reliability contactless smart card applications demanding proven security, fast transaction throughput, and ISO/IEC 14443 interoperability.

FAQ

What is the UID configuration of MF1S5031XDUD2/V1?

The MF1S5031XDUD2/V1 is configured with a 4-byte Non-Unique ID (NUID), meaning the identifier is not guaranteed to be globally unique across devices. This version returns ATQA = 0004h and is intended for applications where UID collision handling is managed at the system level - such as closed-loop transit systems with local database reconciliation. Unlike the 7-byte UID variants, NUID reduces wafer test complexity and cost.

Does MF1S5031XDUD2/V1 support value-block operations like increment and decrement?

Yes, MF1S5031XDUD2/V1 fully supports value-block operations including increment, decrement, restore, and transfer - provided the target block is configured as a value block (via sector trailer access bits) and authenticated with the correct key. These operations use a triple-stored value format with built-in backup management, enabling atomic balance updates essential for electronic purse and toll applications.

How is MF1S5031XDUD2/V1 powered and interfaced?

MF1S5031XDUD2/V1 is a passive contactless IC powered entirely by electromagnetic induction from a 13.56 MHz reader field. It interfaces solely through two RF terminals - LA and LB - which connect directly to an external antenna coil. No external power supply, capacitors, resistors, or active components are required; the chip integrates voltage regulation, POR, and RF demodulation internally.

What memory organization does MF1S5031XDUD2/V1 use?

MF1S5031XDUD2/V1 contains 1 kB of EEPROM organized into 16 sectors, each containing 4 blocks of 16 bytes. Sector 0 includes a manufacturer block (block 0), two data blocks, and a sector trailer; sectors 1–15 contain three data blocks and a trailer. Each sector trailer holds two secret keys (A and B) and access condition bits controlling per-block permissions for read, write, and value operations.

Is MF1S5031XDUD2/V1 compatible with standard ISO/IEC 14443 Type A readers?

Yes, MF1S5031XDUD2/V1 is fully compliant with ISO/IEC 14443 Type A Parts 1–4, including the REQA/WUPA activation sequence, anticollision protocol (cascade level 1), and Halt command. It responds with ATQA = 0004h and SAK = 08h, ensuring interoperability with certified PCDs used in transit gates, access panels, and payment terminals without firmware modification.