NXP Semiconductors MF1S5031XDUF/V1V

Overview

MF1S5031XDUF/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), 13.56 MHz operating frequency, and Crypto1-based mutual three-pass authentication. It enables sub-100 ms ticketing transactions in public transport systems.

For engineers reviewing the MF1S5031XDUF/V1 datasheet, MF1S5031XDUF/V1 pinout, MF1S5031XDUF/V1 application, or MF1S5031XDUF/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 4-byte NUID bump die variant on 8-inch wafer with 75 μm thickness.

Technical Context

The MF1S5031XDUF/V1 implements a fully integrated RF interface per ISO/IEC 14443A, including rectifier, voltage regulator, clock regenerator, and Power-On Reset - requiring no external components beyond the antenna coil. Its digital control unit executes anticollision, sector-selective 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 - necessitating application-layer collision handling during selection.

Key Specifications

Pinout & Package

MF1S5031XDUF/V1 is supplied as a bumped die on 8-inch wafer (75 μm thickness), mounted on film frame carrier. It has no leadframe or molded package - only two RF terminals: LA and LB for direct connection to an external antenna coil.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MF1S5031XDUF/V1, the 7-byte UID variant offers deterministic anticollision at the cost of longer selection latency, while the MOA4 module trades die-level integration flexibility for simplified assembly - neither is pin-compatible due to differing form factors (bare die vs. packaged module).

Availability

MF1S5031XDUF/V1 is available at Aetrix Electronics and suitable for public transportation ticketing, access management, and electronic toll collection requiring stable component supply across multi-year deployment cycles.

Supply support for MF1S5031XDUF/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 MF1S5031XDUF/V1 belongs to the MIFARE Classic EV1 family - designed specifically for cost-sensitive, high-volume contactless smart card applications demanding proven security, interoperability with legacy infrastructure, and seamless integration into ISO/IEC 14443A ecosystems.

FAQ

What is the UID type and uniqueness guarantee for MF1S5031XDUF/V1?

The MF1S5031XDUF/V1 features a 4-byte non-unique ID (NUID), meaning the identifier is not guaranteed to be globally unique. It returns ATQA = 0004h during anticollision and requires application-layer handling of potential duplicates. This differs from the 7-byte UID variants (e.g., MF1S5001XDUF/V1), which provide manufacturer-assigned uniqueness. MF1S5031XDUF/V1 is intended for deployments where cost and simplicity outweigh absolute UID uniqueness.

How does MF1S5031XDUF/V1 handle memory access security?

MF1S5031XDUF/V1 enforces memory access through sector-based authentication: each of its 16 sectors has two programmable keys (A and B) and access bits stored in the sector trailer. Before reading or writing any block, the host must authenticate using the correct key for that sector. Access bits define granular permissions - e.g., "read/write with Key A only" or "increment/decrement with Key B" - enabling multi-application isolation on a single IC.

What antenna interface requirements apply to MF1S5031XDUF/V1?

MF1S5031XDUF/V1 interfaces directly to an external antenna coil via LA and LB terminals - no external capacitors or matching components are needed. Its input capacitance is 16.9 pF typical, forming a resonant LC tank with the antenna inductance. Antenna design must target 13.56 MHz resonance; recommended geometry follows ISO/IEC 14443A guidelines, with typical loop inductance between 1.0–1.5 μH for optimal coupling and operating distance up to 100 mm.

Can MF1S5031XDUF/V1 support electronic purse functionality?

Yes, MF1S5031XDUF/V1 natively supports electronic purse operations via value blocks. Each value block stores a signed 4-byte value three times (twice non-inverted, once inverted) plus a 1-byte address stored four times - enabling hardware-verified increment, decrement, restore, and transfer commands. These operations execute atomically with built-in backup management, preventing corruption during unexpected power loss - essential for fare deduction or micro-payment use cases.

What is the expected transaction time for a full fare deduction using MF1S5031XDUF/V1?

A complete fare deduction transaction using MF1S5031XDUF/V1 - including anticollision, card selection, three-pass authentication, value block decrement, and transfer - typically completes in less than 100 ms. This includes ~2.5 ms for anticollision (with 4-byte NUID), ~2 ms for authentication, ~2.5 ms for decrement, and ~4.5 ms for transfer, plus overhead for CRC and framing. Real-world performance remains consistent across temperature and field strength due to on-die voltage regulation and adaptive demodulation.