NXP Semiconductors MF1S7031XDUD2/V1A

Overview

MF1S7031XDUD2/V1 from NXP Semiconductors is a contactless smart card IC compliant with ISO/IEC 14443 Type A, featuring 4 kB EEPROM organized in 40 sectors (32×4-block + 8×16-block), 13.56 MHz operating frequency, 106 kbit/s data rate, and 4-byte non-unique ID (NUID) for public transport ticketing and access control systems.

For engineers reviewing the MF1S7031XDUD2/V1 datasheet, MF1S7031XDUD2/V1 pinout, MF1S7031XDUD2/V1 application, or MF1S7031XDUD2/V1 equivalent, key selection considerations include NUID vs UID identity model, sector-based cryptographic access control using CRYPTO1, <100 ms typical transaction time, and antenna-coupled power/data interface requiring no external components.

Technical Context

The MF1S7031XDUD2/V1 implements a fully integrated RF interface per ISO/IEC 14443A, including rectifier, voltage regulator, clock regenerator, and Power-On Reset - enabling passive operation from reader field only. Its digital control unit executes anticollision (cascade-level handling for NUID), three-pass mutual authentication, and encrypted command-response sequences after key validation.

Memory access is enforced through sector-level access bits stored in trailer blocks, supporting read/write, value-block operations (increment/decrement/transfer), and strict key-A/key-B permission hierarchies. The CRYPTO1 stream cipher secures all authenticated transactions, while 16-bit CRC, parity, bit coding, and bit counting ensure data integrity across the air interface.

Key Specifications

Pinout & Package

MF1S7031XDUD2/V1 is supplied as a bumped die on 12-inch wafer (120 μm thickness, film frame carrier, Au bumps), intended for embedding into contactless modules (e.g., MOA4/MOA8) or custom antenna substrates. It has no conventional package pins; electrical connection is made exclusively via two RF terminals: LA and LB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MF1S7031XDUD2/V1, the MF1S7001XDUD2/V1 provides guaranteed UID uniqueness at the cost of higher anticollision overhead, while MF1S7030XDA4/V1 trades wafer-level flexibility for turnkey module integration - making MF1S7031XDUD2/V1 optimal for high-volume, antenna-optimized smart card manufacturing.

Availability

MF1S7031XDUD2/V1 is available at Aetrix Electronics and suitable for public transportation ticketing, physical access control, and electronic toll collection requiring stable component supply across long-lifecycle deployments.

Supply support for MF1S7031XDUD2/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 IoT applications.

The MIFARE Classic EV1 product line delivers mainstream contactless smart card ICs optimized for cost-sensitive, high-volume applications like transit and access - balancing security, interoperability, and ease of integration.

FAQ

What is the memory organization of the MF1S7031XDUD2/V1?

The MF1S7031XDUD2/V1 contains 4096 bytes of EEPROM organized into 40 sectors: 32 sectors with 4 blocks each and 8 sectors with 16 blocks each. Each block holds 16 bytes. Sector trailers store keys and access conditions, while data blocks support read/write or value operations. The MF1S7031XDUD2/V1 uses this structure to enable multi-application isolation and secure credential storage.

Does the MF1S7031XDUD2/V1 support mutual authentication?

Yes, the MF1S7031XDUD2/V1 implements mutual three-pass authentication per ISO/IEC DIS 9798-2 using the CRYPTO1 stream cipher. Authentication occurs per sector using individually programmable keys A and B stored in sector trailers. This ensures that only authorized readers can access protected memory areas, and the MF1S7031XDUD2/V1 validates reader credentials before permitting any operation.

What is the difference between the 4-byte NUID and 7-byte UID versions of the MF1S7031XDUD2/V1?

The MF1S7031XDUD2/V1 uses a 4-byte Non-Unique ID, meaning identifiers are not guaranteed globally unique and require system-level collision resolution. In contrast, 7-byte UID variants (e.g., MF1S7001XDUD2/V1) provide factory-programmed unique identifiers. Both share identical EEPROM, crypto, and timing specs, but NUID reduces cost and simplifies mass issuance where backend tracking handles uniqueness.

Can the MF1S7031XDUD2/V1 operate without an external power source?

Yes, the MF1S7031XDUD2/V1 is a fully passive device powered solely by the 13.56 MHz RF field from a compatible reader. Its integrated voltage regulator and rectifier convert induced AC energy into stable DC supply for the digital logic and EEPROM. No battery or external power circuitry is required - the MF1S7031XDUD2/V1 functions entirely through inductive coupling via LA and LB antenna terminals.

What packaging form is supplied for the MF1S7031XDUD2/V1?

The MF1S7031XDUD2/V1 is supplied as a bumped die on 12-inch silicon wafer (120 μm thickness, film frame carrier, Au bumps), not as a pre-packaged IC. It is intended for integration into contactless modules (e.g., MOA4/MOA8) or direct lamination onto custom antenna substrates. This wafer format enables high-volume, low-cost smart card manufacturing with optimized antenna coupling.