NXP Semiconductors NT3H2211W0FT1X

Overview

NT3H2211W0FT1X from NXP Semiconductors is a second-generation connected NFC tag IC integrating ISO/IEC 14443A-compliant passive NFC interface and I2C slave interface, with 2 kbytes EEPROM, 64-byte SRAM, and energy harvesting output (VOUT) delivering up to 15 mW - enabling tap-and-go configuration and power delivery in home-automation nodes and consumer electronics.

For engineers reviewing the NT3H2211W0FT1X datasheet, NT3H2211W0FT1X pinout, NT3H2211W0FT1X application, or NT3H2211W0FT1X equivalent, key selection considerations include NFC/I2C dual-interface memory arbitration, ECC-based originality signature for anti-cloning, password-protected memory access (32-bit), field-detection (FD) pin for event synchronization, and SO8 package compatibility with legacy PCB layouts.

Technical Context

The NT3H2211W0FT1X implements a dual-interface architecture where NFC and I2C share access to a unified memory map via an internal arbiter, supporting both pass-through and mirror modes. Its digital control unit executes ISO/IEC 14443-3 Type A state machine (IDLE → READY1 → READY2 → ACTIVE → AUTHENTICATED) and interprets standard NFC commands including FAST_READ/FAST_WRITE (64-byte SRAM transfer in 6.1 ms) and GET_VERSION.

Power management integrates energy harvesting from the NFC field into VOUT (capable of powering external microcontrollers), while the FD pin provides open-drain event signaling synchronized to NFC field presence. Memory access is secured via 32-bit password protection per interface, ECC-based originality signature, and configurable lock bits for EEPROM pages and SRAM regions.

Key Specifications

Pinout & Package

NT3H2211W0FT1X is housed in an SO8 package (SOT96-1), with 8 leads, body width 3.9 mm, and standard gull-wing lead form factor compatible with automated SMT assembly and legacy board footprints.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar connected NFC tag applications.

Compared with NT3H2211W0FT1X, NT3H2111W0FT1X offers identical interface performance and security in a lower-density memory variant, while NT3H2211W0FTTJ delivers identical functionality in a narrower TSSOP8 footprint - enabling design flexibility without compromising NFC/I2C interoperability or energy harvesting capability.

Availability

NT3H2211W0FT1X is available at Aetrix Electronics and suitable for smart home sensors, consumer audio accessories, fitness equipment, and electronic shelf labels requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for NT3H2211W0FT1X 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 focused on secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in NFC, RFID, and secure element technologies.

The NTAG I2C plus product line was designed specifically to enable low-cost, dual-interface NFC integration in resource-constrained embedded systems - combining contactless convenience with wired reliability and energy autonomy.

FAQ

What is the primary function of the FD pin on the NT3H2211W0FT1X?

The FD (Field Detection) pin on the NT3H2211W0FT1X is an open-drain output that asserts low when an NFC field is detected. It enables host MCU wake-up without continuous polling, synchronizes pass-through data transfers between NFC and I2C interfaces, and supports low-power system architectures - a core enabler of zero-power configuration in battery-free devices.

Does the NT3H2211W0FT1X require an external power supply to operate its NFC interface?

No - the NFC interface of the NT3H2211W0FT1X operates entirely passively, powered by energy harvested from the reader's RF field. However, VCC must be supplied (1.8–5.5 V) to enable I2C communication, SRAM access, and VOUT regulation. Without VCC, only basic NFC read/write to EEPROM is functional.

How does memory arbitration work between NFC and I2C on the NT3H2211W0FT1X?

The NT3H2211W0FT1X uses a hardware-based arbiter to manage concurrent NFC and I2C memory access. It prevents bus contention by granting exclusive access per transaction, enforcing priority rules (e.g., NFC commands interrupt ongoing I2C transfers), and maintaining consistent memory state - ensuring deterministic behavior even under mixed-interface load.

Can the NT3H2211W0FT1X be used as a standalone I2C EEPROM without NFC functionality?

Yes - the NT3H2211W0FT1X functions fully as a standard I2C EEPROM (2 kbytes) and I2C SRAM (64 bytes) when VCC is applied, regardless of NFC field presence. Its I2C slave interface supports standard read/write protocols at up to 400 kHz, and all memory protection features (password, locks) remain active and configurable via I2C.

What security mechanisms protect against cloning of the NT3H2211W0FT1X?

The NT3H2211W0FT1X incorporates ECC-based originality signature generation, factory-programmed unique 7-byte UID, one-time programmable capability container bits, and per-page dynamic/static lock bits. These features collectively prevent bit-for-bit cloning and enable cryptographic verification of genuine NXP silicon in authentication-sensitive deployments.