NXP Semiconductors NT3H2111W0FHKH

Overview

NT3H2111W0FHKH from NXP Semiconductors is a second-generation connected NFC tag integrating ISO/IEC 14443A-compliant passive NFC and I2C slave interfaces, 1 kbyte EEPROM, 64-byte SRAM buffer, and energy harvesting (up to 15 mW). It enables tap-and-go configuration and secure data exchange in home-automation nodes and consumer electronics with password-protected memory access and ECC-based originality signature.

For engineers reviewing the NT3H2111W0FHKH datasheet, NT3H2111W0FHKH pinout, NT3H2111W0FHKH application, or NT3H2111W0FHKH equivalent, key selection considerations include NFC/I2C dual-interface arbitration, field-detection–driven wake-up synchronization, 400 kHz I2C timing compliance, UID-based authentication, and XQFN8 package constraints for space-constrained embedded designs.

Technical Context

The NT3H2111W0FHKH implements a dual-interface architecture where NFC and I2C share access to a unified memory map via hardware arbitration, supporting both pass-through and mirror modes. Its digital control unit handles ISO/IEC 14443-3A anticollision, command interpretation, and state management across IDLE, READY, ACTIVE, AUTHENTICATED, and HALT states.

Power management integrates energy harvesting from the NFC RF field into VOUT (capable of powering external circuitry), configurable FD pin output for event detection and host wake-up, and fail-safe I2C operation with 7-bit slave address (AAh write / ABh read). Memory access permissions are enforced per interface using 32-bit password protection and dynamic lock bits.

Key Specifications

Pinout & Package

NT3H2111W0FHKH uses the XQFN8 package (SOT902-3): plastic, extremely thin quad flat, no leads, 1.6 × 1.6 × 0.5 mm body, 8 terminals, center pad not soldered.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NT3H2211W0FHKH, NT3H2111W0FHKH reduces memory cost and simplifies firmware partitioning for compact configurations; versus NT3H1101W0FHKH, it adds essential production-grade features - energy harvesting, FD-driven wake-up, and ECC authentication - without increasing package size or pin count.

Availability

NT3H2111W0FHKH is available at Aetrix Electronics and suitable for IoT node deployment, consumer audio accessory integration, and smart meter configuration requiring stable component supply across industrial temperature ranges and multi-year production cycles.

Supply support for NT3H2111W0FHKH 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 consumer markets, with deep expertise in NFC, RFID, and embedded security IP.

The NTAG I2C plus product line was designed to extend NFC beyond simple data exchange into intelligent, powered, and authenticated system-level interaction - targeting resource-constrained embedded devices needing zero-power configuration and host-side power augmentation.

FAQ

What is the memory capacity of NT3H2111W0FHKH?

NT3H2111W0FHKH contains 1 kbyte (1024 bytes) of EEPROM for non-volatile storage and 64 bytes of volatile SRAM accessible only when VCC is applied. The EEPROM supports 500,000 write cycles and guarantees 20-year data retention. SRAM offers unlimited write endurance and is used for high-frequency data buffering between NFC and I2C interfaces.

Does NT3H2111W0FHKH support energy harvesting, and what is its output capability?

Yes, NT3H2111W0FHKH supports energy harvesting from the NFC RF field via its VOUT pin, delivering up to 15 mW of regulated DC power (typically 2.8–3.3 V). This output can directly power low-current peripherals such as microcontrollers, sensors, or real-time clocks, eliminating the need for a separate battery or power rail in NFC-initiated operations.

How does the field detection (FD) pin function in NT3H2111W0FHKH?

The FD pin on NT3H2111W0FHKH is an open-drain output that asserts high when an NFC field is detected. It enables precise host MCU wake-up and synchronizes pass-through data transfers between NFC and I2C interfaces. Its behavior is configurable via internal registers, allowing edge-triggered or level-sensitive signaling depending on system timing requirements.

Is NT3H2111W0FHKH pin-compatible with other NTAG I2C plus variants?

Yes, NT3H2111W0FHKH in XQFN8 (SOT902-3) is pin-compatible with NT3H2211W0FHKH and shares identical pinout, electrical characteristics, and package dimensions. It is also backward compatible with first-generation NTAG I2C devices at the interface level, though features like energy harvesting and ECC signature require updated firmware and host driver support.

What security mechanisms does NT3H2111W0FHKH provide for memory access?

NT3H2111W0FHKH provides layered security: 32-bit password protection for NFC and I2C interfaces (configurable per memory region), ECC-based originality signature for anti-cloning, NFC silence mode to disable contactless interface, and programmable lock bits for permanent page-level write protection. All security features operate independently per interface and are enforced in hardware.