NXP Semiconductors NT3H1201W0FTTJ

Overview

NT3H1201W0FTTJ from NXP Semiconductors is an NFC Forum Type 2 Tag IC with integrated I²C interface, 2 kB EEPROM user memory, 64-byte SRAM buffer, energy harvesting output (VOUT), and configurable field detection (FD) pin. It operates at 13.56 MHz, supports 106 kbit/s RF data transfer, and enables bidirectional fast pass-through mode between RF and I²C interfaces for zero-power configuration in smart appliances.

For engineers reviewing the NT3H1201W0FTTJ datasheet, NT3H1201W0FTTJ pinout, NT3H1201W0FTTJ application, or NT3H1201W0FTTJ equivalent, this page delivers verified technical context, real-world use cases, validated alternatives, and supply-ready procurement details - all grounded in NXP's official Rev. 3.3 product data sheet.

Technical Context

The NT3H1201W0FTTJ implements a dual-interface architecture: ISO/IEC 14443-3A-compliant passive RF interface coexists with an I²C slave interface supporting Standard (100 kHz) and Fast (400 kHz) modes. Its arbitration logic enforces first-come-first-served access to shared EEPROM/SRAM resources, with status flags indicating interface busy states.

Energy harvesting via VOUT supplies up to 3.3 V to external low-power devices (e.g., microcontrollers), while the open-drain FD pin triggers on RF field presence, first communication start, or tag selection - enabling wake-up and event-driven system control without host polling.

Key Specifications

Pinout & Package

TSSOP8 package (SOT505-1): plastic thin shrink small outline, 8 leads, body width 3 mm, 2 kB memory, 50 pF input capacitance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NFC+I²C dual-interface applications.

Compared with NT3H1201W0FTTJ, NT3H1101W0FTT reduces memory capacity without altering footprint or interface timing, while ST25DV02K-IER adds configurability at the cost of increased software complexity and different register mapping - making NT3H1201W0FTTJ optimal for cost-sensitive, fixed-configuration NFC/I²C bridges.

Availability

NT3H1201W0FTTJ is available at Aetrix Electronics and suitable for smart home appliances, healthcare wearables, and industrial printers requiring stable component supply, long-term lifecycle support, and NFC-based field provisioning.

Supply support for NT3H1201W0FTTJ 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 leader in secure connectivity solutions, specializing in RFID, NFC, automotive, and industrial MCUs with emphasis on security, reliability, and low-power design.

The NTAG I²C product line targets cost-sensitive, battery-free or energy-harvesting IoT edge nodes - delivering NFC-based configuration, diagnostics, and firmware update capabilities through standardized dual interfaces.

FAQ

What is the memory capacity of NT3H1201W0FTTJ?

The NT3H1201W0FTTJ provides 1904 bytes of user-accessible EEPROM memory (476 pages × 4 bytes) plus 64 bytes of volatile SRAM. The EEPROM supports 500,000 write cycles and 20-year data retention, while the SRAM offers unlimited endurance for frequently updated data such as NDEF message buffers or session registers. This configuration is confirmed in NXP's Rev. 3.3 datasheet Section 2.3 and Table 5.

Does NT3H1201W0FTTJ support energy harvesting?

Yes, NT3H1201W0FTTJ integrates energy harvesting circuitry that delivers regulated voltage via the VOUT pin - up to 3.3 V - sufficient to power external low-power microcontrollers or sensors during RF field presence. This feature eliminates the need for a separate power supply in NFC-triggered applications and is documented in Section 2.1 and Figure 1 of the official datasheet.

How does the field detection (FD) pin function on NT3H1201W0FTTJ?

The FD pin on NT3H1201W0FTTJ is a configurable open-drain output that asserts low upon programmable RF events: RF field presence, first communication start, or tag selection only. It enables wake-up of external hosts without polling and is detailed in Section 2.1 and Table 3 of the datasheet. Configuration is performed via I²C or RF commands, and the pin remains functional even when VCC is unpowered.

Can NT3H1201W0FTTJ operate without external VCC?

NT3H1201W0FTTJ operates in passive RF mode without VCC for basic NFC tag functions (e.g., reading NDEF messages), but VCC is required to enable I²C communication, SRAM access, Pass-through mode, and energy harvesting output (VOUT). The datasheet explicitly states in Section 8.3.4 that "The SRAM is only available if the tag is powered via the VCC pin" - confirming VCC dependency for full dual-interface functionality.

What is the purpose of the SRAM Pass-through mode in NT3H1201W0FTTJ?

The SRAM Pass-through mode in NT3H1201W0FTTJ maps the 64-byte SRAM into the RF memory space (fixed address 240–255), enabling direct RF read/write access without EEPROM endurance limitations. This allows rapid synchronization of dynamic data (e.g., sensor logs or firmware patches) between NFC readers and I²C-connected hosts - a capability verified in Sections 2.1, 8.3.4, and 11.2 of the official datasheet.