STMicroelectronics ST25DV64KC-JF6D3

Overview

ST25DV64KC-JF6D3 from STMicroelectronics is a dynamic NFC/RFID tag IC with 64-Kbit EEPROM, dual I²C and ISO/IEC 15693 contactless interfaces, 1 MHz I²C support, 1.8–5.5 V supply, and NFC Forum Type 5 certification. It enables secure, fast bidirectional data exchange between wired microcontrollers and NFC readers in smart labels, asset trackers, and industrial IoT nodes.

For engineers reviewing the ST25DV64KC-JF6D3 datasheet, ST25DV64KC-JF6D3 pinout, ST25DV64KC-JF6D3 application, or ST25DV64KC-JF6D3 equivalent, key selection factors include RF/I²C fast transfer mode (256-byte buffer), configurable password-protected memory areas, energy harvesting output (V_EH), and GPO interrupt event mapping for field detection and write completion.

Technical Context

The device integrates two independent data paths: an I²C interface addressing memory byte-wise (8192 bytes) and an RF interface addressing memory block-wise (2048 × 4-byte blocks), both accessing the same EEPROM array. Memory is partitioned into four user-configurable areas, each protected by dedicated 64-bit RF and I²C passwords.

It implements ISO/IEC 15693 protocol stack with full modulation/coding/subcarrier support, custom fast read up to 53 Kbit/s, and hardware-accelerated fast transfer mode using a 256-byte volatile mailbox buffer. The GPO pin supports configurable open-drain or CMOS output (depending on package) for RF field change, memory write completion, and fast transfer events.

Key Specifications

Pinout & Package

ST25DV64KC-JF6D3 is supplied in UFDFPN8 package (8-pin, 2 mm × 2 mm, 0.5 mm pitch), RoHS-compliant ECOPACK2. This variant features open-drain GPO output and no LPD/VDCG pins - optimized for cost-sensitive, space-constrained NFC tag designs requiring minimal external components.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ST25DV16KC-JF6D3 and NXH3670UK/N1Z, ST25DV64KC-JF6D3 provides 4× more EEPROM than the ST25DV16KC and 2× more than the NXH3670, enabling firmware metadata, multi-language UI strings, and cryptographic key rotation - critical for long-lifecycle industrial and medical deployments.

Availability

ST25DV64KC-JF6D3 is available at Aetrix Electronics and suitable for smart industrial labels, NFC-enabled asset trackers, medical device authentication, and consumer electronics configuration requiring stable component supply, long-term lifecycle support, and NFC Forum certification.

Supply support for ST25DV64KC-JF6D3 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and connectivity solutions for industrial, automotive, and consumer markets.

The ST25DVxxKC product line delivers dynamic NFC/RFID tag ICs with dual I²C/RF interfaces, targeting applications needing secure, battery-free data exchange between embedded systems and NFC-enabled mobile devices.

FAQ

What is the maximum RF data rate supported by ST25DV64KC-JF6D3?

The device supports custom fast read access up to 53 Kbit/s per ISO/IEC 15693, achieved through optimized subcarrier modulation and internal buffering. Standard ISO/IEC 15693 modes operate at 26.48 Kbit/s (high data rate) and 6.62 Kbit/s (low data rate). This 53 Kbit/s mode requires compatible reader firmware and is distinct from NFC Forum-defined rates.

How does the 256-byte fast transfer buffer function between I²C and RF interfaces?

The buffer acts as a volatile mailbox: host MCU writes data via I²C to the buffer address range (0x00–0xFF), then triggers a "fast transfer" command; the RF interface reads that exact content without EEPROM write latency. No EEPROM wear occurs during transfers, and buffer contents are lost on power loss - ensuring speed without compromising memory endurance.

Can the GPO pin be used to wake up a microcontroller from deep sleep?

Yes - GPO can be configured to assert on RF field detection or memory write completion. When wired to a microcontroller's external interrupt pin with appropriate pull-up, it generates a clean edge-triggered wake signal. The 100 µs turn-on time (if LPD is used) is negligible versus typical MCU wake latencies, making it suitable for ultra-low-power sensor nodes.

Is the UID truly unique and factory-programmed?

Yes - each ST25DV64KC-JF6D3 receives a globally unique 64-bit UID written during final test at ST's facility. It complies with ISO/IEC 15693 requirements and is stored in read-only system configuration memory. The UID is immutable, cannot be overwritten, and is used in anticollision inventory sequences - essential for asset-level identification.