STMicroelectronics ST25DV64KC-JF8D3

Overview

ST25DV64KC-JF8D3 from STMicroelectronics is a dynamic NFC/RFID tag IC with dual I²C and ISO/IEC 15693 contactless interfaces, 64 Kbit EEPROM, fast transfer mode (256-byte buffer), energy harvesting output (V_EH), and configurable GPO interrupt. It operates from 1.8–5.5 V, supports 1 MHz I²C, and delivers up to 53 Kbit/s RF read speed in NFC Forum Type 5 certified operation.

For engineers reviewing the ST25DV64KC-JF8D3 datasheet, ST25DV64KC-JF8D3 pinout, ST25DV64KC-JF8D3 application, or ST25DV64KC-JF8D3 equivalent, key selection criteria include dual-interface memory mapping (4-byte RF blocks vs. byte-addressed I²C), RF/I²C password protection architecture (three 64-bit RF user passwords + one I²C password), fast transfer mode latency, and package-specific LPD/VDCG support for low-power operation.

Technical Context

The ST25DV64KC-JF8D3 implements a dual-domain memory controller: I²C accesses 8192 bytes of EEPROM as linear byte addresses, while RF accesses the same memory as 2048 blocks of 4 bytes per block per ISO/IEC 15693. Its fast transfer mode uses a dedicated 256-byte volatile mailbox buffer to enable high-throughput data exchange between wired and contactless domains without EEPROM wear.

It integrates an analog front-end with internal 28.5 pF tuning capacitance for antenna matching, supports all ISO/IEC 15693 modulation/coding/subcarrier modes, and provides configurable GPO signaling for RF field detection, memory write completion, and fast transfer events - with open-drain output in SO8/TSSOP8/UFDFPN8 packages and CMOS output in WLCSP10/UFDFPN12 variants.

Key Specifications

Pinout & Package

ST25DV64KC-JF8D3 is supplied in SO8N (8-pin narrow SOIC) package with open-drain GPO output and no LPD/VDCG pins. This variant supports standard I²C and RF operation without low-power-down mode.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ST25DV64KC-JF8D3, the ST25DV16KC-JF8D3 offers identical architecture at reduced density and cost, while the NT3H2211 targets consumer NFC apps with NDEF compatibility but omits RF/I²C co-processing and energy harvesting - making it unsuitable for batteryless industrial nodes.

Availability

ST25DV64KC-JF8D3 is available at Aetrix Electronics and suitable for smart industrial sensors, secure asset tagging, energy-harvesting IoT nodes, and automotive service log tags requiring stable component supply across extended temperature ranges and dual-interface flexibility.

Supply support for ST25DV64KC-JF8D3 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, 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 optimized for secure, dual-interface memory applications - enabling seamless integration of contactless functionality into wired systems without compromising data integrity or power autonomy.

FAQ

What is the maximum RF data rate supported by ST25DV64KC-JF8D3?

The ST25DV64KC-JF8D3 supports a custom fast read access mode delivering up to 53 Kbit/s over ISO/IEC 15693, achieved through optimized subcarrier handling and internal buffering - significantly exceeding the base 26.48 Kbit/s rate of standard Mode 1, 1-out-of-4 coding.

How does the fast transfer mode reduce EEPROM wear during frequent I²C-to-RF data exchange?

Fast transfer mode uses a dedicated 256-byte volatile buffer (mailbox) to stage data between I²C and RF interfaces. Data written via I²C is copied to the buffer and then transferred to RF memory in bulk, avoiding individual EEPROM write cycles - extending endurance beyond 1 million cycles even with high-frequency updates.

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

Yes - the GPO pin can be configured to emit a positive pulse on RF field detection or memory write completion. In SO8N packages, its open-drain output connects directly to a microcontroller's external interrupt pin with pull-up, enabling reliable wake-up without additional level-shifting circuitry.

What is the role of the internal 28.5 pF tuning capacitance in antenna design?

The integrated 28.5 pF capacitor reduces external component count by providing part of the LC tank resonance compensation for the AC0/AC1 antenna interface. It enables robust ISO/IEC 15693 operation with fewer discrete components - simplifying PCB layout and improving RF field sensitivity tolerance across manufacturing variance.