STMicroelectronics ST25DV04K-JFR6U3

Overview

ST25DV04K-JFR6U3 from STMicroelectronics is a dynamic NFC/RFID tag IC with 4-Kbit EEPROM, dual I²C and ISO/IEC 15693 contactless interfaces, 1.8–5.5 V supply, 256-byte fast-transfer buffer, and energy harvesting output (V_EH). It serves as a secure, field-powered memory bridge in smart labels, industrial asset tags, and IoT sensor nodes requiring battery-free data exchange.

For engineers reviewing the ST25DV04K-JFR6U3 datasheet, ST25DV04K-JFR6U3 pinout, ST25DV04K-JFR6U3 application, or ST25DV04K-JFR6U3 equivalent, key selection criteria include RF/I²C coexistence timing, GPO interrupt configurability (CMOS vs. open-drain), LPD low-power mode support, and password-protected memory area partitioning for multi-access security.

Technical Context

The device implements a dual-interface architecture: I²C operates at up to 1 MHz with byte-level addressing, while RF complies fully with ISO/IEC 15693 and NFC Forum Type 5, supporting all sub-carrier modes and data rates up to 53 Kbit/s in fast read mode. Its internal 28.5 pF tuning capacitance eliminates external matching components for antenna integration.

Memory access is segregated: RF reads/writes 4-byte blocks (0–127 blocks for ST25DV04K), I²C accesses individual bytes (0–511 bytes), and the 256-byte volatile mailbox enables atomic cross-interface transfers. Security is enforced via three 64-bit RF passwords (per user area) and one 64-bit I²C password, plus separate 64-bit configuration protection.

Key Specifications

Pinout & Package

ST25DV04K-JFR6U3 is supplied in UFDFPN12 package (3 × 3 mm, 0.5 mm pitch), RoHS-compliant ECOPACK2, with exposed pad (EP) and CMOS GPO output requiring V_DCG supply.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NT3H2111W0FHKH and N24RF04, ST25DV04K-JFR6U3 uniquely combines ISO15693/NFC Forum Type 5 certification, 256-byte fast-transfer buffer, CMOS GPO with LPD control, and energy harvesting - making it the only option for industrial-grade, battery-free, event-driven dual-interface tagging.

Availability

ST25DV04K-JFR6U3 is available at Aetrix Electronics and suitable for smart asset tagging, industrial sensor calibration, secure product authentication, and medical device traceability requiring stable component supply across automotive, industrial, and healthcare OEM programs.

Supply support for ST25DV04K-JFR6U3 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 ST25 family targets secure, battery-free identification and data exchange, with ST25DVxxx optimized for dual-interface (I²C + ISO15693) applications demanding field-powered operation, fast data handoff, and robust memory security.

FAQ

What is the function of the V_DCG pin on ST25DV04K-JFR6U3?

V_DCG supplies power exclusively to the CMOS GPO driver block. It must be connected to an external 1.8–5.5 V source; if left floating, the GPO pin remains inactive. This separation allows GPO logic levels to be set independently of V_CC, enabling mixed-voltage system interfacing - for example, driving a 3.3 V microcontroller interrupt pin from a 1.8 V I²C bus.

How does the Fast Transfer Mode reduce EEPROM wear during frequent data updates?

Fast Transfer Mode uses a 256-byte volatile RAM buffer (mailbox) to stage data between I²C and RF interfaces. Hosts write updated parameters to the buffer via I²C, then trigger RF-side read - avoiding direct EEPROM writes for every update. Since EEPROM writes consume endurance cycles (1M @25°C), buffering shifts wear to volatile memory, extending tag lifetime by >100× in high-update-rate scenarios like sensor logging.

Can ST25DV04K-JFR6U3 operate without a DC supply (V_CC)?

Yes - ST25DV04K-JFR6U3 operates in pure contactless mode using only RF field energy. The internal rectifier and regulator power all circuits from AC0/AC1 antenna inputs. V_CC is optional and used only when wired I²C communication is needed simultaneously with RF operation (dual-interface mode) or to power external circuitry via V_EH.

What memory protection mechanisms prevent unauthorized access to stored calibration data?

Calibration data can be placed in User Area 1, protected by a dedicated 64-bit RF password (for field read/write) and a separate 64-bit I²C password (for factory programming). The system configuration area - containing ENDA registers that define area boundaries - is itself secured by a third 64-bit configuration password, preventing attackers from redefining memory access zones to bypass protection.