STMicroelectronics ST25DV04K-JFR6D3

Overview

ST25DV04K-JFR6D3 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, 28.5 pF internal tuning capacitance, and fast transfer mode via 256-byte volatile buffer. It serves as a secure, field-powered memory bridge in smart labels, asset tracking tags, and industrial IoT sensors where battery-free operation and host-controlled RF event signaling are required.

For engineers reviewing the ST25DV04K-JFR6D3 datasheet, ST25DV04K-JFR6D3 pinout, ST25DV04K-JFR6D3 application, or ST25DV04K-JFR6D3 equivalent, key selection criteria include RF/I²C dual-interface coordination, GPO interrupt configurability (CMOS output), energy harvesting analog output (V_EH), four-zone password-protected memory partitioning, and -40 to 85 °C operating range in UFDFPN12 package.

Technical Context

The device implements a dual-domain architecture: I²C interface accesses memory byte-wise (up to 512 bytes), while RF interface accesses 4-byte blocks (up to 128 blocks) per ISO/IEC 15693 and NFC Forum Type 5 compliance. Its fast transfer mode uses a dedicated 256-byte volatile buffer to synchronize data between wired and contactless domains without host polling.

RF management includes configurable GPO output (CMOS, driven by V_DCG) for field change, memory write completion, or fast transfer end events; energy harvesting delivers unregulated analog voltage on V_EH when RF field strength suffices; and low-power down (LPD) input reduces standby current below 1 µA in 10-ball and 12-pin packages.

Key Specifications

Pinout & Package

ST25DV04K-JFR6D3 is packaged in UFDFPN12 (12-pin, 2.5 × 3.0 mm, 0.5 mm pitch), RoHS-compliant ECOPACK2, with exposed pad (EP) for thermal dissipation. This variant features CMOS GPO output and includes LPD and V_DCG pins for low-power mode control and GPO driver supply.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ST25DV16K-JFR6D3, this part offers lower memory density but reduced cost and footprint; versus NT3H2111, it provides superior security architecture, ISO/IEC 15693 interoperability, and deterministic RF/I²C synchronization - critical for industrial and medical use cases requiring audit-ready data integrity.

Availability

ST25DV04K-JFR6D3 is available at Aetrix Electronics and suitable for smart industrial labels, secure asset tracking tags, medical device calibration tokens, and IoT sensor node configuration modules requiring stable component supply, full lifecycle support, and traceable sourcing.

Supply support for ST25DV04K-JFR6D3 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 ST25DV family targets secure, battery-free identification and data exchange in industrial IoT and medical devices, combining NFC/RFID functionality with robust I²C host control and hardware-based memory protection.

FAQ

What is the function of the LPD pin on ST25DV04K-JFR6D3?

The LPD (Low Power Down) pin is an active-high input that disables the internal 1.8 V regulator to reduce standby current below 1 µA. It is available only in 10-ball WLCSP and 12-pin UFDFPN packages. When LPD is high, the regulator shuts off; turn-on time is ~100 µs, which adds to boot duration before full operation. The pin is internally pulled down, so tying it to V_SS enables normal operation.

How does the fast transfer mode buffer operate between I²C and RF interfaces?

The 256-byte volatile buffer acts as a mailbox: data written via I²C is instantly accessible via RF fast read commands, and vice versa. No host polling is needed - GPO can signal buffer readiness. The buffer is not EEPROM-backed; contents are lost on power loss or RF field removal. It enables deterministic, low-latency synchronization for applications like OTA parameter updates or real-time sensor data handoff.

Can ST25DV04K-JFR6D3 operate without a DC supply (V_CC)?

Yes - the device operates in pure contactless mode using only RF field energy. In this mode, V_CC is left unconnected, and internal rectification powers the IC. However, I²C interface is inactive without V_CC, and GPO functionality requires V_DCG if configured as CMOS output. Energy harvesting (V_EH) is also only available when RF field strength is sufficient.

What memory protection mechanisms are implemented in ST25DV04K-JFR6D3?

The device implements three-layer protection: (1) Four user memory areas, each configurable with independent 64-bit RF and I²C passwords; (2) System configuration area protected by a separate 64-bit RF/I²C password; (3) Dynamic registers allow temporary feature enable/disable without altering static configuration. Passwords are stored in dedicated EEPROM blocks and enforced at command decode level - no unprotected read/write access is possible.