STMicroelectronics ST25DV04K-JFR6L3

Overview

ST25DV04K-JFR6L3 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 configurable GPO interrupt output. It enables secure, battery-free data exchange in smart labels, industrial asset tags, and IoT sensor nodes where wired + wireless access to shared memory is required.

For engineers reviewing the ST25DV04K-JFR6L3 datasheet, ST25DV04K-JFR6L3 pinout, ST25DV04K-JFR6L3 application, or ST25DV04K-JFR6L3 equivalent, key selection criteria include RF/I²C coexistence timing, 4-Kbit user memory partitioning, 64-bit password protection per memory area, and CMOS GPO behavior requiring VDCG bias - all critical for secure NFC-enabled embedded systems.

Technical Context

The device implements a dual-domain architecture: I²C interface accesses memory byte-wise (0–511 bytes), while RF interface accesses it block-wise (0–127 blocks × 4 bytes), with address mapping strictly defined in DS10925 Rev 11. Its internal 28.5 pF tuning capacitance eliminates external matching components for ISO/IEC 15693 antenna design.

Fast Transfer Mode uses a dedicated 256-byte volatile mailbox to synchronize data between RF and I²C domains without host intervention; GPO supports configurable event-triggered outputs (field change, write completion, mailbox activity) in CMOS mode when VDCG is supplied - a capability absent in open-drain variants.

Key Specifications

Pinout & Package

ST25DV04K-JFR6L3 is packaged in UFDFPN12 (12-pin, 2.5 × 3.0 mm, 0.5 mm pitch), RoHS-compliant ECOPACK2, with CMOS GPO output requiring VDCG bias and LPD pin for low-power mode control.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ST25DV16K-JFR6L3, this part offers lower memory density but identical security, timing, and interface behavior - ideal for cost-sensitive designs where 4 Kbit suffices. Versus NXH3670UK/N1E, ST25DV04K-JFR6L3 provides deterministic mailbox synchronization and configurable GPO events essential for coordinated dual-interface systems.

Availability

ST25DV04K-JFR6L3 is available at Aetrix Electronics and suitable for smart labels, NFC-enabled sensor nodes, secure product authentication, and medical device calibration storage requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for ST25DV04K-JFR6L3 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 ICs, sensors, and connectivity solutions for industrial, automotive, and consumer markets.

The ST25DV family targets secure, dual-interface data storage in NFC-enabled edge devices - emphasizing interoperability, tamper resistance, and energy autonomy through integrated RF harvesting and fast transfer architecture.

FAQ

What is the function of the VDCG pin on ST25DV04K-JFR6L3?

VDCG supplies power exclusively to the CMOS GPO driver circuit. When left floating, GPO remains inactive regardless of register settings. It must be connected to a stable 1.8–5.5 V source to enable high-level assertion on RF field detection, memory write completion, or Fast Transfer events - a requirement unique to the -JF package variant.

How does memory addressing differ between I²C and RF interfaces?

I²C accesses user memory byte-wise (0–511), while RF accesses it block-wise (0–127 blocks × 4 bytes). Block 00h maps to I²C bytes 0000h–0003h; block 01h maps to 0004h–0007h, and so on. This strict 1:4 mapping is fixed in silicon and documented in Table 2 of DS10925 Rev 11 - no software remapping is possible.

Can ST25DV04K-JFR6L3 operate without a DC supply (VCC)?

Yes - it functions in pure contactless mode using only RF field energy. In this configuration, VCC is left unconnected, and the internal rectifier powers all circuits. However, GPO requires VDCG bias to operate, and energy harvesting (V_EH) is only active when RF field strength exceeds threshold - no DC supply is needed for basic RFID tag operation.

What is the purpose of the LPD pin, and which packages support it?

LPD controls the internal 1.8 V regulator: pulling it high disables the regulator, reducing standby current to <1 µA. It is available only on 10-ball WLCSP and 12-pin UFDFPN packages (including ST25DV04K-JFR6L3), and is internally pulled down - no external pull-down is required. It has no function in 8-pin SO8/TSSOP8/UFDFPN8 variants.