STMicroelectronics ST25DV04KC-IE8T3

Overview

ST25DV04KC-IE8T3 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 ST25DV04KC-IE8T3 datasheet, ST25DV04KC-IE8T3 pinout, ST25DV04KC-IE8T3 application, or ST25DV04KC-IE8T3 equivalent, key selection criteria include RF/I²C coexistence timing, 4-byte block vs. byte addressing alignment, GPO interrupt configurability for field-change detection, and LPD-enabled low-power mode support in WLCSP10/UFDFPN12 packages.

Technical Context

This device implements a dual-interface architecture: the I²C interface operates as a standard 1 MHz serial EEPROM slave with byte-level access, while the RF interface complies fully with ISO/IEC 15693 and NFC Forum Type 5, supporting all modulations, coding schemes, subcarrier modes, and data rates up to 53 Kbit/s. Internal tuning capacitance is fixed at 28.5 pF for antenna matching.

The 256-byte volatile mailbox enables deterministic fast transfer between interfaces without host intervention; GPO supports mixed-event triggering (RF field change, memory write completion, fast transfer notification) and is configurable as open-drain (SO8/TSSOP8/UFDFPN8) or CMOS (WLCSP10/UFDFPN12), with VDCG required for CMOS drive.

Key Specifications

Pinout & Package

ST25DV04KC-IE8T3 is supplied in TSSOP8 package (ECOPACK2, RoHS-compliant), featuring 8-pin surface-mount footprint with exposed pad (EP). Pin functions are validated per DS13519 Rev 8 Figures 3 and 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ST25DV16KC-IE8T3, this part trades memory density for lower cost and smaller footprint in constrained-space designs; versus NXH3670UK/N1Z, it adds I²C programmability, GPO-driven system wake-up, and energy harvesting - enabling true hybrid wired/wireless embedded architectures.

Availability

ST25DV04KC-IE8T3 is available at Aetrix Electronics and suitable for smart industrial labels, medical calibration tags, IoT sensor identity modules, and automotive diagnostic tokens requiring stable component supply across extended temperature ranges and lifecycle-critical deployments.

Supply support for ST25DV04KC-IE8T3 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.

ST25DVxxKC belongs to ST's Dynamic NFC/RFID tag product line, engineered specifically to unify wired I²C configuration with contactless ISO/IEC 15693 data access - targeting applications needing secure, field-powered memory with host MCU integration.

FAQ

What is the function of the V_EH pin, and what load can it drive?

The V_EH pin provides an unregulated analog voltage derived from the RF field strength, usable to power low-current external components such as comparators, temperature sensors, or reset supervisors. Its output voltage scales with RF field amplitude and coil tuning but is not regulated; typical peak output is ~1.8 V under strong field conditions. Maximum recommended load is 10 µA continuous to avoid collapse of the harvested voltage or interference with RF communication.

How does memory addressing differ between I²C and RF interfaces?

I²C accesses user memory as a linear byte array (0x0000–0x01FF for ST25DV04KC), supporting sequential reads/writes without wraparound. RF accesses the same memory as 4-byte blocks (0x0000–0x007F), where each command reads or writes one or more full blocks. Extended RF commands allow full memory access; standard commands are limited to block 0x00–0xFF. The mapping is deterministic: RF block N contains I²C bytes (N×4) through (N×4)+3.

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

Yes - the GPO pin can be configured to assert on RF field detection, memory write completion, or fast transfer events. In TSSOP8, it operates as an open-drain output requiring an external pull-up resistor; the host MCU's external interrupt pin can monitor GPO state change. This enables zero-power listening: the host remains in deep sleep until GPO transitions, eliminating polling overhead and reducing system power consumption significantly.

Is the UID truly unique, and how is it programmed?

Yes - each ST25DV04KC-IE8T3 device has a factory-programmed 64-bit UID compliant with ISO/IEC 15693, written during wafer sort and permanently stored in the system configuration area. It is read-only, cannot be altered in the field, and is used during the anticollision inventory sequence. The UID value is laser-trimmed and verified per unit; no two devices share the same UID, ensuring globally unique identification in multi-tag environments.