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Home > Products > RF and Wireless > RFID, RF Access, Monitoring ICs

STMicroelectronics ST25DV04KC-IE6T3

Name: ST25DV04KC-IE6T3
Brand: STMicroelectronics
SKU: ST25DV04KC-IE6T3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ST25DV04KC-IE6T3

Manufacturer:: STMicroelectronics

Category:: RFID, RF Access, Monitoring ICs

Package:: 8-TSSOP (0.173", 4.40mm Width)

Datasheet:: ST25DV04KC-IE6T3.pdf

Description:: MEMORY

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ST25DV04KC-IE6T3 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_E_H). It operates as a secure, field-powered memory node in smart labels, industrial asset tags, and IoT sensor nodes requiring battery-free configuration.

For engineers reviewing the ST25DV04KC-IE6T3 datasheet, ST25DV04KC-IE6T3 pinout, ST25DV04KC-IE6T3 application, or ST25DV04KC-IE6T3 equivalent, key selection criteria include RF/I²C dual-interface coherency, 4-Kbit user EEPROM organization (128 blocks × 4 bytes / 512 bytes), configurable GPO interrupt behavior, and support for NFC Forum Type 5 certification and ISO/IEC 15693 subcarrier modes.

Technical Context

The device implements a dual-domain architecture: an I²C interface (up to 1 MHz) accesses memory byte-wise, while the RF interface (ISO/IEC 15693 compliant) accesses memory in 4-byte blocks. Internal 28.5 pF tuning capacitance enables direct antenna coil connection without external matching components.

It features a 256-byte volatile mailbox buffer enabling fast transfer mode between RF and I²C domains, and supports three 64-bit RF passwords plus one 64-bit I²C password for granular area-level read/write protection across four user memory areas - all managed via system configuration registers protected by a dedicated 64-bit configuration password.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory capacity	4-Kbit EEPROM = 512 bytes (I²C) / 128 blocks × 4 bytes (RF)
I²C interface speed	Up to 1 MHz - enables high-speed wired configuration without bus contention
RF protocol compliance	ISO/IEC 15693 & NFC Forum Type 5 certified - ensures interoperability with standard NFC readers
Fast transfer buffer	256-byte volatile mailbox - eliminates latency when synchronizing RF-initiated updates with host MCU
Energy harvesting output	V_E_H analog pin - delivers unregulated RF-derived voltage to power external sensors or logic (e.g., wake-up circuitry)
Data retention	40 years at 25 °C - guarantees long-term firmware or calibration data persistence in maintenance-free deployments
Write endurance	1 million cycles at 25 °C - supports frequent reprogramming in field-upgradable devices

Pinout & Package

ST25DV04KC-IE6T3 is supplied in UFDFPN8 package (ECOPACK2, RoHS-compliant), 2 × 3 mm, 0.5 mm pitch, with exposed pad (EP) left floating. Pin functions are validated per DS13519 Rev 8 Figure 4.

Pin/Terminal	Circuit Role	Design Meaning
V_E_H	Energy harvesting analog output	Delivers unregulated RF-derived voltage; high-Z when field weak or EH disabled - usable for passive wake-up of companion ICs
AC0 / AC1	RF antenna coil terminals	Differential inputs for 13.56 MHz LC tank; internal 28.5 pF tuning capacitance reduces external component count
V_SS	Ground reference	Common return for V_CC, V_DCG, and V_E_H; must be low-impedance for stable RF demodulation and I²C signaling
V_CC	DC supply input	1.8–5.5 V wired power source; internal regulator isolates V_CC from rectified RF supply - prevents backfeed
GPO	Configurable interrupt output	Open-drain output (pull-up ≥4.7 kΩ required); signals RF field change, memory write completion, or mailbox activity
SCL	I²C serial clock input	Strobes I²C data; requires external pull-up; supports clock stretching during internal write cycles
SDA	I²C bidirectional data line	Open-drain I/O; wire-OR capable; pull-up required; acknowledges address and data phases per I²C spec

Key Features

Feature	Design Value
ISO/IEC 15693 dual-interface coherence	Same user memory mapped as 512 bytes (I²C) and 128 blocks (RF) - enables seamless cross-interface data consistency
Four-area memory protection	Independent 64-bit RF passwords per area + 1× I²C password - allows differentiated access control for firmware, config, logs, and calibration data
Configurable GPO interrupt	Single pin reports RF field presence, memory write completion, or fast-transfer mailbox status - reduces GPIO usage on host MCU
Fast transfer mode	256-byte volatile buffer enables atomic RF-to-I²C data handoff - avoids race conditions during concurrent interface access
Energy harvesting capability	V_E_H pin provides usable analog voltage under RF field - powers low-quiescent circuits without battery or wired supply

Applications

Smart Asset Tagging

Industrial Sensor Calibration

Use Scenario: Reusable metal-mount RFID tag on CNC tooling or robotic end-effectors, updated via handheld NFC reader and verified via I²C-connected microcontroller during setup.

IC Role / Device Role / Timing Role: Dual-interface memory node storing tool ID, wear counters, and calibration offsets - accessed contactlessly for field update and wired for real-time verification.

Use Value: Eliminates manual barcode scanning and enables automated calibration validation before machine startup using same memory image.

Use Scenario: Temperature/humidity sensor module where factory calibration coefficients are written via I²C during production and later adjusted via NFC during field recalibration.

IC Role / Device Role / Timing Role: Secure nonvolatile storage for multi-point calibration tables - protected by separate RF and I²C passwords to prevent unauthorized overwrite.

Use Value: Enables traceable, reader-authenticated recalibration without opening enclosure or disrupting sensor operation.

IoT Edge Device Configuration

NFC-Enabled Power Tool Battery Pack

Use Scenario: Gateway device with embedded ST25DV04KC-IE6T3 stores network credentials, firmware version, and operational limits - updated over NFC during commissioning and read over I²C at boot.

IC Role / Device Role / Timing Role: Trusted configuration vault bridging provisioning (RF) and runtime (I²C) domains - leverages fast transfer buffer to synchronize credential updates.

Use Value: Prevents credential exposure during wireless provisioning by decoupling RF write from I²C read via mailbox handshake.

Use Scenario: Cordless power tool battery pack with NFC tag storing charge cycle count, health metrics, and safety thresholds - read by tool handle during insertion and updated via service NFC reader.

IC Role / Device Role / Timing Role: Tamper-resistant lifecycle log - GPO pin pulses on each RF write to trigger host MCU logging; V_E_H powers low-power comparator for voltage monitoring.

Use Value: Enables battery authentication and real-time health reporting without adding active circuitry or battery drain.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
NXP NT3H2111W0FHKH	1-Kbyte EEPROM, no energy harvesting output, fixed 7-bit I²C address (0x57), no LPD pin	Lacks V_E_H and fast transfer buffer; limited to simpler NFC-only use cases without wired coordination	Select when only basic NFC tag functionality is needed and I²C host coordination is unnecessary
ON Semiconductor N24RF04	4-Kbit EEPROM, I²C-only interface (no RF), no GPO or energy harvesting, SOIC-8 package	Requires separate NFC transceiver IC for contactless access; no integrated RF front-end or antenna tuning	Select when full control over timing and security is required via wired-only interface and external RF solution

Compared with NT3H2111W0FHKH and N24RF04, ST25DV04KC-IE6T3 uniquely integrates ISO/IEC 15693 RF + I²C dual access, energy harvesting, and 256-byte mailbox - enabling true battery-free, self-synchronizing smart tags where RF initiates and I²C validates.

Availability

ST25DV04KC-IE6T3 is available at Aetrix Electronics and suitable for smart industrial labeling, NFC-enabled sensor calibration, and IoT edge device configuration requiring stable component supply, ECOPACK2 compliance, and guaranteed 40-year data retention.

Supply support for ST25DV04KC-IE6T3 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.

This device belongs to the ST25 Dynamic NFC tag product line, engineered specifically for secure, dual-interface data exchange between contactless readers and embedded systems - targeting applications where battery-free operation, field programmability, and hardware-enforced memory partitioning are critical.

FAQ

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

The V_E_H pin delivers unregulated analog voltage derived from the RF field strength. It operates in high-Z state when the RF field is absent or insufficient. Per DS13519 Rev 8 Section 2.5, it is not current-limited or regulated - typical output is ~1.2–3.3 V depending on field strength and antenna coupling. It can drive ultra-low-power comparators or reset supervisors drawing ≤10 µA; external regulation is required for higher loads.

How does memory addressing differ between I²C and RF interfaces?

I²C accesses user memory as 512 contiguous bytes (0x0000–0x01FF), supporting sequential reads without rollover. RF accesses the same memory as 128 blocks of 4 bytes each (0x0000–0x007F), where each block maps to 4 consecutive I²C bytes. For example, RF Block 0x00 contains I²C bytes 0x0000–0x0003. Extended RF commands allow full memory access; standard commands are limited to first 256 blocks.

Can the GPO pin be used to wake up an external microcontroller?

Yes. The GPO pin can be configured to assert on RF field detection, memory write completion, or fast-transfer mailbox events. In open-drain configuration (as on UFDFPN8), it requires an external pull-up resistor (≥4.7 kΩ). When asserted, it can serve as a wake-up interrupt for an MCU in deep-sleep mode - confirmed in DS13519 Section 2.4.2 and Figure 4 pinout.

What is the purpose of the LPD pin, and is it present on ST25DV04KC-IE6T3?

The LPD (Low Power Down) pin disables the internal 1.8 V regulator to reduce standby current below 1 µA. However, ST25DV04KC-IE6T3 in UFDFPN8 package does not include LPD - this pin is exclusive to WLCSP10 and UFDFPN12 packages per Table 1 and Table 3 of DS13519 Rev 8. The IE6T3 variant uses open-drain GPO and lacks LPD functionality.

ST25DV04KC-IE6T3 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: RFID Transponder

Frequency:: 13.56MHz

Standards:: ISO 15693, NFC

Interface:: I2C

Voltage - Supply:: 1.8V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: 8-TSSOP

ST25DV04KC-IE6T3 FAQ

1.How can I place an order for ST25DV04KC-IE6T3 through Aetrix?

Please submit a Request for Quotation (RFQ) for ST25DV04KC-IE6T3 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ST25DV04KC-IE6T3 reliable?

The price and inventory of ST25DV04KC-IE6T3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST25DV04KC-IE6T3 is usually 5 days.

3.What payment methods are accepted for ST25DV04KC-IE6T3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST25DV04KC-IE6T3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ST25DV04KC-IE6T3?

ST25DV04KC-IE6T3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ST25DV04KC-IE6T3 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ST25DV04KC-IE6T3?

For technical support, including ST25DV04KC-IE6T3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST25DV04KC-IE6T3 requirements.

6.How does Aetrix verify that ST25DV04KC-IE6T3 is sourced from the original manufacturer or authorized distributors?

All ST25DV04KC-IE6T3 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ST25DV04KC-IE6T3 meets industry standards.

7.What is the process for return or replacement of ST25DV04KC-IE6T3?

All ST25DV04KC-IE6T3 units undergo pre-shipment inspection (PSI). If there is an issue with ST25DV04KC-IE6T3, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ST25DV04KC-IE6T3 part is unused and in its original packaging.

Return procedure for ST25DV04KC-IE6T3:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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