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

STMicroelectronics ST25DV04K-IER8C3

Name: ST25DV04K-IER8C3
Brand: STMicroelectronics
SKU: ST25DV04K-IER8C3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ST25DV04K-IER8C3

Manufacturer:: STMicroelectronics

Category:: RFID, RF Access, Monitoring ICs

Package:: 8-UFDFN Exposed Pad

Datasheet:: ST25DV04K-IER8C3.pdf

Description:: IC RFID TRANSP 13.56MHZ 8UFDFPN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ST25DV04K-IER8C3 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 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-IER8C3 datasheet, ST25DV04K-IER8C3 pinout, ST25DV04K-IER8C3 application, or ST25DV04K-IER8C3 equivalent, key selection criteria include RF/I²C dual-interface timing coordination, GPO interrupt configuration for RF activity detection, 4-Kbit user memory partitioning into four password-protected areas, and compatibility with NFC Forum Type 5 certification requirements.

Technical Context

The device implements a dual-domain architecture: an I²C slave interface (up to 1 MHz) accesses EEPROM byte-wise, while the ISO/IEC 15693 RF interface accesses memory in 4-byte blocks at up to 53 Kbit/s. Its internal 28.5 pF tuning capacitance enables direct antenna coil connection without external matching components.

Fast Transfer Mode uses a dedicated 256-byte volatile buffer to synchronize data between RF and I²C domains; GPO supports configurable interrupts (field change, write completion, mailbox availability) with open-drain output; energy harvesting delivers unregulated analog voltage (V_E_H) when RF field strength permits.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory capacity	4-Kbit EEPROM = 512 bytes via I²C, 128 blocks × 4 bytes via RF
I²C interface speed	Up to 1 MHz - enables high-speed wired host communication without bus contention
RF interface standard	ISO/IEC 15693 & NFC Forum Type 5 certified - ensures interoperability with commercial NFC readers
Write endurance	1 million cycles at 25 °C - supports frequent firmware/data updates in maintenance applications
Data retention	40 years - guarantees long-term integrity of calibration data or device identity stored in EEPROM
Supply voltage range	1.8 V to 5.5 V - compatible with both low-voltage microcontrollers and legacy 3.3/5 V systems
Energy harvesting output	V_E_H analog pin - powers external sensors or logic when RF field is active and sufficient

Pinout & Package

ST25DV04K-IER8C3 is packaged in UFDFPN8 (8-pin, 2 × 2 mm, 0.5 mm pitch), RoHS-compliant ECOPACK2, with exposed pad (EP) and open-drain GPO output.

Pin/Terminal	Circuit Role	Design Meaning
V_CC	DC power supply input	Accepts 1.8–5.5 V; powers I²C interface and internal regulator; isolated from RF rectified supply
V_SS	Ground reference	Common return for V_CC, V_DCG, and V_E_H; must be low-impedance for stable RF operation
SCL	I²C clock input	Open-drain compatible; requires external pull-up; synchronizes byte transfers at up to 1 MHz
SDA	I²C bidirectional data	Open-drain I/O; shares bus with other slaves; pull-up required per I²C specification
GPO	Configurable interrupt output	Open-drain; signals RF field presence, memory write completion, or mailbox events; requires ≥4.7 kΩ pull-up
V_E_H	Energy harvesting analog output	Unregulated analog voltage sourced from RF field; high-Z when inactive or insufficient field strength
AC0 / AC1	Antenna coil terminals	Differential RF input; connect directly to tuned LC antenna; no DC bias or external components permitted
EP	Exposed thermal pad	Must be left floating or grounded per PCB layout guidelines; improves thermal dissipation and EMI performance

Key Features

Feature	Design Value
Fast Transfer Mode buffer	256-byte volatile mailbox enables deterministic, low-latency data handoff between RF and I²C domains
Four-area memory protection	User memory partitioned into 4 configurable zones, each independently protected by 64-bit RF/I²C passwords
NFC Forum Type 5 certification	Guarantees out-of-box compatibility with Android NFC hosts and enterprise RFID infrastructure
Dynamic register access	Real-time status reporting (e.g., RF activity, field strength, mailbox full) via I²C or RF read commands
Low-power RF boot	t_BootRF < 1 ms - enables rapid response to reader polling in duty-cycled sensor applications

Applications

Smart Industrial Labels

Secure Asset Tracking Tags

Use Scenario: Permanent mounting on factory machinery for maintenance logs, calibration history, and firmware version storage.

IC Role / Device Role / Timing Role: Dual-interface EEPROM bridge: I²C writes configuration during service; RF reads diagnostics during handheld scan.

Use Value: Eliminates battery dependency; 40-year data retention preserves equipment lifecycle records; password-protected areas prevent unauthorized firmware overwrite.

Use Scenario: Tamper-evident tagging of high-value tools or medical devices across hospital logistics networks.

IC Role / Device Role / Timing Role: Secure NFC tag with UID and AFI/DSFID registers: enables anticollision inventory and application-family filtering in multi-tag environments.

Use Value: NFC Forum Type 5 compliance ensures Android compatibility; four password-protected memory areas isolate audit logs, ownership data, and usage counters.

IoT Sensor Node Identity

Energy-Harvesting Edge Devices

Use Scenario: Embedding in wireless temperature/humidity sensors deployed in HVAC ducts or remote enclosures.

IC Role / Device Role / Timing Role: Persistent identity store: holds unique UID, calibration coefficients, and last-seen timestamp accessible via I²C at boot and RF on demand.

Use Value: Factory-programmed UID ensures traceability; 1 million write cycles support daily recalibration logging; RF read avoids physical connector wear.

Use Scenario: Battery-free environmental monitor powered solely by NFC reader field during periodic data upload.

IC Role / Device Role / Timing Role: Energy harvesting source: V_E_H pin supplies 1.2–3.3 V to ultra-low-power MCU or ADC during RF activation.

Use Value: Enables zero-battery operation; unregulated V_E_H output matches typical LDO input range; fast RF boot (<1 ms) minimizes field-on time and reader power draw.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ST25DV16K-IER8C3	16-Kbit EEPROM (2048 bytes), same pinout and feature set	Supports larger configuration datasets or multi-sensor fusion metadata storage	Select when >512 bytes of persistent, field-accessible memory is required without changing PCB layout
NXH3670UK/V1	Single-interface NFC tag IC (RF only), no I²C, 1-Kbit memory, integrated antenna driver	Lacks wired interface; targets pure contactless use cases with minimal footprint	Choose only if I²C host control is unnecessary and board space is constrained beyond UFDFPN8 limits

Compared with ST25DV16K-IER8C3, this part reduces memory cost and power overhead where 4-Kbit suffices; versus NXH3670UK/V1, it adds critical I²C configurability and larger secure storage but requires additional routing for SDA/SCL/GPO.

Availability

ST25DV04K-IER8C3 is available at Aetrix Electronics and suitable for smart label deployment, industrial asset tracking, IoT sensor identity management, and energy-harvesting edge devices requiring stable component supply across production lifecycles.

Supply support for ST25DV04K-IER8C3 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, specializing in microcontrollers, power management, sensors, and secure connectivity solutions for industrial, automotive, and consumer markets.

The ST25DV family targets secure, dual-interface NFC data exchange-designed to replace mechanical DIP switches and passive tags with programmable, field-upgradable memory in maintenance-critical and battery-constrained systems.

FAQ

What is the function of the V_E_H pin, and what voltage range can it deliver?

V_E_H is an unregulated analog energy harvesting output that delivers voltage derived from the RF carrier field. Its output depends on antenna coupling, field strength, and tuning; typical values range from ~1.2 V to 3.3 V under strong NFC reader fields. When the RF field is absent or insufficient, V_E_H enters high-impedance state and supplies no current.

How does memory protection work across I²C and RF interfaces?

User memory is divided into up to four configurable areas, each protected by independent 64-bit passwords: three for RF read/write access and one for I²C write access. The system configuration area (including ENDA registers and UID) is secured by a separate 64-bit configuration password accessible via both interfaces, preventing unauthorized re-partitioning or UID modification.

Can ST25DV04K-IER8C3 operate without a DC supply (V_CC)?

Yes-it functions fully in contactless mode using only RF power. The internal rectifier and regulator generate all necessary voltages from the AC0/AC1 antenna inputs. V_CC is optional and used only when wired I²C communication or GPO-driven wake-up of a host MCU is required during RF idle periods.

What is the purpose of the GPO pin, and how is it configured?

GPO is a configurable open-drain interrupt output signaling RF events: field detection, memory write completion, Fast Transfer readiness, or custom pulses. Configuration is done via I²C-accessible GPO_CTRL registers; default behavior is RF field change detection. An external pull-up resistor (>4.7 kΩ) is mandatory for proper logic-level operation.

ST25DV04K-IER8C3 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: ST25D

Package/Case:: 8-UFDFN Exposed Pad

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 ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-UFDFPN (2x3)

ST25DV04K-IER8C3 FAQ

1.How can I place an order for ST25DV04K-IER8C3 through Aetrix?

Please submit a Request for Quotation (RFQ) for ST25DV04K-IER8C3 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 ST25DV04K-IER8C3 reliable?

The price and inventory of ST25DV04K-IER8C3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST25DV04K-IER8C3 is usually 5 days.

3.What payment methods are accepted for ST25DV04K-IER8C3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST25DV04K-IER8C3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ST25DV04K-IER8C3?

ST25DV04K-IER8C3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ST25DV04K-IER8C3 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 ST25DV04K-IER8C3?

For technical support, including ST25DV04K-IER8C3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST25DV04K-IER8C3 requirements.

6.How does Aetrix verify that ST25DV04K-IER8C3 is sourced from the original manufacturer or authorized distributors?

All ST25DV04K-IER8C3 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 ST25DV04K-IER8C3 meets industry standards.

7.What is the process for return or replacement of ST25DV04K-IER8C3?

All ST25DV04K-IER8C3 units undergo pre-shipment inspection (PSI). If there is an issue with ST25DV04K-IER8C3, 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 ST25DV04K-IER8C3 part is unused and in its original packaging.

Return procedure for ST25DV04K-IER8C3:

1.Submit a request within 90 days.

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

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