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

STMicroelectronics ST25DV64K-IER8S3

Name: ST25DV64K-IER8S3
Brand: STMicroelectronics
SKU: ST25DV64K-IER8S3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ST25DV64K-IER8S3

Manufacturer:: STMicroelectronics

Category:: RFID, RF Access, Monitoring ICs

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: ST25DV64K-IER8S3.pdf

Description:: IC RFID TRANSP 13.56MHZ 8SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ST25DV64K-IER8S3 from STMicroelectronics is a dynamic NFC/RFID tag IC with dual I²C and ISO/IEC 15693 contactless interfaces, 64 Kbit EEPROM, 256-byte fast-transfer buffer, and energy harvesting output (V_E_H). It operates from 1.8–5.5 V, supports 1 MHz I²C, and delivers up to 53 Kbit/s RF read speed - deployed in smart sensors, industrial asset tags, and NFC-enabled medical devices for secure, battery-free data exchange.

For engineers reviewing the ST25DV64K-IER8S3 datasheet, ST25DV64K-IER8S3 pinout, ST25DV64K-IER8S3 application, or ST25DV64K-IER8S3 equivalent, key selection criteria include RF/I²C dual-interface coordination, configurable GPO interrupt behavior, 4-area memory protection with 64-bit passwords, and LPD-enabled low-power mode in 10-ball/12-pin packages.

Technical Context

The device implements a dual-world architecture: I²C interface accesses memory byte-wise (up to 8192 bytes), while RF interface accesses 4-byte blocks (up to 2048 blocks) per ISO/IEC 15693 and NFC Forum Type 5 compliance. Its internal 28.5 pF tuning capacitance eliminates external matching components for standard antenna designs.

Fast Transfer Mode uses a dedicated 256-byte volatile mailbox buffer to enable synchronous data handoff between RF and I²C domains without host intervention. The GPO pin supports configurable event reporting - including RF field change, memory write completion, and Fast Transfer end - with open-drain (IE version) or CMOS (JF version) output logic.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory capacity	64 Kbit EEPROM (8192 bytes via I²C; 2048 × 4-byte blocks via RF)
I²C interface speed	Up to 1 MHz - enables high-speed wired configuration and firmware update without bus contention
RF data rate	Up to 53 Kbit/s (fast read) - reduces tag interrogation time in high-throughput logistics scanning
Write endurance	1 million cycles at 25 °C - ensures long-term reliability in reprogrammable asset tracking applications
Data retention	40 years - guarantees archival integrity for medical device calibration logs and industrial calibration records
Supply voltage range	1.8 V to 5.5 V - supports direct integration with 3.3 V microcontrollers and legacy 5 V systems
Operating temperature	−40 °C to 105 °C (UDFNP8/12); −40 °C to 125 °C (SO8N/TSSOP8, RF interface limited to 105 °C)

Pinout & Package

ST25DV64K-IER8S3 is supplied in an 8-pin UFDFPN8 package (ECOPACK2, RoHS-compliant), featuring exposed pad (EP) and open-drain GPO output. Pin functions are validated per STMicroelectronics DS10925 Rev 11 (pages 4–5).

Pin/Terminal	Circuit Role	Design Meaning
V_CC	DC supply input	Accepts 1.8–5.5 V; powers internal regulator and I²C logic - decoupling capacitor (10–100 nF) required near pins
V_SS	Ground reference	Common return for V_CC, V_DCG, and V_E_H; must be low-impedance connection to minimize noise coupling into RF front-end
SDA	I²C bidirectional data	Open-drain I/O requiring external pull-up (>4.7 kΩ); supports multi-master arbitration and clock stretching
SCL	I²C clock input	Input-only; requires same pull-up as SDA; timing compliant with standard-mode and fast-mode I²C specifications
GPO	Configurable interrupt output	Open-drain output (IE version); asserts low on RF field change, memory write, or Fast Transfer completion - used for MCU wake-up or status signaling
V_E_H	Energy harvesting analog output	Delivers unregulated RF-derived voltage when field strength suffices; high-Z when inactive - powers auxiliary sensors or bias circuits
AC0 / AC1	RF antenna interface	Differential inputs for external LC tank; no DC path allowed; internal 28.5 pF tuning capacitance simplifies impedance matching

Key Features

Feature	Design Value
Two independent interfaces	I²C (wired, byte-addressed) + ISO/IEC 15693 RF (contactless, block-addressed) - enables simultaneous local configuration and remote interrogation
Four-user-memory protection areas	Each area independently secured by up to three 64-bit RF passwords and one 64-bit I²C password - supports tiered access control in multi-role IoT nodes
256-byte Fast Transfer buffer	Volatile mailbox enabling atomic data exchange between RF and I²C domains - eliminates race conditions during firmware updates or sensor log transfers
Configurable GPO events	Programmable interrupt sources (field detect, write complete, Fast Transfer end) - reduces polling overhead and extends host MCU sleep duration
Energy harvesting output (V_E_H)	Analog voltage sourced from RF field - powers external comparators, temperature sensors, or low-threshold logic without battery dependency

Applications

Industrial Asset Tagging

Smart Medical Device Calibration

Use Scenario: RFID-tagged valves, pumps, and gauges in oil & gas facilities undergo periodic NFC scan for maintenance history and calibration expiry.

IC Role / Device Role / Timing Role: Dual-interface tag stores calibration parameters (I²C) and logs usage data (RF), with Fast Transfer synchronizing timestamps across domains.

Use Value: Eliminates manual entry errors and enables offline calibration verification using handheld NFC readers - critical for ASME BPE-compliant systems.

Use Scenario: Infusion pumps store factory calibration coefficients and usage counters, updated via I²C during service and verified remotely via NFC during audits.

IC Role / Device Role / Timing Role: Secure EEPROM holds encrypted calibration data; GPO signals write completion to MCU, ensuring data persistence before power removal.

Use Value: Meets FDA 21 CFR Part 11 requirements for audit trail integrity and tamper-evident storage of calibration metadata.

NFC-Enabled Sensor Nodes

Automotive Aftermarket Diagnostics

Use Scenario: Tire pressure sensors embed ST25DV64K-IER8S3 to store temperature-compensated pressure readings and last-read timestamps accessible via smartphone NFC.

IC Role / Device Role / Timing Role: Energy harvesting (V_E_H) powers local signal conditioning circuitry; RF interface provides read-only access to safety-critical values.

Use Value: Enables battery-free operation for 5+ years in static mounting positions - validated per ISO 21848 for automotive tire electronics.

Use Scenario: OBD-II adapters use the tag to store vehicle-specific DTC mapping tables and firmware revision history, updated via I²C during manufacturing and queried via mechanic's NFC tool.

IC Role / Device Role / Timing Role: Four protected memory areas segregate OEM data, aftermarket updates, diagnostic logs, and security keys - preventing unauthorized firmware modification.

Use Value: Supports UDS (ISO 14229) diagnostic session handshaking and prevents rollback attacks on ECU calibration data.

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-IER8S3	16 Kbit EEPROM (2048 bytes), identical pinout and interface protocol	Limited memory depth for multi-parameter logging or extended firmware metadata storage	Select when application requires only basic parameter storage and lower bill-of-materials cost is prioritized
NXH3670UK/N1Z	NXP HF RFID tag with 2 Kbyte EEPROM, no I²C interface, no Fast Transfer buffer or GPO	Single-interface (RF-only); lacks wired configuration and event-driven host coordination	Choose only for pure passive tag use cases where MCU co-location and real-time synchronization are unnecessary

Compared with ST25DV16K-IER8S3, the ST25DV64K-IER8S3 provides 4× more user memory for complex calibration profiles and firmware signatures; versus NXH3670UK/N1Z, it adds deterministic I²C control, hardware-level security partitioning, and energy harvesting - essential for embedded edge-node architectures.

Availability

ST25DV64K-IER8S3 is available at Aetrix Electronics and suitable for industrial asset tagging, smart medical device calibration, NFC-enabled sensor nodes, and automotive aftermarket diagnostics requiring stable component supply, full lifecycle traceability, and ECOPACK2 RoHS compliance.

Supply support for ST25DV64K-IER8S3 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, MEMS, and secure NFC solutions for industrial, automotive, and consumer markets.

The ST25DVxxx series targets secure, dual-interface data exchange in resource-constrained environments - engineered for battery-free operation, cryptographic memory partitioning, and seamless integration between wired infrastructure and contactless ecosystems.

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 harvested from the RF field, active only when field strength exceeds threshold and energy harvesting mode is enabled. It provides up to 3.3 V open-circuit output with ~1 mA short-circuit current capability - sufficient to power low-quiescent-current comparators, thermistors, or reset supervisors, but not intended for driving LEDs or logic gates directly.

How does memory protection work across I²C and RF interfaces?

User memory is divided into four configurable areas, each protected by up to three independent 64-bit RF passwords and one 64-bit I²C password. Access control is enforced per interface: RF commands respect area boundaries and password checks before read/write; I²C commands require successful password authentication before modifying ENDA registers or accessing protected zones - preventing cross-interface privilege escalation.

Can the GPO pin operate without external pull-up resistors?

No. The ST25DV64K-IER8S3 variant features an open-drain GPO output requiring an external pull-up resistor ≥4.7 kΩ to V_CC. Without this resistor, GPO remains floating and cannot assert valid logic-low interrupts. CMOS-output variants (e.g., ST25DV64K-JF) require V_DCG supply and do not need pull-up, but ST25DV64K-IER8S3 does not support V_DCG.

What is the maximum RF read speed, and under what conditions is it achieved?

The maximum RF read speed is 53 Kbit/s, achieved using the "Fast Read Multiple Blocks" command with optimized antenna coupling and field strength ≥5 A/m. This speed applies only to contiguous block reads (not single-block) and requires the RF reader to support ISO/IEC 15693 high-data-rate mode - standard NFC smartphones typically operate at 26 Kbit/s due to protocol overhead and field limitations.

ST25DV64K-IER8S3 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: ST25D

Package/Case:: 8-SOIC (0.154", 3.90mm 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 ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

ST25DV64K-IER8S3 FAQ

1.How can I place an order for ST25DV64K-IER8S3 through Aetrix?

Please submit a Request for Quotation (RFQ) for ST25DV64K-IER8S3 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 ST25DV64K-IER8S3 reliable?

The price and inventory of ST25DV64K-IER8S3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST25DV64K-IER8S3 is usually 5 days.

3.What payment methods are accepted for ST25DV64K-IER8S3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST25DV64K-IER8S3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ST25DV64K-IER8S3?

ST25DV64K-IER8S3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ST25DV64K-IER8S3 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 ST25DV64K-IER8S3?

For technical support, including ST25DV64K-IER8S3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST25DV64K-IER8S3 requirements.

6.How does Aetrix verify that ST25DV64K-IER8S3 is sourced from the original manufacturer or authorized distributors?

All ST25DV64K-IER8S3 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 ST25DV64K-IER8S3 meets industry standards.

7.What is the process for return or replacement of ST25DV64K-IER8S3?

All ST25DV64K-IER8S3 units undergo pre-shipment inspection (PSI). If there is an issue with ST25DV64K-IER8S3, 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 ST25DV64K-IER8S3 part is unused and in its original packaging.

Return procedure for ST25DV64K-IER8S3:

1.Submit a request within 90 days.

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

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