RFID

ST25DV64K-IER6S3

ST25DV64K-IER6S3 - 64Kbit Dynamic NFC/RFID Tag IC | STMicroelectronics

The ST25DV64K-IER6S3 is a 64-Kbit dynamic NFC/RFID tag IC from STMicroelectronics, designed for contactless data transfer and energy harvesting in IoT, smart home, and industrial applications. It operates at 13.56 MHz and supports ISO/IEC 15693 and ISO/IEC 18000-3 Mode 1 protocols, with a fast data transfer rate of up to 53 kbit/s. The device is housed in an SO-8 package and features an I2C interface for connection to a host microcontroller, enabling seamless integration into embedded systems. Data verified as of 2026-08-05. What is an NFC/RFID tag IC? An NFC/RFID tag IC is a passive integrated circuit that communicates with an NFC reader or RFID interrogator via radio frequency (RF) signals. It typically contains a memory array, an RF front-end, and a digital control unit. In the system hierarchy, an NFC tag IC falls under RFID transponders, which are part of the broader category of wireless communication devices. These ICs are essential for applications requiring wireless data exchange, such as access control, product authentication, and smart packaging, where they enable battery-less operation by harvesting energy from the reader's RF field. Key features of the ST25DV64K-IER6S3 include a 64-Kbit EEPROM memory organized in 256-byte pages, an I2C interface with a clock frequency of up to 1 MHz, and an energy harvesting function that can supply up to 1 mA to external circuits. The device supports a wide operating temperature range of -40°C to +85°C, making it suitable for industrial environments. It also features a configurable RF field detection output and an interrupt output for event-driven communication with the host MCU. Technically, the ST25DV64K-IER6S3 integrates an RF front-end with a high-sensitivity receiver, enabling reliable communication at distances up to 1.2 meters when used with a suitable antenna. The I2C interface allows the host to read and write the EEPROM memory, while the RF interface provides contactless access. The device includes a password protection mechanism for secure memory access, and its energy harvesting capability can power low-power sensors or charge a small capacitor for intermittent operation. Typical applications include smart home devices (e.g., smart locks, smart appliances), industrial asset tracking, medical device authentication, and consumer electronics pairing. The ST25DV64K-IER6S3 is particularly suited for applications requiring both contactless and wired communication, as it bridges the NFC world with traditional I2C-based systems. When designing with this device, ensure proper antenna matching and tuning to achieve optimal read range. The I2C pull-up resistors should be sized appropriately for the bus capacitance, and the energy harvesting output should be decoupled with a capacitor to stabilize the harvested voltage. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the STMicroelectronics datasheet.