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The ST25DV04K-IER6C3 is a dynamic NFC (Near Field Communication) tag IC that combines an NFC interface with EEPROM memory. It is designed to facilitate wireless data transfer and can operate in various modes, including read, write, and emulate a passive NFC card. This device is particularly useful in applications needing RFID functionality and secure data storage. Functions 1. NFC Interface: The chip supports the NFC Forum Type 5 Tag, allowing it to communicate with NFC-enabled devices. 2. EEPROM Memory: It has 4 Kbits of EEPROM memory that can be accessed via NFC, enabling dynamic read/write operations. 3. Energy Harvesting: The device can power itself from the RF field generated by the NFC reader, which allows it to operate without a battery. 4. Data Protection: Features built-in security mechanisms, including password protection and secure access to data. Applications 1. Mobile Payment Systems: Can be used in payment cards or mobile phones for conducting secure transactions. 2. Smart Packaging: Provides the ability to store product-related data that can be retrieved by using NFC-enabled smartphones. 3. Asset Tracking: NFC tags can be attached to assets for easy identification and tracking through smartphones. 4. Access Control: Utilized in secure entry systems where NFC-enabled credentials need to be read by a reader. Alternative Parts - ST25DV16K: A similar chip with 16 Kbits of EEPROM memory. - M24LR16E: An alternative NFC/RFID tag IC with 16 Kbits of EEPROM that supports I2C and RF communication. - NTAG21x series: A family of NFC tags from NXP that may offer similar functionalities for certain applications. Embedded Modules Several modules may integrate the ST25DV04K-IER6C3 chip, including development kits and NFC reader modules that can connect to microcontrollers or processors for prototyping. Look for modules that provide: - NFC reader/writer capability. - Integration with GPIO for easy microcontroller interfacing. - SDKs or libraries that simplify the development process. Related Q&A 1. Q: What are the key features of the ST25DV04K-IER6C3? - A: The ST25DV04K-IER6C3 features a 4 Kbit EEPROM, NFC Forum Type 5 compliance, energy harvesting, and built-in data protection mechanisms. 2. Q: In which applications would I use the ST25DV04K-IER6C3? - A: It is commonly used in mobile payment systems, smart packaging for product information, asset tracking, and secure access control systems. 3. Q: Can the ST25DV04K-IER6C3 operate without a battery? - A: Yes, it can harvest energy from the RF field of an NFC reader, allowing it to function without a battery. 4. Q: What alternatives exist to the ST25DV04K-IER6C3? - A: Alternatives include the ST25DV16K with more EEPROM memory, the M24LR16E, and the NTAG21x series from NXP. 5. Q: Does the ST25DV04K-IER6C3 support secure data access? - A: Yes, it has built-in security features, including password protection, which helps secure access to the stored data.