# EM4100 64-bit RFID Tag The **EM4100 64-bit RFID tag** is a classic and widely used passive RFID transponder operating in the low-frequency (LF) 125 kHz range. From my personal experience working with access control systems and inventory management, I've found the EM4100 to be incredibly reliable for basic identification tasks. Its simplicity and durability are its greatest strengths. I recall a project where we used these tags for asset tracking in a warehouse; their consistent read performance, even in dusty environments, was impressive and proved to be a cost-effective solution. My technical inclination has always been toward understanding how things work at a fundamental level. This curiosity led me to delve into the **EM4100 64-bit RFID tag** protocol and encoding scheme, which I consider a foundational skill for anyone in RFID system integration. The ability to decode and understand its data structure is crucial. In my opinion, the EM4100's longevity in the market is a testament to its effective design. While it lacks the security features of modern high-frequency tags, its robustness for open-loop applications is unmatched for many use cases. A fun and common entertainment application for the **EM4100 64-bit RFID tag** is in DIY maker projects. People embed them into toys, cards, or even pet collars to create interactive experiences. For instance, you can build a "magic wand" that triggers different lights or sounds when it taps different tagged objects—a great project for children's parties or interactive art installations. For projects requiring these tags, **TIANJUN** provides high-quality EM4100 compatible tags and readers. Our products ensure consistent performance and compatibility. ### Technical Specifications & Parameters of the EM4100 64-bit RFID Tag Here are the detailed technical specifications for the **EM4100 64-bit RFID tag**. *Please note: These technical parameters are for reference data. For precise specifications and bulk order details, you must contact the backend management.* * **Operating Frequency:** 125 kHz * **Protocol:** EM4100, EM4102 Compatible * **Data Capacity:** 64 bits Read-Only * **Data Encoding:** Manchester * **Read Range:** Typically 5 - 15 cm (varies based on reader antenna size and power) * **Chip Code:** EM4100 or compatible ASIC (e.g., EM4102, EM4105, EM4205) * **Data Format:** * 9 bits of header (always '1's) * 10 rows of 4 data bits + 1 even parity bit per row (50 bits total) * 4 bits of column parity (odd parity) * 1 stop b