The **M24LR64-R-MB6T/2** is a unique electronic component categorized as a **Dual Interface EEPROM**. It is designed to bridge the gap between contact-based communication (I2C) and contactless communication (RFID/NFC). --- ### 1. Key Technical Specifications Below are the primary electrical and functional characteristics: | Feature | Specification | | :--- | :--- | | **Memory Size** | 64 Kbits (8192 bytes) | | **Contact Interface** | Two-wire I2C (up to 400 kHz) | | **Contactless Interface** | ISO 15693 / ISO 18000-3 Mode 1 (13.56 MHz) | | **Operating Voltage** | 1.8V to 5.5V | | **Retention** | 40 Years | | **Endurance** | 1,000,000 Write Cycles | | **Package** | TSSOP8 (MB6T suffix) | --- ### 2. Functional Architecture The device acts as a shared memory space that can be accessed by two different masters: #### I2C Interface (Wired) Used by a local microcontroller (MCU) on a PCB. This allows the system to log data, store configuration settings, or update firmware parameters locally. #### RF Interface (Wireless) Compliant with NFC Forum Type 5 tags. It can be powered entirely by the RF field generated by an external reader or a smartphone. This allows for: * Reading/Writing data while the device is powered off. * Zero-power configuration of devices in the box. #### Energy Harvesting One of the most notable features is the **Analog Output (Vout)** pin. When placed in a strong enough induction field from an NFC reader, the chip can harvest energy and output a small voltage to power an external low-power MCU or sensor. --- ### 3. Application Examples ```cpp // Logic flow for a typical system using M24LR64 1. MCU writes "System Status: OK" to EEPROM via I2C. 2. Device is powered off and shipped. 3. Customer uses an NFC Smartphone to read the tag. 4. The M24LR64 wakes up via RF field, providing the status to the phone. ``` * **Industrial:** Asset tracking and maintenance logs accessible via mobile devices. * **Consumer Electronics:** Bluetooth pairing or Wi-Fi configuration via a simple "tap." * **Medical:** Data logging for portable sensors where battery life is critical. --- ### 4. Pin Configuration (TSSOP8) 1. **E0, E1**: Chip Enable (I2C Address inputs). 2. **VSS**: Ground. 3. **SDA**: Serial Data (I2C). 4. **SCL**: Serial Clock (I2C). 5. **Vout**: Energy Harvesting output. 6. **AC0 / AC1**: Antenna connections (to the induction coil). 7. **VCC**: Power Supply. ---