## Technical Overview of M23LR64-R-MB6T/2 The **M23LR64-R-MB6T/2** is a sophisticated Dual-Interface EEPROM IC developed by STMicroelectronics. It is designed to act as a bridge between wireless NFC/RFID communication and standard wired I2C interfaces. ### Core Specifications | Parameter | Specification | | :--- | :--- | | **Memory Size** | 64 Kbits (8192 bytes) | | **Interface 1** | I2C (Serial) | | **Interface 2** | ISO 15693 / ISO 18000-3 Mode 1 (RF) | | **RF Operating Frequency** | 13.56 MHz | | **Supply Voltage (Vcc)** | 1.8V to 5.5V | | **Package Type** | TSSOP8 | | **Energy Harvesting** | Yes (Analog output pin) | | **Data Retention** | 40 Years | --- ### Key Electronic Features #### 1. Dual Interface Access The chip allows data to be read or written via two distinct paths: * **Contactless (RF):** Accessed through an external antenna connected to the AC0 and AC1 pins. It operates at 13.56 MHz. * **Contact (I2C):** A standard two-wire industrial interface for communication with a microcontroller (MCU). #### 2. Energy Harvesting Mode One of the most unique features is the **Vout pin**. When the device is placed in an induction field (from an NFC phone or RFID reader), it can harvest the electromagnetic energy and output a small voltage to power external components, such as a low-power MCU or a sensor. #### 3. Configurable Password Protection The memory is divided into sectors. You can apply 32-bit password protection to prevent unauthorized reading or writing via the RF interface, ensuring data security for sensitive information. #### 4. RF Status Pin (RF WIP/BUSY) The device includes a dedicated pin to signal the MCU when an RF operation is in progress. This prevents data collisions between the I2C and RF interfaces. --- ### Pin Configuration (TSSOP8) | Pin # | Name | Description | | :--- | :--- | :--- | | 1 | **AC0** | Antenna connection | | 2 | **AC1** | Antenna connection | | 3 | **Vout** | Energy harvesting output | | 4 | **Vss** | Ground | | 5 | **SDA** | I2C Data | | 6 | **SCL** | I2C Clock | | 7 | **RF WIP/BUSY** | RF activity indicator | | 8 | **Vcc** | Power Supply | --- ### Common Applications * **Industrial Automation:** Updating configuration parameters via a smartphone without powering on the machine. * **Medical Devices:** Storing patient logs or calibration data that can be read through a sealed plastic casing. * **Consumer Electronics:** Bluetooth pairing or Wi-Fi handoff using NFC. * **Smart Labels:** Electronic Shelf Labels (ESL) where energy harvesting helps drive a small display.