## Technical Overview: M93C86-RMB7TP The **M93C86-RMB7TP** is a specific variant of the 16-Kbit serial Microwire EEPROM manufactured by **STMicroelectronics**. It is widely used for non-volatile data storage in applications requiring low power consumption and small footprints. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Memory Size** | 16 Kbit (2,048 x 8 bits or 1,024 x 16 bits) | | **Interface** | Microwire (3-wire serial) | | **Operating Voltage** | 1.8V to 5.5V | | **Clock Frequency** | 2 MHz (at 4.5V - 5.5V) | | **Package Type** | UFDFPN8 (Ultra-thin Fine pitch Dual Flat No-lead) | | **Temperature Range** | -40°C to +105°C (Grade 7) | | **Endurance** | 4 million write cycles | | **Data Retention** | 200 Years | --- ### 2. Breakdown of the Part Number The suffix **-RMB7TP** provides specific details about the physical and chemical properties of the chip: * **M93C86**: Base part number (16 Kbit Microwire EEPROM). * **-R**: Indicates the operating voltage range (1.8 V to 5.5 V). * **MB**: Represents the package code (**UFDFPN8** 2x3 mm). * **7**: Indicates the operating temperature range (**Grade 7**: -40 to +105 °C). * **T**: Indicates the delivery method (**Tape & Reel**). * **P**: Indicates the manufacturing process/material (RoHS compliant, Halogen-free). --- ### 3. Electronic Functionality #### Memory Organization The device can be configured to operate in either **8-bit** or **16-bit** mode depending on the logic level applied to the **ORG** (Organization) pin: * **ORG at VCC:** 1024 words of 16 bits each. * **ORG at GND:** 2048 words of 8 bits each. #### The Microwire Interface Unlike I2C or SPI, the Microwire interface utilizes a simple 3-wire protocol consisting of: 1. **S (Chip Select):** Initiates communication when high. 2. **D (Serial Data Input):** Receives instructions and data. 3. **Q (Serial Data Output):** Sends data back to the microcontroller. 4. **C (Serial Clock):** Synchronizes data transfer. --- ### 4. Typical Applications * **Automotive:** Storing calibration data and odometer settings (due to the -40 to +105°C range). * **Industrial:** Configuration storage in sensors and controllers. * **Consumer Electronics:** Settings retention in appliances and smart devices. ---