The **M93C86-RMB3G** is a high-reliability, low-voltage serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It is manufactured by STMicroelectronics and is commonly used for parameter storage in automotive and industrial applications. --- ## 1. Technical Specifications Below are the primary electronic characteristics of the M93C86-RMB3G: | Parameter | Specification | | :--- | :--- | | **Memory Size** | 16 Kbit (2,048 x 8 bits or 1,024 x 16 bits) | | **Interface** | MICROWIRE (3-wire Serial) | | **Operating Voltage (Vcc)** | 1.8V to 5.5V | | **Clock Frequency** | 2 MHz (at 4.5V - 5.5V) | | **Package Type** | UFDFPN8 (MLP8) - Ultra-thin Fine pitch Dual Flat No-lead | | **Temperature Range** | -40°C to +125°C (Automotive Grade 3) | | **Write Cycles** | 4,000,000 Cycles (High Endurance) | | **Data Retention** | 200 Years | --- ## 2. Pin Configuration The device usually comes in an 8-pin package. The functions are defined as follows: 1. **S (Chip Select):** Activates the device when held high. 2. **D (Serial Data Input):** Receives instructions and data. 3. **Q (Serial Data Output):** Transmits data to the microcontroller. 4. **C (Serial Clock):** Synchronizes the data transfer. 5. **ORG (Organization Select):** Sets the memory architecture (x8 or x16). 6. **Vcc/Vss:** Power supply and Ground. 7. **DU/NC:** Do not use or No connection. --- ## 3. Key Electronic Features ### A. Flexible Organization The **ORG** pin allows the user to define how the 16 Kbits are addressed: * **ORG at Vcc:** 1024 words of 16 bits each. * **ORG at Vss (or floating):** 2048 words of 8 bits each. ### B. High Reliability The "R" in the part number signifies a specific voltage range, and the "3" indicates it is qualified for **Automotive Grade 3**. It includes an internal "Write-in-progress" polling feature to ensure the microcontroller knows when the self-timed write cycle is complete. ### C. Low Power Consumption Designed for battery-operated or energy-efficient systems, it features: * **Active Read Current:** < 1 mA * **Standby Current:** < 1 µA (at 1.8V) --- ## 4. Part Number Breakdown The suffix **RMB3G** provides specific information about the physical and chemical properties: * **RM:** Indicates the 1.8V to 5.5V operating range. * **MB:** Specifies the **UFDFPN8** (2x3 mm) package. * **3:** Automotive Grade temperature range (-40°C to 125°C). * **G:** ECOPACK2 (RoHS compliant and Halogen-free). ---