## M95020-RBN3G: Electronic Specifications and Overview The **M95020-RBN3G** is a 2-Kbit serial SPI (Serial Peripheral Interface) EEPROM manufactured by STMicroelectronics. It is designed for low-power and low-voltage applications, commonly used for parameter storage in consumer electronics and industrial devices. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Memory Size** | 2 Kbit (256 x 8 bits) | | **Interface** | SPI (Mode 0 and Mode 3) | | **Clock Frequency** | Up to 20 MHz | | **Operating Voltage ($V_{CC}$)** | 1.8V to 5.5V | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | SOT23-5 (indicated by "BN") | | **Write Cycle Time** | 5 ms (Max) | | **Endurance** | 4 million write cycles | | **Data Retention** | 200 years | --- ### 2. Pin Configuration (SOT23-5) The "BN" in the part number indicates a SOT23-5 package. Below is the typical pinout: | Pin Number | Name | Description | | :--- | :--- | :--- | | 1 | **W** | Write Protect (active low) | | 2 | **$V_{SS}$** | Ground | | 3 | **D** | Serial Data Input (MOSI) | | 4 | **$V_{CC}$** | Supply Voltage | | 5 | **S** | Chip Select (active low) | | 6* | **C** | Serial Clock (SCK) | | 7* | **Q** | Serial Data Output (MISO) | *\*Note: In ultra-compact SOT23 packages, some pins may be multiplexed or the pin count may lead to specific wiring requirements. Always refer to the specific ST datasheet for the RBN3G layout.* --- ### 3. Core Functional Features * **Instruction Set:** The device supports standard SPI instructions: * `WREN`: Write Enable * `WRDI`: Write Disable * `RDSR`: Read Status Register * `WRSR`: Write Status Register * `READ`: Read Data from Memory * `WRITE`: Write Data to Memory * **Write Protection:** Includes a hardware Write Protect pin and software block protection bits (BP0, BP1) within the status register to prevent accidental data overwrites. * **Byte and Page Write:** Supports writing a single byte or a full page (16 bytes) in a single cycle. --- ### 4. Part Number Breakdown Understanding the suffix **RBN3G**: * **M95020**: Base Part Number (2 Kbit SPI EEPROM). * **R**: Operating voltage range (1.8V to 5.5V). * **BN**: Package type (SOT23-5). * **3**: Temperature range (-40 to +125 °C). * **G**: ECOPACK2 (RoHS compliant/Lead-free).