The **M95320-RMB3G/B** is a specific variant of a Serial Serial Peripheral Interface (SPI) Electrically Erasable Programmable Read-Only Memory (EEPROM). It is manufactured by **STMicroelectronics**. --- ### 1. Key Technical Specifications This component is designed for low-power applications requiring non-volatile storage. | Feature | Specification | | :--- | :--- | | **Memory Size** | 32 Kbit (4,096 bytes x 8 bits) | | **Interface** | SPI (Serial Peripheral Interface) | | **Clock Frequency** | Up to 10 MHz (at 2.5V - 5.5V) | | **Supply Voltage (Vcc)** | 1.8V to 5.5V | | **Operating Temperature** | -40°C to +125°C (Automotive Grade 3) | | **Package** | UFDFPN8 (Ultra-thin Fine pitch Dual Flat No-lead) | | **Endurance** | 4 million write cycles | | **Data Retention** | 200 years | --- ### 2. Breakdown of the Part Number The alphanumeric suffix provides specific details about the manufacturing and packaging: * **M95320**: Base part number for the 32 Kbit SPI EEPROM family. * **-R**: Indicates the operating voltage range (1.8V to 5.5V). * **MB**: Represents the package type (**UFDFPN8**, 2x3 mm). * **3**: Indicates the operating temperature range (-40°C to +125°C). * **G**: Indicates "ECOPACK2" (RoHS compliant and Halogen-free). * **B**: Often refers to the specific plating or internal revision/process technology (Process letter). --- ### 3. Functional Pinout (UFDFPN8) The device typically follows the standard SPI EEPROM pin configuration: | Pin | Name | Description | | :--- | :--- | :--- | | 1 | **S#** | Chip Select (Active Low) | | 2 | **Q** | Serial Data Output | | 3 | **W#** | Write Protect | | 4 | **Vss** | Ground | | 5 | **D** | Serial Data Input | | 6 | **C** | Serial Clock | | 7 | **HOLD#** | Pause Serial Communication | | 8 | **Vcc** | Supply Voltage | --- ### 4. Core Features * **Byte and Page Write:** Supports writing a single byte or a page of up to 32 bytes at a time. * **Write Protection:** Includes hardware write protection via the `W#` pin and software protection via the Status Register (Block Protect bits). * **High Reliability:** Designed for automotive-grade reliability, making it suitable for under-the-hood modules or industrial controllers where temperature fluctuations are common. ---