The **M95320-RMB6G** is a high-performance, 32-Kbit serial SPI (Serial Peripheral Interface) EEPROM (Electrically Erasable Programmable Memory) manufactured by **STMicroelectronics**. Below is a detailed breakdown of its electronic specifications and characteristics. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Memory Size** | 32 Kbit (4,096 bytes x 8 bits) | | **Interface** | SPI (Mode 0 and Mode 3) | | **Max Clock Frequency** | 20 MHz (at VCC > 4.5V); 5 MHz (at 1.8V) | | **Operating Voltage (Vcc)** | 1.8 V to 5.5 V | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Write Cycle Time** | 5 ms (Maximum) | | **Data Retention** | > 100 Years | | **Endurance** | 4 Million Write Cycles | --- ### 2. Package and Part Number Decoding The suffix **RMB6G** provides specific information about the physical build and compliance: * **M95320**: Base Part Number (32 Kbit SPI EEPROM). * **-R**: Indicates the device operates in the **1.8V to 5.5V** range. * **MB**: Represents the **UFDFPN8** package (Ultra-thin Fine pitch Dual Flat No-lead, 2x3 mm). * **6**: Operating temperature range of **-40 to 85°C**. * **G**: Indicates **ECOPACK2** (RoHS compliant and Halogen-free). --- ### 3. Core Functional Features * **Byte and Page Write:** It supports writing a single byte or a page of up to 32 bytes. * **Block Protection:** Hardware and software write protection allows the user to lock quarters, halves, or the entire memory array via the Status Register. * **Hold Pin (`/HOLD`):** Allows pausing serial communication without deselecting the device, which is useful when sharing the SPI bus with other peripherals. * **Write Protect Pin (`/W`):** Provides hardware protection against unintended write instructions. --- ### 4. Typical Application Circuit In a digital circuit, the device is usually wired to a Microcontroller (MCU) as follows: ```cpp // Typical Pin Connection // 1. /S (Chip Select) -> MCU GPIO (Active Low) // 2. Q (Data Out) -> MCU MISO // 3. /W (Write Protect) -> VCC (to disable) or GPIO // 4. VSS (Ground) -> GND // 5. D (Data In) -> MCU MOSI // 6. C (Serial Clock) -> MCU SCK // 7. /HOLD (Hold) -> VCC (if not used) // 8. VCC (Supply) -> 1.8V - 5.5V ``` --- ### 5. Summary of Usage This part is commonly found in consumer electronics, industrial sensors, and medical devices where small-footprint non-volatile storage is required for configuration settings, calibration data, or error logs.