The **M95080-RMB3** is a specific variant of an 8-Kbit serial SPI (Serial Peripheral Interface) EEPROM manufactured by STMicroelectronics. It is designed for low-voltage applications and high-reliability data storage. ### 1. Key Technical Specifications The following table summarizes the primary electrical and performance characteristics of the device: | Feature | Specification | | :--- | :--- | | **Memory Size** | 8 Kbit (1024 x 8 bits) | | **Interface** | SPI (Mode 0 and Mode 3) | | **Clock Frequency** | Up to 20 MHz | | **Operating Voltage (Vcc)** | 1.8V to 5.5V (Low Voltage range) | | **Operating Temperature** | -40°C to +125°C (Automotive Grade 3) | | **Package Type** | UFDFPN8 (Ultra-thin Fine-pitch Dual Flat No-lead) | | **Write Cycle Time** | 5 ms (Max) | --- ### 2. Detailed Pinout Description The M95080-RMB3 typically comes in an 8-pin package. Below is the standard pin configuration: | Pin Name | Function | Description | | :--- | :--- | :--- | | **S (CS)** | Chip Select | Activates the device when pulled Low. | | **D (MOSI)** | Serial Data Input | Receives instructions, addresses, and data. | | **Q (MISO)** | Serial Data Output | Sends data out during read operations. | | **C (SCK)** | Serial Clock | Provides the timing for data synchronization. | | **W (WP)** | Write Control | Hardware protection against unauthorized writes. | | **HOLD** | Hold | Pauses communication without resetting the CS state. | | **Vcc / Vss** | Power / Ground | Supply voltage and reference ground. | --- ### 3. Functional Features * **Byte and Page Write:** Supports writing a single byte or a full page (up to 32 bytes) in one operation. * **Hardware & Software Protection:** Includes a Write Enable Latch (WEL) bit and a Status Register with Block Protection (BP) bits to prevent accidental data overwriting. * **High Endurance:** Rated for **4 million write cycles** and **200-year data retention**, making it suitable for industrial and automotive logging. * **Low Power Consumption:** Optimized for battery-powered devices with low standby and active current. ### 4. Part Number Breakdown: `M95080-RMB3TG` Understanding the suffix helps identify specific environmental and packaging traits: * **M95080:** Family/Density (8 Kbit SPI). * **-R:** Voltage range (1.8V to 5.5V). * **MB:** Package (UFDFPN8 2x3 mm). * **3:** Range 3 temperature grade (-40 to +125°C). * **TG:** Tape and Reel packaging (standard for automated assembly). --- ### 5. Implementation Example (SPI Logic) To write to the device, the following SPI sequence is required: ```c // Pseudo-code for Write Enable (WREN) 1. Pull CS Low 2. Send Instruction Byte: 0x06 (WREN) 3. Pull CS High // Pseudo-code for Write Data 1. Pull CS Low 2. Send Instruction Byte: 0x02 (WRITE) 3. Send 16-bit Address: (0x0000 - 0x03FF) 4. Send Data Byte(s) 5. Pull CS High (Triggers internal write cycle) ```