## Technical Overview of the M95128-RMW3P The **M95128-RMW3P** is a high-performance, electrically erasable programmable memory (EEPROM) manufactured by **STMicroelectronics**. It is commonly used in industrial and consumer electronics for non-volatile data storage. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Memory Size** | 128 Kbit (16,384 bytes) | | **Interface** | SPI (Serial Peripheral Interface) | | **Operating Voltage ($V_{CC}$)** | 1.8V to 5.5V | | **Clock Frequency** | Up to 20 MHz (at 4.5V - 5.5V) | | **Page Size** | 64 Bytes | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | MLP8 / DFN8 (Ultra-thin Small Outline) | | **Endurance** | 4 Million Write Cycles | | **Data Retention** | 200 Years | --- ### 2. Pinout Configuration (MLP8 Package) The device typically uses an 8-pin layout to handle power, communication, and write protection. | Pin Number | Name | Function | | :--- | :--- | :--- | | 1 | **$\bar{S}$** | Chip Select (Active Low) | | 2 | **Q** | Serial Data Output | | 3 | **$\bar{W}$** | Write Protect | | 4 | **$V_{SS}$** | Ground | | 5 | **D** | Serial Data Input | | 6 | **C** | Serial Clock | | 7 | **$\bar{HOLD}$** | Hold (Pause communication) | | 8 | **$V_{CC}$** | Supply Voltage | --- ### 3. Functional Features * **SPI Protocol:** It supports SPI modes 0 and 3, allowing for high-speed synchronous data transfer. * **Write Protection:** It features hardware write protection via the $\bar{W}$ pin and software protection through programmable status registers (Block Protection). * **Low Power Consumption:** Optimized for battery-operated devices, with a deep power-down mode and very low standby current. * **Enhanced Reliability:** The device includes a "Write Cycle" monitoring feature and is designed to handle harsh environmental conditions. --- ### 4. Part Number Breakdown: M95128-RMW3P The suffix provides specific details about the manufacturing variant: * **M95:** SPI family of EEPROMs. * **128:** 128 Kbit density. * **R:** Operating voltage range (1.8V to 5.5V). * **MW:** Package code (usually designating the SO8 or DFN variant). * **3:** Range 3 temperature profile (-40 to +125°C). * **P:** RoHS compliant/Lead-free packaging. ---