## Technical Overview: M95320-RMB3T/P The **M95320-RMB3T/P** is a high-performance, low-voltage **Serial Peripheral Interface (SPI)** Electrically Erasable Programmable Read-Only Memory (EEPROM). It is manufactured by STMicroelectronics and is commonly used for parameter storage in mobile devices, medical equipment, and industrial electronics. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Memory Size** | 32 Kbit (4,096 bytes) | | **Memory Type** | EEPROM | | **Interface** | SPI (Serial Peripheral Interface) | | **Clock Frequency** | Up to 20 MHz | | **Operating Voltage** | 1.8V to 5.5V | | **Operating Temperature** | -40°C to +125°C | | **Write Cycle Time** | 5 ms (Maximum) | | **Package Type** | UFDFPN8 (Ultra-thin Fine pitch Dual Flat No-lead) | --- ### 2. Part Number Breakdown Understanding the suffix codes helps identify the specific physical and environmental characteristics: * **M95320**: Device family (32 Kbit SPI EEPROM). * **-R**: Operating voltage range (1.8V to 5.5V). * **MB**: Package type (UFDFPN8, also known as MLP 2x3mm). * **3**: Temperature range (Grade 3: -40 to +125 °C). * **T**: Packing (Tape & Reel). * **P**: Process technology (Refers to the ST "G" series process / Lead-free). --- ### 3. Electronic Architecture & Pins The device uses an 8-pin configuration designed for high-speed data transfer and low power consumption. #### Pin Configuration | Pin | Name | Function | | :--- | :--- | :--- | | 1 | **S#** | Chip Select (Active Low) | | 2 | **Q** | Serial Data Output | | 3 | **W#** | Write Control (Hardware protection) | | 4 | **VSS** | Ground | | 5 | **D** | Serial Data Input | | 6 | **C** | Serial Clock | | 7 | **HOLD#** | Pause communication without deselecting | | 8 | **VCC** | Supply Voltage | --- ### 4. Core Features * **Byte and Page Write:** Supports writing a single byte or a full page (up to 32 bytes) at once. * **Write Protection:** Includes software-protected blocks and hardware protection via the `W#` pin. * **Endurance:** Guaranteed for more than **4 million write cycles**. * **Data Retention:** Rated for more than **200 years**, making it highly reliable for long-term storage. * **Low Power Consumption:** Optimized for battery-powered applications with minimal standby current. ---