## Technical Overview: M95320-RMB3TG/P The **M95320-RMB3TG/P** is a high-performance, low-voltage **Serial SPI EEPROM** (Electrically Erasable Programmable Read-Only Memory) manufactured by STMicroelectronics. It is designed for applications requiring non-volatile storage with high endurance and data retention. --- ### 1. Key Technical Specifications | Parameter | Value / Detail | | :--- | :--- | | **Memory Size** | 32 Kbit (4,096 bytes x 8 bits) | | **Interface** | SPI (Serial Peripheral Interface) | | **Supply Voltage (Vcc)** | 1.8V to 5.5V (Wide Range) | | **Max Clock Frequency** | 20 MHz (at 4.5V - 5.5V) / 5 MHz (at 1.8V) | | **Page Size** | 32 Bytes | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | UFDFPN8 (Ultra-thin Fine pitch Dual Flat No-lead) | --- ### 2. Functional Electronic Parts & Features The internal architecture and external pinout are designed for high-speed data integrity: * **Memory Array:** Organized as 4096 bytes of 8 bits each. * **Write Protection:** Includes a hardware Write Protect (`/WP`) pin and software programmable block protection (Quarter, Half, or Whole memory). * **Instruction Set:** Supports standard SPI opcodes (WREN, WRDI, RDSR, WRSR, READ, WRITE). * **Write Cycle:** Self-timed write cycle (typically 5ms) with an internal logic controller that handles the erasing/programming sequence. * **Endurance:** Guaranteed 4 million write cycles, making it suitable for frequent data logging. * **Data Retention:** Up to 200 years. --- ### 3. Part Number Breakdown (M95320-RMB3TG/P) The suffix provides specific details about the physical and chemical properties of the component: * **M95320:** 32 Kbit Serial SPI EEPROM. * **-R:** Operating Voltage range of 1.8V to 5.5V. * **MB:** Package type UFDFPN8 (2x3 mm). * **3:** Device Grade 3 (Operating temperature -40 to +125 °C). * **TG:** Tape & Reel packing / RoHS compliant (Green). * **/P:** Specific process technology or specialized finishing (often related to lead-free/halogen-free standards). --- ### 4. Typical Application Circuit In a digital circuit, the device interacts with a Microcontroller (MCU) as follows: ```cpp // Typical SPI Pin Mapping MCU_MOSI --> SDI (Serial Data In) MCU_MISO <-- SDO (Serial Data Out) MCU_SCK --> C (Serial Clock) MCU_CS --> S (Chip Select) VCC --> 1.8V - 5.5V GND --> 0V ```