The **M95320-RDL6** is a 32-Kbit serial SPI (Serial Peripheral Interface) EEPROM manufactured by STMicroelectronics. It is designed for high-reliability applications requiring low-voltage operation and non-volatile data storage. --- ### ## 1. Key Specifications | Feature | Specification | | :--- | :--- | | **Memory Size** | 32 Kbit (4,096 bytes x 8 bits) | | **Interface** | SPI (Mode 0 and Mode 3 supported) | | **Clock Frequency** | Up to 20 MHz (at 4.5V - 5.5V) | | **Operating Voltage** | 1.8V to 5.5V (The "R" in the part number indicates 1.8V min) | | **Package Type** | MLP / DFN8 (2x3 mm) - Ultra thin | | **Operating Temp** | -40°C to +85°C | | **Write Cycles** | 4 Million cycles | | **Data Retention** | 200 Years | --- ### ## 2. Pin Configuration (DFN8 Package) The device typically follows the standard SPI EEPROM pinout: | Pin | Name | Description | | :--- | :--- | :--- | | 1 | **/S** | Chip Select (Active Low) | | 2 | **Q** | Serial Data Output (MISO) | | 3 | **/W** | Write Protect (Hardware protection) | | 4 | **Vss** | Ground | | 5 | **D** | Serial Data Input (MOSI) | | 6 | **C** | Serial Clock | | 7 | **/HOLD** | Pauses communication without resetting | | 8 | **Vcc** | Supply Voltage | --- ### ## 3. Core Functional Features * **Byte and Page Write:** Allows writing a single byte or a full page (up to 32 bytes) in one instruction. * **Write Protection:** * *Software:* Block protection via Status Register (Quarter, Half, or Entire memory). * *Hardware:* Dedicated Write Protect pin (/W). * **Clock Speed:** While it supports 20 MHz at 5V, the speed is usually derated (e.g., 5 MHz or 10 MHz) when operating at the lower 1.8V limit. * **Self-Timed Write Cycle:** The internal write cycle takes approximately 5ms, during which the device ignores most commands except status polling. --- ### ## 4. Part Number Breakdown: M95320-RDL6 | Code | Meaning | | :--- | :--- | | **M95** | SPI Family EEPROM | | **320** | 32 Kbit Density | | **-R** | Voltage range: 1.8V to 5.5V | | **DL** | Package: MLP8 / DFN8 (Dual Flat No-lead) | | **6** | Industrial temperature range (-40°C to +85°C) | --- ### ## 5. Typical Applications * **Consumer Electronics:** Storing calibration data in cameras or smartphones. * **Industrial:** Parameter storage for sensors and controllers. * **Medical:** Traceability data and configuration logs in portable devices.