The **M95640-RBN6TP** is a specific type of Non-Volatile Memory (NVM) manufactured by **STMicroelectronics**. It belongs to the SPI (Serial Peripheral Interface) EEPROM family. ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Memory Size** | 64 Kbit (8,192 x 8 bits) | | **Interface** | SPI (Serial Peripheral Interface) | | **Operating Voltage** | 1.8V to 5.5V | | **Clock Frequency** | 20 MHz (max) | | **Package Type** | PDIP8 (Plastic Dual-In-Line) | | **Temperature Range** | -40°C to +85°C | | **Write Cycles** | 4 Million cycles (approx.) | | **Data Retention** | 200 Years | --- ### 2. Functional Description The M95640-RBN6TP acts as a storage bridge for microcontrollers that need to save configuration data, calibration constants, or user settings even when power is removed. * **SPI Modes:** It supports SPI modes 0 $(0,0)$ and 3 $(1,1)$. * **Page Write:** It allows writing up to 32 bytes in a single instruction cycle. * **Protection:** It features a Status Register that allows for hardware and software data protection (Write Protect pin and Block Protection bits). * **Instruction Set:** Uses standard SPI opcodes for `READ`, `WRITE`, `WREN` (Write Enable), and `RDSR` (Read Status Register). --- ### 3. Pinout Configuration The device typically follows the standard 8-pin EEPROM pinout: | Pin Number | Symbol | Description | | :--- | :--- | :--- | | 1 | **S#** | Chip Select (Active Low) | | 2 | **Q** | Serial Data Output (MISO) | | 3 | **W#** | Write Control | | 4 | **Vss** | Ground | | 5 | **D** | Serial Data Input (MOSI) | | 6 | **C** | Serial Clock | | 7 | **HOLD#** | Pause Communication | | 8 | **Vcc** | Supply Voltage | --- ### 4. Part Number Breakdown Understanding the suffix codes for the **M95640-RBN6TP**: * **M95640**: 64 Kbit SPI EEPROM. * **-R**: Range of operating voltage (1.8V to 5.5V). * **BN**: Package code for PDIP8 (Plastic Dual-in-line). * **6**: Industrial temperature range (-40 to 85°C). * **TP**: Tape and Reel packaging. ---