### Technical Overview: M95128-RBN6TP The **M95128-RBN6TP** is a high-performance, electrically erasable programmable read-only memory (EEPROM) manufactured by STMicroelectronics. It is characterized by its 128-Kbit capacity and high-speed Serial Peripheral Interface (SPI). --- ### Core Specifications The following table outlines the primary electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Memory Size** | 128 Kbit (16,384 x 8 bits) | | **Interface** | SPI (Serial Peripheral Interface) | | **Max Clock Frequency** | 20 MHz (at 4.5V - 5.5V) | | **Operating Voltage** | 1.8V to 5.5V | | **Operating Temperature** | -40°C to +85°C | | **Package Type** | SO8N (Narrow SOIC-8) | | **Write Cycles** | More than 4 million cycles | | **Data Retention** | More than 200 years | --- ### Key Electronic Components & Internal Logic The device consists of several critical functional blocks that manage data flow and storage: #### 1. The Memory Array The 128 Kbit storage is organized as 16,384 bytes. It is divided into **64-byte pages**, allowing for efficient "Page Write" operations where up to 64 bytes can be written in a single command cycle. #### 2. SPI Protocol Logic It operates in SPI Mode 0 (0,0) and Mode 3 (1,1). The communication pins include: * **S (Chip Select):** Activates the device. * **D (Serial Data Input):** Receives instructions, addresses, and data. * **Q (Serial Data Output):** Sends data out to the master controller. * **C (Serial Clock):** Synchronizes data movement. #### 3. Control Logic & Protection * **W (Write Protect):** A hardware pin used to freeze the memory status, preventing accidental overwrites. * **HOLD:** Allows the master to pause communication without resetting the SPI bus. * **Status Register:** Contains bits like **WIP** (Write In Progress) and **WEL** (Write Enable Latch) to monitor the internal state of the chip. --- ### Pinout Configuration | Pin Number | Symbol | Description | | :---: | :--- | :--- | | 1 | S | Chip Select | | 2 | Q | Serial Data Output | | 3 | W | Write Protect | | 4 | VSS | Ground | | 5 | D | Serial Data Input | | 6 | C | Serial Clock | | 7 | HOLD | Hold | | 8 | VCC | Supply Voltage | --- ### Part Number Breakdown (Decoding) Understanding the suffix `RBN6TP`: * **M95128:** Device Family (SPI EEPROM, 128 Kbit). * **-R:** Operating Voltage (1.8V to 5.5V). * **BN:** Package (SO8N, 150 mils width). * **6:** Temperature Grade (Industrial: -40 to 85°C). * **TP:** Packing (Tape and Reel).