The **M93C76-RBN3P** is a specific type of non-volatile memory chip. It belongs to the **Microwire** family of EEPROMs (Electrically Erasable Programmable Read-Only Memory). These chips are commonly used to store small amounts of data that must be preserved when power is removed, such as configuration settings or calibration data. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Memory Size** | 8 Kbit (organized as 1024 x 8-bit or 512 x 16-bit) | | **Interface** | Microwire (Serial 3-Wire) | | **Operating Voltage** | 1.8V to 5.5V (Wide voltage range) | | **Clock Frequency** | Up to 2 MHz | | **Package Type** | PDIP8 (Plastic Dual In-line Package, 8 pins) | | **Operating Temp** | -40°C to +85°C (Industrial Grade) | | **Endurance** | 4 Million Write Cycles | | **Data Retention** | 200 Years | --- ### 2. Part Number Breakdown Understanding the suffix codes helps identify the specific variant: * **M93C76**: The base model/density (8 Kbit). * **-R**: Indicates the device operates at low voltage (1.8V to 5.5V). * **BN**: Refers to the **PDIP8** package (through-hole mounting). * **3**: Indicates the device is certified for the Industrial temperature range (-40°C to +85°C). * **P**: Indicates a RoHS-compliant, Lead-free, and Halogen-free package. --- ### 3. Functional Pins Description The chip uses an 8-pin layout, though not all pins are always active depending on the mode: | Pin | Name | Function | | :--- | :--- | :--- | | **1** | S | Chip Select (Activates the device) | | **2** | C | Serial Clock (Synchronizes data transfer) | | **3** | D | Serial Data Input | | **4** | Q | Serial Data Output | | **5** | Vss | Ground | | **6** | ORG | Organization (Selects x8 or x16 data structure) | | **7** | DU | Don't Use (Leave unconnected) | | **8** | Vcc | Supply Voltage | --- ### 4. Common Applications Due to its reliability and through-hole package (which is easy to solder by hand), the M93C76-RBN3P is often found in: * **Automotive Electronics:** Odometer settings or radio presets. * **Industrial Controls:** Storing parameters for PLC units. * **Consumer Goods:** Storing user preferences in appliances. * **Prototyping:** Used by hobbyists with microcontrollers (Arduino/PIC) because the PDIP package fits into breadboards. ---