The **M93C46-RBN6** is a 1-Kbit low-voltage serial EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured primarily by STMicroelectronics. It is widely used for storing configuration data, calibration constants, and device parameters. --- ## 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Memory Size** | 1 Kbit (1,024 bits) | | **Organization** | Configurable: 64 x 16-bit or 128 x 8-bit | | **Interface** | MICROWIRE (3-wire serial interface) | | **Operating Voltage** | 1.8V to 5.5V | | **Clock Frequency** | Up to 2 MHz (at 5V) | | **Package Type** | PDIP8 (Plastic Dual In-line Package, 8 pins) | | **Operating Temp** | -40°C to +85°C (Industrial Grade) | --- ## 2. Pin Configuration (PDIP8) The device follows a standard 8-pin layout common to the 93C series: 1. **S (Chip Select):** Enables the device for communication. 2. **C (Serial Clock):** Synchronizes the data transfer. 3. **D (Serial Data Input):** Receives instructions and data. 4. **Q (Serial Data Output):** Sends data to the microcontroller. 5. **Vss:** Ground. 6. **ORG (Organization):** Sets the memory architecture (High = x16, Low = x8). 7. **DU (Do Not Use):** No internal connection. 8. **Vcc:** Power supply. --- ## 3. Core Features ### A. Memory Organization The **ORG** pin allows the user to choose how the 1024 bits are structured. If ORG is connected to $V_{cc}$, the memory is accessed as 64 words of 16 bits. If connected to $V_{ss}$, it acts as 128 bytes of 8 bits. ### B. Write Protection The device includes a **Write Enable (WEN)** and **Write Disable (WDS)** instruction set. This prevents accidental data corruption during power-up or power-down cycles. ### C. Endurance and Retention * **Endurance:** Guaranteed for 1 million write cycles. * **Data Retention:** Rated for over 40 years, making it highly reliable for long-term storage. --- ## 4. Part Number Breakdown The suffix **-RBN6** provides specific details about the manufacturing version: * **M93C46**: Base model (1 Kbit Microwire EEPROM). * **-R**: Range of 1.8V to 5.5V (Low Voltage). * **B**: Die revision or specific process technology. * **N**: PDIP8 package. * **6**: Industrial temperature range (-40 to +85 °C). --- ## 5. Typical Applications * **Consumer Electronics:** Storing user settings on TVs or appliances. * **Networking:** MAC addresses and configuration in routers. * **Industrial:** Calibration data for sensors and instrumentation.