The **M93C86-RDS3G/S** is a specific variant of the 16-Kbit serial Microwire EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by STMicroelectronics. It is widely used in automotive and industrial applications for non-volatile data storage. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Memory Size** | 16 Kbit (2048 x 8 bits or 1024 x 16 bits) | | **Interface** | Microwire (3-wire serial interface) | | **Operating Voltage** | 1.8V to 5.5V | | **Clock Frequency** | Up to 2 MHz | | **Package Type** | TSSOP8 (Thin Shrink Small Outline Package) | | **Temperature Range** | -40°C to +125°C (Automotive Grade 1) | | **Endurance** | 4 million write cycles | | **Data Retention** | 200 years | --- ### 2. Pin Configuration (TSSOP8) The device typically uses an 8-pin layout. Below are the functional descriptions of the pins: | Pin Name | Function | Description | | :--- | :--- | :--- | | **S** | Chip Select | Activates the device when High. | | **D** | Serial Data Input | Used to transfer addresses and data into the device. | | **Q** | Serial Data Output | Used to read data out of the device. | | **C** | Serial Clock | Synchronizes the data transfer. | | **ORG** | Organization | Selects internal organization (x8 or x16). | | **VCC/VSS** | Power Supply | Voltage supply and Ground. | --- ### 3. Part Number Breakdown: `M93C86-RDS3G/S` To understand the specific features of this component, we decode the suffix: * **M93C86**: Base part number for the 16-Kbit Microwire EEPROM. * **-R**: Indicates the device operates at a low voltage range (**1.8V to 5.5V**). * **DS**: Refers to the **TSSOP8** package (8-pin, 3x4.4mm). * **3**: Indicates the temperature range is **Grade 3** (-40 to +125°C). * **G**: Denotes **ECOPACK2** (RoHS compliant, Halogen-free). * **S**: Often refers to specialized sorting or **Automotive Grade** qualification (AEC-Q100 compliance). --- ### 4. Core Features & Use Cases * **Self-Timed Programming:** The device handles the internal write cycle automatically, so the MCU doesn't need to manage the timing. * **User-Definable Organization:** By setting the **ORG** pin, the memory can be accessed as either 8-bit bytes or 16-bit words. * **Sequential Read:** Allows for reading the entire memory contents in a single continuous stream. * **Common Applications:** * Storing calibration data in automotive ECUs. * Storing odometer readings or VIN information. * Parameter storage in industrial sensors. ---