## Technical Overview: M93C86-RDS6TG/S The **M93C86-RDS6TG/S** is a specific variant of the 16-Kbit serial MICROWIRE EEPROM (Electrically Erasable Programmable Memory) manufactured by **STMicroelectronics**. It is widely used for parameter storage in automotive and industrial applications. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Memory Size** | 16 Kbit (2048 x 8 bits or 1024 x 16 bits) | | **Interface** | MICROWIRE (Serial 3-Wire) | | **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 +85°C (Industrial Grade) | | **Write Cycles** | 4 million cycles (typical) | | **Data Retention** | 200 years | --- ### 2. Part Number Breakdown Understanding the suffix is critical for identifying the specific physical and chemical properties of the chip: * **M93C86**: Device Family (16 Kbit Microwire EEPROM). * **-R**: Operating Voltage Range (1.8V to 5.5V). * **DW**: Package code for TSSOP8. * **6**: Temperature Range 6 (-40 to 85 °C). * **T**: Packaging (Tape and Reel). * **G**: RoHS compliant / ECOPACK2 (Lead-free and Halogen-free). * **/S**: Usually denotes a specific manufacturing process or a customer-specific sorting/testing flow. --- ### 3. Pin Configuration (TSSOP8) | Pin | Designation | Description | | :--- | :--- | :--- | | 1 | **S** | Chip Select | | 2 | **C** | Serial Clock | | 3 | **D** | Serial Data Input | | 4 | **Q** | Serial Data Output | | 5 | **Vss** | Ground | | 6 | **ORG** | Organization (x8 or x16 mode) | | 7 | **DU/NC** | Don't Use or No Connect | | 8 | **Vcc** | Supply Voltage | --- ### 4. Implementation Details #### Organization Mode (ORG Pin) The memory can be configured in two ways depending on the logic level of the `ORG` pin: * **ORG at Vcc:** The memory is organized as **1024 words of 16 bits**. * **ORG at Vss:** The memory is organized as **2048 bytes of 8 bits**. #### Instruction Set The device operates using a set of 7 instructions: 1. **READ**: Read data from memory. 2. **ERASE**: Erase a specific address. 3. **WRITE**: Write data to a specific address. 4. **EWEN**: Erase/Write Enable (Required before writing). 5. **EWDS**: Erase/Write Disable (Protection mode). 6. **ERAL**: Erase all memory locations. 7. **WRAL**: Write all memory locations with the same data. --- ### 5. Common Applications * **Automotive:** Odometer data, immobilizer codes, and radio settings. * **Industrial:** Calibration data for sensors and motor controllers. * **Consumer Electronics:** Configuration settings for monitors and networking gear.