## Technical Overview: M93C86-RMB6TP The **M93C86-RMB6TP** is an 16-Kbit serial Microwire EEPROM (Electrically Erasable Programmable Memory) manufactured by STMicroelectronics. It is commonly used for parameter storage in automotive and industrial applications due to its reliability and low power consumption. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Memory Size** | 16 Kbit (2048 x 8 bits or 1024 x 16 bits) | | **Interface** | Microwire (3-wire serial) | | **Operating Voltage** | 1.8V to 5.5V | | **Clock Frequency** | 2 MHz (at 4.5V - 5.5V) | | **Package Type** | UFDFPN8 (MLP8) - 2x3 mm | | **Temperature Range** | -40°C to +85°C (Industrial Grade 6) | | **Write Cycles** | 4 million cycles (at 25°C) | | **Data Retention** | 200 Years | --- ### 2. Functional Description The device is organized internally based on the **ORG** pin setting. This allows the user to define the word width: * **ORG connected to VCC:** Memory is organized as 1024 words of 16 bits each. * **ORG connected to GND:** Memory is organized as 2048 words of 8 bits each. #### Control Signals * **S (Chip Select):** Activates the device. * **D (Serial Data Input):** Used to transfer instructions, addresses, and data. * **Q (Serial Data Output):** Used to read data out of the device. * **C (Serial Clock):** Synchronizes all data transfers. --- ### 3. Part Number Breakdown Understanding the suffix codes is critical for replacement and procurement: | Code | Meaning | | :--- | :--- | | **M93C86** | Device Family (16 Kbit Microwire EEPROM) | | **-R** | Operating Voltage: 1.8V to 5.5V | | **MB** | Package: UFDFPN8 (2x3 mm) | | **6** | Temperature Range: -40 to 85 °C | | **T** | Packing: Tape and Reel | | **P** | Environmental: ECOPACK2 (RoHS compliant) | --- ### 4. Typical Application Circuit In a standard application, the EEPROM connects to a Microcontroller (MCU) using the following logic: ```c // Pseudo-code logic for interacting with M93C86 void write_data(uint16_t address, uint16_t data) { SET_CHIP_SELECT_HIGH(); SEND_OPCODE(WRITE); // Opcode for M93C86 SEND_ADDRESS(address); SEND_DATA(data); SET_CHIP_SELECT_LOW(); WAIT_FOR_READY(); // Check Ready/Busy status on Q pin } ``` ---