The **M93C66-RMB6TG** is a specific type of Non-Volatile Memory (NVM) produced by STMicroelectronics. It belongs to the Microwire bus family of EEPROMs. --- ## 1. Component Overview The device is a 4-Kbit (4096-bit) serial Electrically Erasable Programmable Read-Only Memory. It is designed for low-voltage applications and high reliability. ### Key Specifications | Parameter | Specification | | :--- | :--- | | **Memory Size** | 4 Kbit (4096 bits) | | **Organization** | 256 x 16 bits or 512 x 8 bits (Configurable) | | **Interface** | Microwire (Serial 3-Wire) | | **Supply Voltage (Vcc)** | 1.8V to 5.5V | | **Package Type** | UFDFPN8 (Ultra-thin Fine pitch Dual Flat No-lead) | | **Clock Frequency** | Up to 2 MHz | | **Operating Temp** | -40°C to +85°C | --- ## 2. Technical Features ### User-Configurable Organization The "ORG" pin allows the user to define how the memory is addressed: * **ORG connected to Vcc:** 256 words of 16 bits each. * **ORG connected to GND:** 512 bytes of 8 bits each. ### Data Retention and Endurance * **Endurance:** More than 4 million write cycles. * **Data Retention:** More than 200 years. * **Write Protection:** Includes a software write-protection mechanism to prevent accidental data erasure. ### Low Power Consumption * **Active Read Current:** 400 µA (at 1.8V). * **Standby Current:** 1 µA (at 1.8V). --- ## 3. Pinout Description (UFDFPN8) | Pin Number | Symbol | Description | | :--- | :--- | :--- | | 1 | S | Chip Select | | 2 | C | Serial Clock | | 3 | D | Serial Data Input | | 4 | Q | Serial Data Output | | 5 | Vss | Ground | | 6 | ORG | Internal Organization | | 7 | DU | Don't Use (Leave Floating) | | 8 | Vcc | Supply Voltage | --- ## 4. Part Number Decoding The suffix **-RMB6TG** provides specific manufacturing details: * **M93C66**: Device family and density. * **-R**: Range of supply voltage (1.8V to 5.5V). * **MB**: Package code for UFDFPN8 (2x3 mm). * **6**: Industrial temperature range (-40 to +85 °C). * **T**: Tape and Reel packing. * **G**: ECOPACK2 (RoHS compliant/Lead-free). --- ## 5. Common Applications * **Consumer Electronics:** Storing calibration data or user settings. * **Automotive:** Storing odometer data or configuration parameters. * **Industrial:** Asset tracking and sensor data logging.