The **M93C66-RMB3TP** is a specific variant of the M93C66 family, which consists of 4-Kbit serial Microwire EEPROM (Electrically Erasable Programmable Memory) devices. This part is manufactured by **STMicroelectronics**. --- ### 1. Key Technical Specifications The table below summarizes the core electrical and operational parameters for this specific part number. | Parameter | Specification | | :--- | :--- | | **Memory Size** | 4 Kbit (4096 bits) | | **Memory Organization** | 256 x 16-bit or 512 x 8-bit (User selectable) | | **Interface** | Microwire (3-wire serial interface) | | **Operating Voltage (Vcc)** | 1.8V to 5.5V | | **Clock Frequency** | 2 MHz (at 4.5V) / 1 MHz (at 1.8V) | | **Operating Temperature** | -40°C to +125°C (Automotive Grade 3) | | **Package Type** | UFDFPN8 (MLP8) - Ultra-thin Fine-pitch Dual Flat No-lead | | **Write Cycles** | 4,000,000 cycles | | **Data Retention** | 200 Years | --- ### 2. Part Number Breakdown To understand the specific features of the **M93C66-RMB3TP**, we can decode the suffix: * **M93C66**: Base part number for the 4-Kbit Microwire EEPROM. * **-R**: Indicates the low voltage range (1.8V to 5.5V). * **MB**: Indicates the **UFDFPN8** package (2x3 mm). * **3**: Indicates **Automotive Grade 3** temperature range (-40°C to +125°C). * **TP**: Indicates **Tape and Reel** packaging. --- ### 3. Pin Configuration (UFDFPN8) The device typically uses 8 pins to facilitate communication and power. | Pin Number | Name | Description | | :--- | :--- | :--- | | 1 | **S** | Chip Select (Active High) | | 2 | **C** | Serial Clock | | 3 | **D** | Serial Data Input | | 4 | **Q** | Serial Data Output | | 5 | **Vss** | Ground | | 6 | **ORG** | Organization Select (High: x16, Low: x8) | | 7 | **DU/NC** | Do Not Use / No Connect | | 8 | **Vcc** | Supply Voltage | --- ### 4. Functional Features * **Write Protection:** The device includes a status register that can be used to prevent accidental writes to the memory. * **Sequential Read:** It supports reading the entire memory contents sequentially with a single command. * **Ready/Busy Signal:** After a write cycle, the Data Output (Q) pin can be used to poll the status of the internal write operation. * **Low Power Consumption:** Optimized for battery-powered applications with low standby current. ---