The **M93C86-RMB7P** is a specific variant of the 16-Kbit serial EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by STMicroelectronics. It is widely used for non-volatile data storage in consumer electronics and industrial applications. --- ### 1. Key Technical Specifications The part number reflects specific technical attributes regarding capacity, voltage, and packaging. | Parameter | 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 (Low Voltage range) | | **Clock Frequency** | Up to 2 MHz | | **Write Cycles** | 1,000,000 (Endurance) | | **Data Retention** | 40 Years | | **Package Type** | UFDFPN8 (Ultra-thin Fine pitch Dual Flat No-lead) | --- ### 2. Detailed Pinout Description The device typically uses an 8-pin configuration. Below is the functional mapping for the UFDFPN8 package: | Pin Name | Function | Description | |:---:|:---|:---| | **S** | Chip Select | Activates the device when High. | | **D** | Serial Data Input | Receives instructions and data. | | **Q** | Serial Data Output | Outputs data during read operations. | | **C** | Serial Clock | Synchronizes data movement in/out of the chip. | | **ORG** | Organization | Selects between x8 or x16 memory structure. | | **Vcc / Vss** | Power | Supply voltage and Ground. | --- ### 3. Core Functional Features * **User-Selectable Internal Organization:** By setting the `ORG` pin, the memory can be accessed as either 2,000 bytes (8-bit) or 1,000 words (16-bit). * **Sequential Read:** The device supports reading the entire memory contents via a single instruction by continuing to provide clock pulses. * **Write Protection:** Includes a "Write Disable" mode to prevent accidental data corruption during power-up or power-down sequences. * **Low Power Consumption:** Optimized for battery-operated devices with a very low standby current. --- ### 4. Part Number Breakdown (Decoding) To understand the specific variant "RMB7P": * **M93C86**: Base Part Number (16-Kbit Microwire EEPROM). * **-R**: Voltage range 1.8V to 5.5V. * **MB**: Package code for **UFDFPN8** (2x3 mm). * **7**: Temperature range (–40 to +105 °C). * **P**: Indicates Green/RoHS compliant packaging (Lead-free). --- ### 5. Common Applications Due to its small footprint and low voltage requirements, it is commonly found in: * **Automotive:** Storing calibration data or odometer readings. * **Consumer Electronics:** Storing user settings in TVs or smart appliances. * **Industrial:** Configuration storage for sensors and controllers.