The **BR95040-RDS6TP** is a specific Serial EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by **ROHM Semiconductor**. It is widely used in automotive and industrial applications for non-volatile data storage. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical and physical characteristics: | Feature | Specification | | :--- | :--- | | **Memory Size** | 4 Kbit (512 x 8 bits) | | **Interface** | SPI (Serial Peripheral Interface) | | **Clock Frequency** | 5 MHz (Max) | | **Operating Voltage** | 1.8V to 5.5V | | **Package Type** | TSSOP-B8 (MSOP8 equivalent) | | **Temperature Range** | -40°C to +85°C | | **Write Cycles** | 1,000,000 cycles | | **Data Retention** | 40 Years | --- ### 2. Functional Description The device operates using a standard SPI bus, which consists of four main signals: * **SCK (Serial Clock):** Synchronizes the data movement. * **SI (Serial Data Input):** Receives instructions, addresses, and data. * **SO (Serial Data Output):** Sends data back to the host microcontroller. * **CSB (Chip Select):** Enables or disables the device. ### 3. Key Internal Features 1. **Write Protection:** Includes a hardware Write Protect (`WP`) pin and internal software status registers to prevent accidental data overwriting. 2. **Page Write Mode:** Supports writing up to 16 bytes in a single write cycle, improving throughput. 3. **Low Power Consumption:** Optimized for battery-operated devices, with very low standby current. 4. **Auto-Erase:** The write command automatically initiates an erase cycle before writing new data, simplifying the command structure. --- ### 4. Part Number Breakdown Understanding the suffix `RDS6TP`: * **BR95040:** Base part number (4K SPI EEPROM). * **R:** Denotes the specific series or revision (Standard SPI). * **DS6:** Refers to the TSSOP-B8 package style. * **TP:** Indicates "Tape and Reel" packaging for automated SMT assembly. --- ### 5. Common Applications * **Automotive:** Storing calibration data, odometer readings, or error logs. * **Consumer Electronics:** Settings and user preference storage in smart home devices. * **Industrial:** Configuration parameters for sensors and motor controllers.