The **BD4826FVE-TR** is a high-precision, low-current consumption voltage detector IC manufactured by **ROHM Semiconductor**. It belongs to the BD48xx series, which utilizes a standard CMOS process. --- ### ## Technical Specifications The following table summarizes the primary electrical characteristics of the BD4826FVE-TR: | Parameter | Specification | | :--- | :--- | | **Detection Voltage** | 2.6V | | **Output Type** | N-Channel Open Drain | | **Supply Voltage Range** | 0.8V to 10.0V | | **Current Consumption** | 0.8 μA (Typ.) | | **Operating Temperature** | -40°C to +105°C | | **Package Type** | VSOF5 (Small Surface Mount) | | **Detection Precision** | ±1% | --- ### ## Key Features 1. **Open Drain Output**: Requires an external pull-up resistor. This allows for level shifting and connecting the output to a different voltage rail than the power supply. 2. **Ultra-Low Current Consumption**: At typically **0.8 μA**, it is ideal for battery-powered devices where energy efficiency is critical. 3. **High Accuracy**: The ±1% detection voltage precision ensures reliable monitoring of power rails to prevent system malfunctions. 4. **Small Footprint**: The VSOF5 package is extremely compact, making it suitable for high-density circuit boards in portable electronics. --- ### ## Application Circuit & Logic When the input voltage ($V_{DD}$) drops below the detection voltage ($2.6V$), the output ($V_{OUT}$) transitions to a **Low** state. When the voltage rises above the detection voltage plus a small amount of hysteresis, the output returns to **High** (via the pull-up resistor). #### ### Basic Implementation ```c // Typical Connection Logic [VDD] ----> [VDD Pin] [GND] ----> [GND Pin] [VOUT Pin] --+-- [Reset Pin of MCU] | [Pull-up Resistor] | [VCC (e.g., 3.3V)] ``` --- ### ## Common Applications * **Microcontrollers/DSP Reset**: Used to hold a processor in reset until the power supply stabilizes. * **Battery Monitoring**: Detecting low-battery conditions in portable devices. * **Power Supply Sequencing**: Ensuring different power rails turn on/off in the correct order. * **Industrial Equipment**: Protecting sensitive electronics from "brown-out" conditions.