## UB211CXXL-AF5-R: Technical Overview The **UB211CXXL-AF5-R** is a specific integrated circuit (IC) part number, typically associated with **UTC (Unisonic Technologies Co., Ltd)**. It is a high-precision, low-power consumption voltage detector/reset IC designed to monitor power supply levels in digital systems. --- ### 1. Key Technical Specifications Based on the standard nomenclature for the UB211 series, here are the core electronic characteristics: | Parameter | Specification | | :--- | :--- | | **Device Type** | Voltage Detector / Reset IC | | **Output Configuration** | CMOS Output (Active Low) | | **Detection Voltage** | Specific to the "XX" code (e.g., 2.7V, 3.0V) | | **Operating Voltage Range** | 0.7V to 10.0V | | **Current Consumption** | Typ. 0.8µA (Low Power) | | **Package Type** | SOT-25 / SOT-23-5 (indicated by AF5) | | **Operating Temperature** | -40°C to +85°C | --- ### 2. Part Number Breakdown The suffixing follows a specific logic used by UTC to define the hardware features: * **UB211**: Series name (High-precision voltage detector). * **C**: Output Type (CMOS output). * **XXL**: Voltage rank (The "XX" represents the threshold, e.g., 27 = 2.7V). * **AF5**: Package code (SOT-25 / SOT-23-5). * **R**: Tape and Reel packaging. --- ### 3. Pin Configuration (Typical SOT-25) For the UB211 series in an AF5 package, the pinout usually follows this structure: ```text Pin 1: VOUT (Output Terminal) Pin 2: VDD (Power Supply/Input) Pin 3: VSS (Ground) Pin 4: NC (No Connection) Pin 5: NC (No Connection) ``` --- ### 4. Functional Application This electronic part is primarily used for **Supervisory Circuits**. Its main functions include: 1. **Reset Generation**: Providing a reset signal to a Microprocessor (MCU) when the power supply drops below a safe operating threshold. 2. **Battery Monitoring**: Detecting low battery conditions in portable electronics. 3. **System Reliability**: Preventing "brown-out" conditions where the logic state of a chip becomes unpredictable due to insufficient voltage. --- ### 5. Circuit Example The basic implementation requires minimal external components because the CMOS output does not require a pull-up resistor (unlike Open-Drain versions). ```markdown [VDD Supply] | -------|------- | (2) VDD | | |----(1) VOUT ---> To MCU Reset Pin | (3) VSS | -------|------- | [GND] ```