## Technical Overview: 88C26L-AF5-R The **88C26L-AF5-R** is a specific integrated circuit, typically identified as a **Voltage Detector** (Reset IC) manufactured by **UTC (Unisonic Technologies Co., Ltd)**. It is designed to monitor power supply rails and provide a reset signal to microprocessors or other digital systems when the voltage drops below a specific threshold. --- ### 1. Key Technical Specifications | Feature | Description | | :--- | :--- | | **Part Number** | 88C26L-AF5-R | | **Function** | Voltage Detector / Reset IC | | **Detection Voltage** | 2.6V (indicated by the '26' in the part code) | | **Output Type** | CMOS Output (Push-Pull) | | **Package Type** | SOT-25 (indicated by 'AF5') | | **Packing** | Tape & Reel (indicated by 'R') | | **Status** | Lead-Free / Halogen-Free ('L') | --- ### 2. Functional Description The primary role of this component is to ensure that a system does not operate under unstable voltage conditions. * **Monitoring:** It constantly monitors the $V_{DD}$ pin. * **Threshold Trigger:** If the input voltage falls below the fixed detection voltage (**2.6V**), the output pin ($V_{OUT}$) transitions to a "Low" state. * **Reset Release:** Once the voltage rises above the threshold (plus a small amount of hysteresis), the output returns to a "High" state after a short delay, allowing the CPU to begin its boot sequence. --- ### 3. Pin Configuration (SOT-25) The typical pinout for this UTC series in an AF5 (SOT-25) package is as follows: | Pin Number | Name | Function | | :--- | :--- | :--- | | 1 | $V_{OUT}$ | Reset Output Signal | | 2 | $V_{DD}$ | Power Supply / Monitoring Input | | 3 | $V_{SS}$ | Ground | | 4 | NC / CD | No Connection or Delay Capacitor (Manual specific) | | 5 | NC | No Connection | --- ### 4. Applications This part is commonly found in battery-powered devices and consumer electronics where stable logic levels are critical: * Microprocessor reset circuitry. * Battery life monitors. * Memory battery back-up circuits. * Power failure detectors. --- ### 5. Part Number Breakdown * **88C**: Series identifier (CMOS Voltage Detector). * **26**: 2.6V Detection Threshold. * **L**: Lead-free/Halogen-free plating. * **AF5**: SOT-25 Package. * **R**: Tape & Reel packaging.