### ADM1815-R22ARTZ-RL: Electronic Component Overview The **ADM1815-R22ARTZ-RL** is a high-precision voltage monitoring device (Microprocessor Reset Circuit) manufactured by **Analog Devices**. It is designed to monitor power supply voltages in microprocessor systems and provide a reset signal during power-up, power-down, and brownout conditions. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Reset Threshold** | 2.18V (Typical) | | **Output Type** | Push-Pull (Active Low) | | **Supply Voltage (Vcc)** | 1.0V to 5.5V | | **Reset Timeout Period** | 150 ms (Minimum) to 600 ms | | **Supply Current** | 12 µA (Typical) | | **Package Type** | SOT-23 (3-Lead) | | **Operating Temperature** | -40°C to +105°C | --- ### 2. Functional Description #### Reset Operation The device monitors the $V_{CC}$ pin. If the voltage drops below the fixed threshold (2.18V for the R22 variant), the **RESET** output goes low. Once $V_{CC}$ rises above the threshold again, the reset signal remains active for a specific "timeout period" (approx. 150ms) to allow the system clock and power to stabilize before the microprocessor starts. #### Push-Pull Logic Unlike "Open-Drain" monitors which require an external pull-up resistor, the **ADM1815** features a **Push-Pull** output stage. This means it can actively drive the signal high or low, reducing the external component count and saving board space. --- ### 3. Pin Configuration | Pin Number | Name | Function | | :--- | :--- | :--- | | 1 | **RESET** | Active-low output signal that triggers the system reset. | | 2 | **Vcc** | Power supply input and monitored voltage pin. | | 3 | **GND** | Ground reference. | --- ### 4. Part Number Breakdown: ADM1815-R22ARTZ-RL * **ADM1815**: Product Series (Microprocessor Supervisor). * **R22**: Voltage Threshold (2.18V). * **ARTZ**: Package Code (SOT-23) and Lead-Free designation. * **RL**: Shipping Method (Tape and Reel). --- ### 5. Common Applications * Microprocessor and Microcontroller Systems * Computers and Controllers * Intelligent Instruments * Portable and Battery-Powered Equipment ---