## ADM1816-R23ARTZ-R7 Electronic Component Overview The **ADM1816-R23ARTZ-R7** is a low-cost, precision voltage monitoring device (Microprocessor Supervisory 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 The following table outlines the primary electrical characteristics of this specific variant: | Parameter | Specification | | :--- | :--- | | **Threshold Voltage ($V_{TH}$)** | 2.31V (Nominal) | | **Output Configuration** | Open-Drain (Active Low) | | **Supply Voltage ($V_{CC}$)** | 1.0V to 5.5V | | **Reset Timeout Period** | 150 ms (Typical) | | **Supply Current ($I_{CC}$)** | 20 $\mu$A (Typical) | | **Operating Temperature** | -40°C to +105°C | | **Package Type** | SOT-23 (3-lead) | --- ### 2. Functional Description The device performs three main functions to ensure system reliability: 1. **Power-On Reset:** When $V_{CC}$ rises above the threshold, the device keeps the reset signal active for approximately 150ms to allow the power supply and system clock to stabilize. 2. **Brownout Detection:** If the supply voltage drops below the 2.31V threshold, the reset output is immediately triggered to prevent erratic system behavior. 3. **Active Low Output:** The "R" in the part number indicates an **Active Low** output. Since it is **Open-Drain**, an external pull-up resistor is required to interface with logic levels (e.g., 3.3V or 5V). --- ### 3. Part Number Breakdown Understanding the nomenclature helps identify the specific features of the component: * **ADM1816:** Base model (Microprocessor Monitor). * **R23:** Threshold voltage indicator (2.31V). * **ARTZ:** Package code for SOT-23 (RoHS compliant). * **R7:** Packaging format (7-inch Tape and Reel, typically 3,000 pieces). --- ### 4. Typical Application Circuit Since this is an open-drain device, the implementation usually looks like this: ```text VCC (3.3V) | [ R_pullup ] (e.g., 10k Ohms) | +---------- To Microcontroller RESET Pin | [ ADM1816 Pin 1 (RESET) ] ``` ---