The **ADM6348-37ARTZ-R7** is a precision voltage monitoring device manufactured by Analog Devices. It is primarily used as a microprocessor supervisory circuit to monitor power supply voltage levels and provide a reset signal during power-up, power-down, and brownout conditions. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Reset Threshold** | 3.70V (Nominal) | | **Operating Voltage Range** | 1.0V to 5.5V | | **Supply Current** | 7 µA (Typical) | | **Output Type** | Open-Drain (Active-Low) | | **Reset Timeout Period** | 100 ms (Minimum) | | **Package / Case** | SOT-23-3 (3-Lead Small Outline Transistor) | | **Operating Temperature** | -40°C to +85°C | --- ### 2. Functional Description The device monitors the $V_{CC}$ pin. If the supply voltage drops below the fixed threshold (3.70V), the **RESET** output is triggered. * **Active-Low Reset:** The output stays low as long as $V_{CC}$ is below the threshold. * **Timeout Delay:** Once $V_{CC}$ rises above the threshold, the reset signal remains active for a fixed period (100ms) to allow the system clock and power to stabilize before the microprocessor begins execution. * **Open-Drain Architecture:** Because it is open-drain, it requires an external pull-up resistor. This allows the device to interface with different logic levels (e.g., 3.3V or 5V). --- ### 3. Pin Configuration The SOT-23 package consists of three functional pins: 1. **GND:** Ground reference. 2. **$\overline{RESET}$:** The output signal that initiates a system reset. 3. **$V_{CC}$:** The power supply input and the voltage being monitored. --- ### 4. Typical Application Circuit The following represents a standard implementation with a microcontroller: ```markdown Vcc (3.7V - 5.0V) | +-------+-----------+ | | | [10k Pull-up Resistor]| | | | | [ Vcc ] [ MCU Reset Pin ] +----[RESET]--------+ | [ GND ] | | GND GND ``` --- ### 5. Benefits and Use Cases * **Low Power Consumption:** With only 7 µA current draw, it is ideal for battery-operated devices. * **Reliability:** Replaces discrete components to ensure a clean, glitch-free reset signal. * **Applications:** * Microprocessor and Microcontroller systems. * Computers and Controllers. * Intelligent Instruments. * Portable/Battery-Powered Equipment.