The **ADM6348-42ARTZ-R7** is a high-performance microprocessor supervisory circuit designed by Analog Devices. Its primary function is to monitor power supply levels and provide a reset signal to a processor when the voltage falls below a predefined threshold. --- ### ## Technical Specifications | Parameter | Specification | | :--- | :--- | | **Threshold Voltage** | 4.2V (Typical) | | **Reset Type** | Active-Low, Open-Drain | | **Output Logic** | Active-Low | | **Supply Voltage (Vcc)** | 1.0V to 5.5V | | **Supply Current** | 7 µA (Typical) | | **Reset Timeout Period** | 100 ms (Minimum) | | **Package / Case** | SOT-23-3 | | **Operating Temperature** | -40°C to +85°C | --- ### ## Key Features 1. **Low Power Consumption:** With a typical supply current of only 7 µA, it is ideal for battery-operated and portable electronics. 2. **Precision Monitoring:** It is factory-trimmed to monitor specific voltage rails (in this case, 4.2V) with high accuracy. 3. **Open-Drain Output:** The output is an open-drain configuration, meaning it requires an external pull-up resistor. This allows for "wired-OR" logic or interfacing with different logic voltage levels. 4. **Glitch Immunity:** The device is designed to ignore fast transients on the Vcc line, preventing accidental system resets. --- ### ## Pin Configuration | Pin Number | Name | Function | | :--- | :--- | :--- | | 1 | **GND** | Ground reference. | | 2 | **RESET** | Active-low output. Asserts when Vcc < Threshold. | | 3 | **Vcc** | Supply voltage and monitored input. | --- ### ## Typical Application Circuit In a standard circuit, the ADM6348 monitors the 5V or 4.5V rail of a microcontroller (MCU). If the voltage drops below 4.2V, the `RESET` pin pulls low, holding the MCU in reset until the power stabilizes. ```markdown Vcc (5V Rail) ----+----[ Vcc Pin ] | [Pull-up Resistor] | MCU Reset Pin <---+----[ RESET Pin ] | GND --------------+----[ GND Pin ] ``` --- ### ## Ordering Information Breakdown * **ADM6348**: Part Series (Microprocessor Supervisory Circuit). * **42**: Voltage Threshold (4.2V). * **ARTZ**: Package code (SOT-23) and Lead-free designation. * **R7**: Packaging Type (7-inch Tape and Reel, 3,000 pieces).