The S-80740AN is a voltage detector manufactured by SII Semiconductor Corporation. This device is designed to monitor voltage levels in electronic circuits and provide a reset signal when the voltage drops below a specified threshold. This function is crucial for protecting sensitive components from damage due to undervoltage conditions and ensuring proper system operation.

Applications

• Microcontroller reset circuits: The S-80740AN is commonly used to reset microcontrollers during power-up or when the supply voltage drops below the operating range.
• Power supply monitoring: It monitors the output voltage of power supplies and provides a warning signal if the voltage is out of regulation.
• Battery-powered devices: It protects battery-powered devices from deep discharge by disabling the load when the battery voltage is low.
• System voltage monitoring: It monitors the voltage levels in various parts of a system and provides a fault signal if any voltage is out of range.
• Industrial control systems: It is used in industrial control systems to monitor the voltage levels of sensors and actuators.

Features

• Low current consumption: The S-80740AN consumes very little current, making it suitable for battery-powered applications.
• Wide operating voltage range: It can operate over a wide voltage range, typically from 1.0 V to 10.0 V depending on the specific version.
• High-accuracy detection voltage: The detection voltage is highly accurate, ensuring reliable voltage monitoring.
• Hysteresis: The device incorporates hysteresis, which prevents oscillations around the detection threshold.
• Open-drain output: It has an open-drain output, which allows for flexible connection to various types of circuits.
• Small package: Available in compact packages like SOT-23, SOT-89, and custom packages.

Benefits

• Protection against undervoltage: The device protects sensitive electronic components from damage due to undervoltage conditions.
• Improved system reliability: It improves system reliability by ensuring that the microcontroller or other critical components operate within their specified voltage range.
• Extended battery life: The low current consumption helps to extend battery life in battery-powered applications.
• Simplified design: It simplifies the design of voltage monitoring circuits by providing a single, integrated solution.
• Cost-effective: It is a cost-effective solution for voltage monitoring applications.

The specific threshold voltage of the S-80740AN will vary depending on the exact part number. Datasheets for specific versions should be consulted for detailed specifications, including voltage thresholds, temperature ranges, and output characteristics. It typically features a built-in delay circuit that prevents false resets due to transient voltage drops. This delay is essential for noise immunity and ensuring stable system operation.