The S-80741AN is a voltage detector IC from SII Semiconductor Corporation, designed for monitoring voltage levels in electronic circuits. Its primary function is to generate a reset signal when the voltage drops below a pre-determined threshold. This critical functionality is essential for safeguarding sensitive components such as microcontrollers and memory devices from damage or erratic behavior caused by undervoltage conditions.

Applications

• Microcontroller Reset: Provides a reliable reset signal for microcontrollers during power-up, power-down, or brownout situations.
• Power Supply Monitoring: Monitors the output voltage of power supplies, triggering an alarm or shutdown if the voltage falls outside of the specified range.
• Battery-Powered Devices: Protects battery-powered devices from deep discharge by disabling the load when the battery voltage is critically low, thereby extending battery life.
• Industrial Control Systems: Monitors voltage levels within industrial equipment to ensure stable and safe operation, preventing damage from undervoltage.
• Automotive Electronics: Used in automotive systems to monitor battery voltage and protect electronic components from low-voltage conditions.

Features

• High-Precision Voltage Detection: Provides accurate and reliable voltage detection.
• Low Current Consumption: Minimizes power consumption, making it ideal for battery-powered applications.
• Hysteresis: Incorporates hysteresis to prevent output oscillations and ensure stable operation.
• Open-Drain Output: Offers flexible connection options to various types of circuits.
• Small Package Options: Available in compact surface-mount packages such as SOT-23 and SOT-89, enabling space-saving designs.
• Wide Operating Temperature Range: Designed to function reliably across a broad temperature range, accommodating diverse environmental conditions.

Benefits

• Undervoltage Protection: Protects sensitive electronic components from damage caused by voltage drops.
• Improved System Reliability: Enhances the overall reliability of electronic systems by preventing erratic behavior caused by low voltage.
• Extended Battery Life: Reduces power drain in battery-powered devices, leading to longer operating times.
• Simplified Circuit Design: Provides a single, integrated solution for voltage detection and reset functions.
• Cost-Effective: Provides an economical way to improve system robustness and prevent costly failures.

The specific detection voltage for the S-80741AN will be detailed in the product's datasheet. The device's output remains low as long as the input voltage is below the detection threshold. Once the input voltage exceeds the threshold, the output transitions to a high-impedance state. The built-in hysteresis ensures stable switching and prevents spurious resets due to noise. Consult the official datasheet for the S-80741AN for comprehensive electrical characteristics, application examples, and operating guidelines.