The SGM803-TXN3/TR is a voltage detector (voltage supervisor) manufactured by SG Micro Corp. It's designed to monitor voltage levels in electronic circuits and provide a reset signal when the voltage falls below a specific threshold. This functionality is crucial for ensuring the proper operation of microprocessors, microcontrollers, and other digital circuits, preventing data corruption and system malfunctions.

Applications

• Microprocessor/Microcontroller Reset: Provides a reliable reset signal to microprocessors and microcontrollers during power-up, power-down, or voltage sags, preventing erratic behavior.
• Memory Protection: Protects memory devices from data corruption by initiating a reset or shutdown when the supply voltage drops below the specified threshold.
• Power Supply Monitoring: Monitors the output voltage of power supplies, triggering an alert or shutdown if the voltage deviates outside of acceptable ranges.
• Battery Monitoring: Monitors battery voltage levels in portable devices, providing a low-battery warning or initiating a controlled shutdown to prevent deep discharge.
• Industrial Control Systems: Ensures the reliable operation of critical components in industrial control systems by monitoring voltage levels and triggering appropriate responses.

Features

• Precision Voltage Monitoring: Accurately monitors the supply voltage and triggers a reset when it falls below the specified threshold.
• Fixed Threshold Voltage: Provides a predefined threshold voltage for voltage monitoring. The 'T' in TXN3 indicates a specific threshold voltage, which must be determined from the datasheet.
• Open-Drain Output: Features an open-drain output, enabling flexible interfacing with other circuits and allowing for wired-OR configurations.
• Low Quiescent Current: Minimizes power consumption, making it ideal for battery-powered applications.
• Small Package: Available in a compact SOT-23 package, minimizing board space requirements.

Benefits

• Ensured System Reliability: Guarantees the reliable operation of microprocessors and microcontrollers by providing a timely reset signal when needed.
• Data Integrity: Prevents data corruption in memory devices due to voltage fluctuations.
• Power Supply Protection: Safeguards sensitive circuits from voltage-related damage.
• Extended Battery Life: The low quiescent current contributes to longer battery life in portable devices.
• Compact Design: The small package size allows for compact and efficient circuit designs.

Additional Details

The SGM803-TXN3/TR comes in a SOT-23 package. The '/TR' suffix indicates that the components are provided on tape and reel for automated assembly. The specific threshold voltage associated with the 'T' marking must be confirmed in the device's datasheet. During operation, the device's output remains low when the input voltage is below the threshold. Once the input voltage exceeds the threshold, the output transitions to a high state after a specific delay period. Detailed electrical characteristics, timing diagrams, and threshold voltage specifics are available in the manufacturer's datasheet.