The S-80819ANNP-EDG is a voltage detector manufactured by SII Semiconductor Corporation. This device monitors the input voltage and triggers a reset signal when the voltage drops below a specific threshold. This function is crucial for maintaining the integrity of microcontrollers, memory, and other sensitive electronic components by preventing malfunctions and data corruption during undervoltage conditions.

Applications

• Microcontroller Reset: Provides a reliable reset signal during power-up, power-down, and brownout situations.
• Memory Protection: Prevents data corruption in volatile memory by initiating a reset when the voltage is insufficient.
• Power Management Systems: Monitors battery voltage and initiates a controlled shutdown to prevent deep discharge.
• Industrial Control Systems: Ensures the stable operation of industrial equipment by monitoring power supply voltage.
• Consumer Electronics: Protects sensitive electronic components in devices like smartphones, tablets, and wearables.

Features

• Detection Voltage: 1.9V (Based on the '19' in S-80819ANNP).
• High Accuracy: Provides precise voltage detection for reliable operation.
• Low Current Consumption: Minimizes power drain, making it suitable for battery-powered applications.
• Small Package: Available in compact packages for space-saving designs.
• Built-in Hysteresis: Prevents output chattering due to noise around the detection threshold.
• N-channel Open Drain Output: Offers flexibility in interfacing with various logic levels and microcontrollers.

Benefits

• Improved System Reliability: Prevents system crashes and data loss caused by voltage drops or brownout conditions.
• Extended Battery Life: Low current consumption helps maximize battery runtime in portable devices.
• Simplified Design: Requires minimal external components, simplifying the overall design.
• Reduced Board Space: Compact package allows for smaller and more efficient board layouts.
• Enhanced Safety: Protects sensitive components from damage caused by voltage fluctuations.

The S-80819ANNP-EDG operates by continuously monitoring the input voltage. When the voltage falls below the detection threshold of 1.9V, the N-channel open drain output is asserted, typically pulling the reset line low (an external pull-up resistor is required). The output remains low until the voltage rises above the threshold plus the hysteresis voltage. The hysteresis feature prevents the output from oscillating when the input voltage is near the threshold. This voltage detector is a critical component in ensuring the stability and reliability of many electronic systems.