The S-80819ALNP-EAG-T2 is a voltage detector IC manufactured by SII Semiconductor Corporation. This IC is designed to monitor the power supply voltage of electronic devices and issue a reset signal when the voltage drops below a specified threshold. This functionality is crucial for preventing malfunctions and data corruption in microcontrollers and other digital circuits.

Applications

• Microcontroller Reset: Generates a reliable reset signal during power-up, power-down, and brownout conditions.
• Memory Protection: Prevents data corruption in volatile memory by initiating a reset when the voltage is insufficient.
• Power Management Systems: Monitors battery voltage and triggers a shutdown sequence to prevent deep discharge.
• Industrial Control Systems: Safeguards critical processes from voltage fluctuations.
• Consumer Electronics: Protects sensitive components in various consumer electronic devices.

Features

• Detection Voltage: 1.9V (Indicated by the '19' in 'S-80819ALNP').
• High-Precision Detection: Ensures accurate voltage monitoring.
• Ultra-Low Current Consumption: Minimizes power drain for extended battery life in portable devices.
• 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: Provides flexibility in interfacing with various logic levels.

Benefits

• Improved System Reliability: Prevents system crashes and data loss caused by low voltage conditions.
• Extended Battery Life: Low power consumption maximizes battery runtime in portable devices.
• Simplified Circuit Design: Requires minimal external components.
• Reduced Board Space: Compact package enables smaller and more efficient designs.
• Enhanced Safety: Protects sensitive components from damage due to voltage fluctuations.

The S-80819ALNP-EAG-T2 operates by constantly monitoring the input voltage. When the voltage falls below the detection threshold of 1.9V, the N-channel open drain output is activated, 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 prevents the output from oscillating due to minor voltage fluctuations near the threshold. This voltage detector is a vital component for ensuring the stable and reliable operation of a wide range of electronic devices.