The S-80720AN-DH is a voltage detector IC manufactured by SII Semiconductor Corporation. This IC is designed to monitor the input voltage and generate a reset signal when the voltage falls below a specified threshold. It's commonly used to ensure that microcontrollers and other digital circuits start up correctly and operate reliably, even when the power supply voltage fluctuates.

Applications

• Microcontroller reset circuits
• Power-on reset (POR) circuits for digital devices
• Battery voltage monitoring
• Overvoltage and undervoltage protection
• Power supply monitoring

Features

• Precise detection voltage
• Ultra-low current consumption
• Built-in hysteresis
• Small package size (SOT-23-5)
• Wide operating temperature range

Benefits

• Ensures reliable microcontroller operation by preventing erroneous code execution during power-up or brown-out conditions.
• Extends battery life in portable devices due to minimal current draw.
• Prevents oscillation of the reset signal near the threshold voltage, ensuring clean reset behavior.
• Easy integration into space-constrained applications due to its compact size.
• Suitable for use in a variety of environments due to its wide operating temperature range.

Detailed Specifications

The S-80720AN-DH has a detection voltage of 2.0V. The ultra-low current consumption minimizes the load on the power supply and helps to extend battery life. The built-in hysteresis prevents the output from oscillating when the input voltage is near the detection threshold. The SOT-23-5 package allows for easy integration into compact electronic devices. The operating temperature range is from -40°C to +85°C. The output is an N-channel open drain output.

This voltage detector monitors the power supply voltage of systems that incorporate a CPU, MCU, or DSP. If the power supply voltage drops below the detection voltage, the reset signal is asserted, and the system is held in the reset state. When the power supply voltage rises above the release voltage, the reset signal is de-asserted, and the system is allowed to operate normally. The hysteresis characteristic prevents unwanted reset signals from being generated due to noise on the power supply voltage.