The S-81340HG is a voltage detector IC manufactured by SII Semiconductor Corporation. Its main function is to monitor the voltage level of a power supply and generate a reset signal when the voltage drops below a predetermined threshold. This is vital for preventing unstable operation of microcontrollers and other digital circuits when the supply voltage is insufficient.

Applications

• Microcontroller reset circuits
• Power supply supervision
• Battery management systems
• Industrial automation equipment
• Automotive electronics

Features

• High-precision voltage detection
• Extremely low current consumption
• Open-drain N-channel output
• Compact SOT-23 package
• Built-in hysteresis

Benefits

• Improved system reliability by preventing operation at low voltages
• Extended battery life in portable devices due to low power consumption
• Simplified circuit design
• Reduced board space requirements
• Enhanced noise immunity

Technical Specifications

The S-81340HG features a specific detection voltage; consult the datasheet for the exact value. It boasts very low current consumption, typically in the microampere range. The output is an open-drain N-channel MOSFET. It is packaged in a small SOT-23 surface-mount package. The device also features hysteresis to prevent false triggering near the threshold.

The open-drain output requires an external pull-up resistor. When the input voltage falls below the detection threshold, the output transistor turns off, and the output voltage is pulled high by the pull-up resistor. The hysteresis prevents rapid switching when the input voltage is near the threshold. The device is intended for use in a variety of low-power applications where reliable voltage monitoring and reset functionality are critical.