The S-81335HG-KI is a voltage detector IC manufactured by SII Semiconductor Corporation. This integrated circuit is designed to monitor voltage levels in electronic circuits and trigger a reset signal when the voltage falls below a pre-determined threshold. This ensures that connected devices operate within safe voltage limits, preventing damage or malfunction.

Applications

• Microcontroller reset circuits
• Power supply monitoring
• Battery-powered devices
• Industrial control systems
• Automotive electronics

Features

• High-accuracy detection voltage
• Ultra-low current consumption
• Open-drain output
• Small package size
• Hysteresis characteristics

Benefits

• Improved system reliability by preventing operation at low voltages.
• Reduced power consumption, extending battery life in portable devices.
• Simplified circuit design with integrated functionality.
• Compact solution suitable for space-constrained applications.
• Enhanced noise immunity due to hysteresis.

Technical Specifications

The S-81335HG-KI features a detection voltage of 3.5V. It offers ultra-low current consumption, typically in the range of a few microamperes. The output is an open-drain N-channel output. It includes built-in hysteresis characteristics to prevent chattering near the threshold voltage. Available in a small package, such as SOT-23, for compact designs. This voltage detector is designed to operate over a wide temperature range.

The open-drain output allows for flexible interfacing with various microcontrollers and logic circuits. When the input voltage falls below the detection threshold, the output transistor turns off, and the output voltage is pulled high by an external pull-up resistor. When the input voltage rises above the detection threshold plus the hysteresis voltage, the output transistor turns on, pulling the output voltage low. The hysteresis characteristic prevents oscillation or chattering near the detection threshold, ensuring stable operation.