The S-81350HG-KD-T1 is a voltage detector IC manufactured by SII Semiconductor Corporation. This device monitors the input voltage and asserts a reset signal when the voltage drops below a specified threshold. This is critical for preventing damage or malfunction in microcontrollers and other sensitive circuits due to under-voltage conditions. The 'KD' likely designates the specific voltage detection level, and the 'T1' indicates tape and reel packaging.

Applications

• Microcontroller reset circuits
• Power supply supervision
• Battery-operated devices
• Industrial control systems
• Automotive electronics

Features

• High-accuracy voltage detection
• Ultra-low current consumption
• Open-drain output
• Small 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 with integrated functionality.
• Compact solution suitable for space-constrained applications.
• Enhanced noise immunity due to hysteresis.

Technical Specifications

The S-81350HG-KD-T1 has a detection voltage specific to the 'KD' variant; consult the datasheet for the exact value. It has very low current consumption, typically in the microampere range. The output is an open-drain N-channel MOSFET. It is packaged in a SOT-23 surface-mount package. It also includes hysteresis to avoid false triggering near the threshold. The 'T1' indicates that the device is shipped in tape and reel packaging for automated assembly.

The open-drain output needs a pull-up resistor to define the high-level voltage. When the input voltage goes below the threshold, the output transistor turns off, pulling the output high through the resistor. The hysteresis prevents rapid switching (chattering) when the input voltage is close to the threshold. The device is intended to be used in a variety of low-power applications where accurate voltage monitoring is important.