The S-80943PLMC-G91-T22 is a voltage detector IC produced by SII Semiconductor Corporation. It's designed to monitor the supply voltage and assert a reset signal when the voltage drops below a specific threshold. This function is essential for preventing malfunctions and ensuring the proper operation of microcontrollers, CPUs, and other sensitive electronic devices.

Applications

• Microcontroller reset circuits
• CPU reset circuits
• Power supply monitoring
• Battery-powered devices
• Portable electronics
• Automotive electronics

Features

• Detection Voltage: 4.3V (Implied from the part number series)
• High-precision voltage detection
• Low current consumption
• Small package size (likely SOT-23 or similar)
• Built-in hysteresis
• Open drain output

Benefits

• Prevents system crashes and data loss
• Ensures reliable system startup
• Extends battery life in portable applications
• Saves board space due to its compact design
• Provides a clean and stable reset signal
• Simplifies interfacing with various logic circuits

Additional Details

The S-80943PLMC-G91-T22 incorporates hysteresis to prevent unwanted oscillations near the threshold voltage, enhancing the stability of the reset signal. Its open-drain output offers flexibility in interfacing with different logic circuits. The device's low current draw is particularly beneficial in battery-operated systems, contributing to longer run times. This voltage detector is a crucial component in systems that require dependable voltage monitoring and reset functionality.

The precise voltage detection capability of the S-80943PLMC-G91-T22 guarantees that the reset signal is asserted only when necessary, preventing unnecessary interruptions to the system's operation. The device's small footprint allows for easy integration into densely populated circuit boards. The open-drain output configuration provides versatility in connecting to different voltage levels and logic families.