The Ricoh R3112Q281A is a voltage detector IC designed to monitor power supply voltage and provide a reset signal when the voltage drops below a specific threshold. This function is essential for preventing microcontrollers and other sensitive components from malfunctioning during power-up, power-down, or brownout conditions. This IC is manufactured by Ricoh and is characterized by its high accuracy and low power consumption.

Applications

• Microcontroller reset circuits
• Power management systems in portable devices
• Voltage monitoring in automotive electronics
• Industrial control systems requiring power supply supervision
• Consumer electronics requiring power-on reset functionality

Features

• Highly accurate voltage detection
• Ultra-low supply current
• Small package size (SOT-23 or similar)
• Built-in hysteresis
• Open-drain output

Benefits

• Ensures stable system operation by preventing malfunctions during voltage fluctuations
• Extends battery life in portable devices due to minimal power consumption
• Allows for compact designs
• Improves noise immunity
• Provides flexible interfacing options

Additional Details

The R3112Q281A has a detection voltage of 2.8V. It is available in a small surface-mount package. The open-drain output configuration requires an external pull-up resistor. This voltage detector is a reliable and cost-effective solution for ensuring the stability and integrity of power supplies in numerous electronic systems. Its small size and low power consumption render it especially well-suited for portable and battery-powered applications where efficiency is a critical design factor.