The R3111N272A-TR is a voltage detector IC manufactured by Ricoh. It is designed to monitor the supply voltage and generate a reset signal when the voltage drops below a predetermined threshold. This function is critical for preventing malfunctions in microcontrollers and other sensitive electronic components due to unstable power conditions. This IC incorporates a built-in delay circuit and offers low supply current consumption.

Applications

• Microcontroller reset circuits
• CPU reset circuits
• Power-on reset circuits
• Battery voltage monitoring
• Power failure detection

Features

• High-Accuracy Voltage Detection: Precisely monitors voltage levels.
• Low Supply Current: Minimizes power consumption, extending battery life.
• Built-in Delay Circuit: Prevents false resets caused by transient voltage drops.
• Small Package: Allows for compact designs and easy integration.
• Wide Operating Voltage Range: Suitable for a variety of applications.

Benefits

• Improved System Stability: Prevents system crashes due to voltage fluctuations.
• Extended Battery Life: Low power consumption is ideal for battery-powered devices.
• Simplified Circuit Design: Integrated delay simplifies the design process.
• Compact Solution: Small package size allows for use in small form-factor products.

Additional Details

The R3111N272A-TR features a detection voltage of approximately 2.7V. The internal delay circuit suppresses momentary voltage dips from triggering a reset. The IC is commonly employed in a wide range of applications, including consumer electronics, industrial controls, and automotive systems. The low operating current makes it particularly well-suited for portable and battery-powered devices. The "-TR" suffix indicates that the part is supplied in tape and reel packaging for automated assembly. The hysteresis characteristic built into the IC helps prevent oscillations near the threshold voltage, providing a stable reset signal.

The device is typically available in a small package, such as SOT-23, which enables it to be integrated into densely populated circuit boards. The R3111 series includes a range of voltage detection thresholds, allowing designers to select the optimal voltage level for their particular application. The CMOS construction of the IC provides stable operation and low power consumption across a wide temperature range.