The R3111N272A-TR-F is a voltage detector IC manufactured by Ricoh. It is designed to monitor supply voltage levels and generate a reset signal if the voltage drops below a specific threshold. This functionality is crucial for ensuring stable operation of microcontrollers and other voltage-sensitive components. The IC features high accuracy, low supply current, and a built-in delay circuit to prevent false resets.

Applications

• Microcontroller reset circuits
• CPU reset circuits
• Power-on reset circuits
• Battery voltage monitoring
• System voltage supervision

Features

• High-Accuracy Voltage Detection: Ensures precise monitoring of the supply voltage.
• Low Supply Current: Minimizes power consumption in battery-powered applications.
• Built-in Delay Circuit: Prevents false resets due to transient voltage drops.
• Small Package: Suitable for compact designs and space-constrained applications.
• Wide Operating Temperature Range: Provides reliable performance in various environments.

Benefits

• Improved System Reliability: Prevents system crashes due to undervoltage conditions.
• Extended Battery Life: Low power consumption is ideal for portable devices.
• Simplified Circuit Design: Integrated delay circuit reduces the need for external components.
• Compact Solution: Small package allows for easy integration into space-limited designs.

Additional Details

The R3111N272A-TR-F has a detection voltage of approximately 2.7V. The IC monitors the power supply voltage and asserts a reset signal when it falls below this threshold, protecting the microcontroller from potentially erroneous operation. The built-in delay prevents momentary voltage dips from causing unnecessary resets. The low supply current makes it well-suited for battery-powered and energy-efficient applications. The small package, often SOT-23, allows for high-density PCB assembly. The "-TR-F" suffix denotes tape and reel packaging and potentially other specific characteristics related to the manufacturing or quality control processes.

The R3111 series provides different voltage detection thresholds, allowing engineers to select the best threshold for their specific needs. The R3111N272A-TR-F is often found in applications such as portable electronics, industrial controls, and automotive systems. The hysteresis feature helps to prevent oscillations around the threshold voltage.