The R3111N271A-TR-FB is a voltage detector IC manufactured by Ricoh Electronic Devices Co., Ltd. It's designed to monitor the voltage of a power supply and provide a reset signal to a microcontroller or other system components when the voltage falls below a specific threshold. This ensures that the system starts up and operates correctly, preventing data corruption and other issues.

Applications

• Microcontroller reset circuits
• Power management systems in portable devices
• Voltage monitoring in industrial control equipment
• Battery-powered applications
• System monitoring in automotive electronics

Features

• High-accuracy detection voltage
• Low supply current
• Small SOT-23-5 package
• Built-in hysteresis
• Open drain output
• Wide operating temperature range

Benefits

• Ensures reliable system startup and prevents data corruption.
• Extends battery life in portable devices due to low current consumption.
• Saves board space with its compact package size.
• Prevents oscillations due to built-in hysteresis.
• Offers flexibility in circuit design with open drain output.
• Operates reliably in a wide range of environmental conditions.

Technical Specifications

The R3111N271A-TR-FB has a detection voltage of 2.7V. It typically consumes a very low supply current, in the order of a few microamperes. The SOT-23-5 package allows for easy surface mounting. The built-in hysteresis prevents oscillations during voltage transitions. The open drain output enables flexible interfacing with different logic levels. The device operates over a wide temperature range, typically from -40°C to +85°C. The detection voltage accuracy is typically within a few percent. The reset output remains low as long as the input voltage is below the detection threshold, and goes high after the input voltage exceeds the threshold plus the hysteresis voltage.

This voltage detector is a crucial component in ensuring the stable and reliable operation of various electronic systems. Its low power consumption and small size make it particularly well-suited for portable and space-constrained applications.