The R5426D110FA-TR-F is a voltage detector IC manufactured by Ricoh. This integrated circuit is designed to monitor voltage levels in electronic circuits and trigger a reset signal or other actions when the voltage falls below a specified threshold. It is crucial for maintaining the stability and reliability of various electronic devices by preventing malfunctions caused by voltage drops.

Applications

• Microcontroller-based systems: Used to monitor the power supply and reset the microcontroller in case of voltage drops, preventing data corruption and system crashes.
• Battery-powered devices: Monitors the battery voltage to prevent deep discharge, which can damage the battery and shorten its lifespan.
• Power management circuits: Provides undervoltage lockout (UVLO) functionality to protect sensitive components from operating at insufficient voltage levels.
• Real-time clocks (RTC): Ensures the RTC continues to function correctly even during brief power interruptions.
• Memory protection: Safeguards volatile memory by initiating a data backup process when a voltage drop is detected.

Features

• Low Supply Current: Minimizes power consumption, making it suitable for battery-powered applications.
• High Accuracy Detection Voltage: Ensures precise monitoring of voltage levels.
• Built-in Hysteresis: Prevents chattering or oscillations near the threshold voltage.
• Small Package: Facilitates integration into compact electronic devices.
• Open Drain Output: Allows flexible connection to various logic circuits.

Benefits

• Improved System Reliability: Prevents malfunctions and data corruption caused by voltage drops.
• Extended Battery Life: Low power consumption helps prolong the operating time of battery-powered devices.
• Simplified Circuit Design: Integrated functions reduce the need for external components.
• Enhanced System Protection: Protects sensitive components from damage due to undervoltage conditions.
• Cost-Effective Solution: Provides a reliable and affordable solution for voltage monitoring and protection.

Additional Details

The R5426D110FA-TR-F typically operates within a specific voltage range and temperature range, as detailed in the Ricoh datasheet. It is often available in a small SOT-23 package, facilitating easy integration into various PCB layouts. The device's output is an open drain N-channel MOSFET, which requires a pull-up resistor to a voltage source. The detection voltage is fixed at a specific value, for example, 1.0V, with a certain tolerance. The hysteresis is typically a few tens of millivolts, preventing unstable switching behavior. The supply current is usually in the microampere range, making it energy-efficient. This voltage detector is crucial in applications needing stable voltage operation, such as in portable devices and industrial control systems.