R3111Q191A-TR-FE

Supervisors Overview

The R3111Q191A-TR-FE is a low voltage detector manufactured by Nisshinbo Micro Devices Inc. It monitors a single input channel with a threshold voltage of 1.9 V and an overvoltage threshold of 1.958 V. The device features an open-drain output and operates within a supply voltage range of 0.7 V to 10 V. It maintains high accuracy of 2% and consumes a typical operating current of 1.1 µA. The component supports a backup function, includes power failure detection, and offers a reset delay time of 100 µs. It is housed in an SC-82AB-4 package and functions reliably across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Provides precise monitoring of a single voltage input channel with defined threshold levels for under-voltage and over-voltage conditions.
• Features an open-drain output configuration suitable for interfacing with various logic families without requiring additional pull-up components.
• Incorporates a battery backup switch mechanism to maintain system state during power transitions or temporary outages.
• Detects power failures to ensure data integrity and system stability during unexpected supply disruptions.

Supervisors Applications

• Monitoring battery voltage levels in portable electronic devices
• Supervising power rails in embedded systems and microcontrollers
• Ensuring reliable operation in industrial control equipment

Supervisors Procurement Notes

Verify the specific suffix codes against official datasheets to confirm pinout compatibility and electrical characteristics. Ensure the SC-82AB-4 package matches your PCB footprint requirements. Confirm RoHS compliance status if required by your manufacturing standards. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Validate that the operating temperature range meets your environmental specifications.

Supervisors Selection Notes

Select this component when a low quiescent current is critical for extending battery life in portable applications. Choose this model if an open-drain output is preferred for flexible logic level interfacing. Consider this part for designs requiring a dedicated backup function to preserve memory or state during power dips. Ensure the 1.9 V threshold aligns with the minimum operating voltage of your downstream circuitry.

Supervisors Part Context

This device belongs to the R3111Q series of supervisory circuits from Nisshinbo Micro Devices. The series is designed for low-voltage applications requiring high accuracy and low power consumption. These detectors are commonly used in consumer electronics and industrial systems where reliable power management is essential. The Q-series typically denotes automotive-grade or enhanced reliability variants depending on the specific manufacturer documentation.

Supervisors Replacement Considerations

Check for direct substitutes within the R3111Q series with different threshold voltages if the 1.9 V setting is not suitable. Verify pin-to-pin compatibility with other SC-82AB-4 voltage detectors from Nisshinbo or competitors. Ensure replacement parts offer similar operating current and accuracy specifications to maintain system performance.