R3111Q281B-TR-FE

Supervisors Overview

The R3111Q281B-TR-FE is a low voltage detector from the R3111Q series manufactured by Nisshinbo Micro Devices. It operates within a supply voltage range of 700 mV to 10 V with a typical operating current of 1.1 uA. The device features a fixed threshold voltage of 2.8 V, with an over-voltage threshold of 2.856 V and an under-voltage threshold of 2.744 V. It provides a reset delay time of 100 us and maintains a detection accuracy of 2%. The component utilizes an open-drain output type and is housed in an SC-82AB-4 package.

Supervisors Feature Summary

• Ultra-low power consumption suitable for battery-operated systems
• High threshold voltage accuracy for reliable system monitoring
• Integrated hysteresis circuit to prevent output oscillation
• Compact surface-mount packaging for space-constrained designs

Supervisors Applications

• System reset circuits in portable electronic devices
• Battery backup switching mechanisms
• Voltage supervision in industrial control modules
• Power management in automotive electronics

Supervisors Procurement Notes

Verify the specific suffix TR-FE confirms the reel packaging format required for automated assembly processes. Ensure the SC-82AB-4 package dimensions align with the target PCB footprint. Confirm RoHS compliance status matches environmental regulations for the intended market. Cross-reference the manufacturer part number against official datasheets to validate the 2.8 V threshold specification before finalizing procurement orders.

Supervisors Selection Notes

Select this component when a precise 2.8 V detection level is required for single-input voltage monitoring. The open-drain output interface allows flexibility in interfacing with various logic families. Consider the 1.1 uA operating current for applications demanding minimal quiescent power draw. The wide input voltage range supports operation from low-power sources up to standard 10 V rails without external regulation.

Supervisors Part Context

This part belongs to the R3111Q series of CMOS-based voltage detectors designed for high accuracy and low current consumption. The series includes variants with different threshold voltages and output types, such as Nch open drain or CMOS outputs. These ICs integrate a voltage reference, comparator, and resistors for internal threshold setting, eliminating the need for external adjustment components.

Supervisors Replacement Considerations

Direct substitutes include other R3111Q series parts with identical 2.8 V thresholds and open-drain outputs, such as R3111N281A-TR-FE if SOT-23-5 packaging is acceptable. Verify pinout compatibility and thermal characteristics when swapping between package types like SC-82AB-4 and SOT-23-5.