BU4922G-TR

Supervisors Overview

The BU4922G-TR is a standard voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply voltages in electronic circuits. It operates within a maximum supply voltage of 7 V and features a typical under-voltage detection threshold of 2.2 V with a precision of ±1%. The device utilizes an SSOP-5 surface-mount package and provides a CMOS output type. It functions across a wide temperature range from -40 °C to +125 °C. Key electrical characteristics include a reset active voltage range of 0.7 V to 7 V and hysteresis defined as Vdet multiplied by 0.05. The circuit current is specified at 0.40 μA when on and 0.55 μA when off at Vdet=4.8V.

Supervisors Feature Summary

• Provides precise under-voltage detection with high accuracy for reliable system supervision
• Features low power consumption suitable for battery-operated applications
• Offers robust performance across extended industrial temperature ranges

Supervisors Applications

• Microprocessor power supply monitoring
• Portable battery-powered devices
• Multi-output power supplies

Supervisors Procurement Notes

Verify the specific revision level and packaging details against the official datasheet before procurement. Confirm that the SSOP-5 package dimensions align with your PCB footprint requirements. Ensure compatibility with your assembly process regarding moisture sensitivity levels. Check for any obsolescence notices or lifecycle status updates directly from the manufacturer. Validate that the CMOS output logic levels meet your downstream component input specifications.

Supervisors Selection Notes

Select this component when a fixed 2.2 V threshold is required for voltage supervision. Consider the CMOS output type for direct interface with digital logic circuits. Evaluate the low standby current for energy-efficient designs. Compare the SSOP-5 package size against available board space constraints. Verify that the operating temperature range meets the environmental conditions of the target application.

Supervisors Part Context

This part belongs to the BU49xx series of voltage detectors from ROHM Semiconductor. These components are widely used for supervising power rails in various electronic systems. The series offers multiple threshold options to suit different voltage requirements. The BU4922G-TR specifically targets applications needing a 2.2 V detection point. It represents a standard solution for basic power monitoring tasks.

Supervisors Replacement Considerations

The BD5222G-1 is listed as a similar level replacement with the same package and specification. Verify pinout compatibility and electrical parameters before substitution. Ensure the alternative part meets all original design requirements.