BU4920F-TR

Supervisors Overview

The BU4920F-TR is a standard CMOS voltage detector IC manufactured by ROHM Semiconductor, designed for supervisory circuit applications. It features a fixed under-voltage detection threshold of 2.0 V with a precision accuracy of ±1%. The device operates within a supply voltage range of 0.7 V to 7 V and provides a CMOS output type without manual reset or watchdog timer functions. It is housed in a compact SOP-4 surface-mount package suitable for space-constrained designs. The component supports an extended industrial operating temperature range from -40 °C to +125 °C, ensuring reliable performance in various environmental conditions.

Supervisors Feature Summary

• Fixed 2.0 V detection threshold with high accuracy
• Ultra-low current consumption design
• CMOS output interface without manual reset

Supervisors Applications

• Portable electronic device power monitoring
• Battery-operated system supervision
• Microcontroller reset circuitry

Supervisors Procurement Notes

Verify the specific suffix 'TR' indicates tape-and-reel packaging when sourcing. Confirm RoHS compliance status through official documentation as requirements may vary by region. Check the lifecycle status, as this part may be subject to obsolescence notices. Ensure the SOP-4 package dimensions match your PCB footprint requirements before finalizing procurement orders.

Supervisors Selection Notes

Select this component when a fixed 2.0 V threshold is required for low-voltage systems. Consider the SOP-4 package size if board space is limited compared to larger packages. Evaluate the CMOS output capability against open-drain alternatives if pull-up resistor integration is preferred. Verify that the absence of a watchdog timer aligns with the system's fault management strategy.

Supervisors Part Context

This part belongs to the BU49xx series of standard voltage detectors from ROHM Semiconductor. The series offers various detection voltages in 0.1 V steps to accommodate different application needs. The BU4920F-TR specifically targets cost-sensitive applications requiring basic voltage supervision without complex timing features.

Supervisors Replacement Considerations

The BD5220G-1 is listed as a similar specification replacement option. Verify package compatibility between SOP-4 and SSOP-5 formats during substitution.