BU4911F-TR

Supervisors Overview

The BU4911F-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-input power supply voltages. It operates within a supply voltage range of 0.7 V to 7 V and features a typical threshold voltage of 1.1 V with an accuracy of ±1%. The device provides a CMOS output type without manual reset or watchdog timer capabilities. It functions reliably across a temperature range of -40°C to +125°C. Key electrical characteristics include a static current of 300 nA and a maximum power dissipation of 400 mW. The component is housed in an SOP-4 package.

Supervisors Feature Summary

• CMOS output interface for direct logic compatibility
• High detection accuracy with ±1% threshold precision
• Low static current consumption for energy efficiency
• Wide operating temperature range suitable for industrial environments

Supervisors Applications

• Portable electronic devices requiring low standby current
• Battery-powered systems needing reliable voltage supervision
• Industrial control circuits operating in extreme temperatures
• Embedded systems utilizing CMOS logic families

Supervisors Procurement Notes

Verify the obsolete status of this component before procurement planning. Confirm availability through authorized distributors or secondary markets. Ensure replacement strategies are defined due to discontinuation. Check RoHS compliance documentation for regulatory requirements. Validate pinout compatibility if integrating into existing designs.

Supervisors Selection Notes

Select this component for applications requiring precise voltage monitoring with minimal power draw. Consider the SOP-4 package constraints for PCB layout. Evaluate the lack of reset delay against system timing requirements. Compare performance metrics with active alternatives if long-term supply is critical. Assess thermal management needs based on the specified power dissipation limits.

Supervisors Part Context

This part belongs to the BU4911F series of standard voltage detectors from ROHM Semiconductor. It is classified under supervisory circuits within the PMIC category. The specific suffix indicates tape and reel packaging. The series is known for high accuracy and low current consumption in compact packages.

Supervisors Replacement Considerations

BD5211G-1TR is listed as a recommended replacement with similar specifications. Note differences in package type (SSOP-5 vs SOP-4) and output structure (open drain vs CMOS). Verify pinout compatibility and electrical parameter alignment before substitution.