BU4930F-TR

Supervisors Overview

The BU4930F-TR is a standard voltage detector manufactured by ROHM Semiconductor, currently designated as Last Time Buy. It features a typical under-voltage detection threshold of 3.0V with a precision of ±1%. The device operates within a reset active voltage range of 0.7V to 7V and utilizes a CMOS output type with a low active state. Key electrical characteristics include a circuit current of 0.40μA (ON) and 0.55μA (OFF) at VDET=4.8V, alongside a hysteresis voltage defined as VDET x 0.05. It supports an L output current of 3.3mA (LowVol) and 6.5mA (HighVol), functioning across a temperature range of -40°C to 125°C in an SOP4 package.

Supervisors Feature Summary

• CMOS output architecture providing low active state signaling for system reset control
• Integrated hysteresis mechanism set at five percent of the detection voltage to prevent output oscillation
• Compact SOP4 surface-mount packaging suitable for space-constrained electronic designs

Supervisors Applications

• Portable battery-powered devices requiring reliable power supply monitoring
• Embedded systems needing under-voltage protection logic
• General-purpose industrial equipment supervisory circuits

Supervisors Procurement Notes

Verify component authenticity through authorized channels due to the Last Time Buy status. Confirm final design compatibility with the specified SOP4 footprint and electrical parameters before procurement. Ensure supply chain stability for remaining inventory needs as manufacturing discontinuation is imminent. Cross-reference datasheet revisions for any potential updates prior to final integration.

Supervisors Selection Notes

Select this component when a fixed 3.0V detection threshold with CMOS output is required. Consider the ±1% precision and specific hysteresis characteristics for noise immunity. Evaluate the operating temperature range and package dimensions against board layout constraints. Compare against similar specifications if future availability is a primary concern.

Supervisors Part Context

This part belongs to the BU4930 series of standard voltage detectors from ROHM Semiconductor. It serves as a legacy option for simple voltage supervision tasks without complex timing or manual reset features. The series provides basic under-voltage detection capabilities for general electronics applications.

Supervisors Replacement Considerations

BD5230G-1TR is listed as a recommended replacement with similar specifications. Note that the substitute uses an SSOP5 package and open-drain output, requiring pinout and interface adaptation during transition.