BU4930G-TR

Supervisors Overview

The BU4930G-TR is a standard CMOS voltage detector IC from ROHM Semiconductor, designed for processor supervision. It features an 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. It consumes a circuit current of 0.40μA (ON) and 0.55μA (OFF) at VDET=4.8V. Hysteresis is set at VDET x 0.05. The component is housed in an SSOP-5 package (2.9x2.8mm, t=1.25mm) and supports an operating temperature range from -40°C to 125°C.

Supervisors Feature Summary

• High-accuracy voltage monitoring with ±1% detection precision
• Low current consumption suitable for battery-powered applications
• CMOS output interface compatible with standard logic families
• Built-in hysteresis to prevent output oscillation during threshold transitions

Supervisors Applications

• Processor supervisor circuits requiring stable power monitoring
• Embedded systems needing reliable under-voltage detection
• Portable electronic devices utilizing low-power CMOS logic

Supervisors Procurement Notes

Verify the specific suffix and package variant against the official datasheet before ordering. Confirm that the supply status aligns with project requirements, as this component may be designated Not Recommended for New Designs. Ensure compatibility with existing PCB footprints and thermal management specifications. Cross-reference the ordering part number to avoid discrepancies between tape-and-reel quantities and minimum packing requirements.

Supervisors Selection Notes

Select this component when a fixed 3.0V detection threshold is required for system supervision. Consider the CMOS output drive capability and the absence of a manual reset or watchdog timer. Evaluate the operating temperature range against environmental conditions. Compare performance metrics such as hysteresis width and standby current against alternative supervisory circuits if lower power or additional features are needed.

Supervisors Part Context

The BU49xx series represents ROHM's standard CMOS reset IC lineup, offering high accuracy and low current consumption. This series provides detection voltages ranging from 0.9V to 4.8V in 0.1V increments, allowing precise selection based on application needs. The BU4930G-TR specifically addresses the 3.0V threshold requirement within this family, maintaining consistent package dimensions and electrical characteristics across similar variants.

Supervisors Replacement Considerations

The BD5230G-1TR is a recommended replacement with the same SSOP-5 package. It offers similar detection voltage but features an open-drain output and adjustable delay timer. Verify pinout compatibility and output stage differences before substitution.