BU4919FVE-TR

Supervisors Overview

The BU4919FVE-TR is a standard CMOS voltage detector IC manufactured by Rohm Semiconductor. It features a fixed detection threshold voltage of 1.9V with a precision of ±1%. The device operates within a reset active voltage range of 0.7V to 7V and consumes ultra-low current, typically 0.40µA in the ON state and 0.55µA in the OFF state at VDET=4.8V. It utilizes an open-drain output type and includes hysteresis voltage defined as VDET x 0.05. The component is housed in a VSOF5 package and supports an operating temperature range from -40°C to +125°C.

Supervisors Feature Summary

• Ultra-low current consumption for extended battery life
• High accuracy voltage detection with ±1% precision
• Wide operating voltage range supporting various power rails
• Integrated hysteresis to prevent output oscillation

Supervisors Applications

• Portable electronic devices requiring low standby current
• Battery-powered systems needing reliable power monitoring
• General purpose voltage supervision in embedded circuits

Supervisors Procurement Notes

Verify the specific suffix FVE corresponds to the VSOF5 package and open-drain output configuration required for your design. Confirm that the 1.9V threshold aligns with your system's under-voltage detection requirements. Check for end-of-life status or last-time-buy notices as availability may be limited. Ensure thermal management meets the specified -40°C to +125°C operating range for your application environment.

Supervisors Selection Notes

Select this component when a fixed 1.9V threshold is appropriate for the monitored rail. The open-drain output requires an external pull-up resistor; ensure compatibility with the target logic levels. Compare current consumption specifications against other series members if lower power is critical. Verify package dimensions fit the PCB layout constraints compared to alternative packages like SSOP5.

Supervisors Part Context

This part belongs to the BU49xx series of standard CMOS voltage detectors from Rohm. The series offers detection voltages from 0.9V to 4.8V in 0.1V steps. The BU4919 variant specifically targets applications requiring a 1.9V detection point. It shares family characteristics such as high accuracy and low current but differs in threshold voltage and potentially output stage depending on the specific model suffix.

Supervisors Replacement Considerations

The BD5219G-1 is listed as a similar specification replacement. Note differences in package (SSOP5 vs VSOF5) and output type (open drain vs CMOS). Verify electrical parameters match before substitution.