BU4942FVE-TR

Supervisors Overview

The BU4942FVE-TR is a standard voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-channel power supply voltages. It operates within a detection voltage range of 0.7 V to 7 V and features a typical under-voltage detection threshold of 4.2 V with ±1% precision. The device utilizes a CMOS output type and lacks manual reset or watchdog timer functions. It is housed in a VSOF5 package (1.6x1.6 mm) and supports a wide operating temperature range from -40°C to 125°C.

Supervisors Feature Summary

• CMOS output structure for low power consumption
• High detection accuracy with ±1% precision
• Compact VSOF5 surface mount package

Supervisors Applications

• Portable equipment battery voltage monitoring
• Microprocessor system reset circuits
• General purpose voltage supervision

Supervisors Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm package integrity upon receipt as the VSOF5 form factor is sensitive to handling. Ensure design compatibility with existing PCB footprints before finalizing procurement decisions for legacy systems.

Supervisors Selection Notes

Select this component when a compact footprint and high precision are required for single-supervision applications. Consider the CMOS output capability for direct interface with digital logic. Evaluate thermal requirements against the specified operating temperature range for the target environment.

Supervisors Part Context

This part belongs to the BU49xx series of standard voltage detectors from ROHM. It serves as a successor or alternative to older SSOP5 packaged variants like the BU4942G, offering a significantly smaller physical profile while maintaining similar electrical characteristics for space-constrained designs.

Supervisors Replacement Considerations

The BD5242G-1 is listed as a recommended replacement with similar specifications. Note that the substitute uses an SSOP5 package rather than VSOF5, requiring PCB layout adjustments for pin compatibility and mechanical fit.