BD4942FVE-TR

Overview

The BD4942FVE-TR is a standard voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-channel power supply voltages. It operates within a supply voltage range of 0.95 V to 10 V and features a typical under-voltage detection threshold of 4.2 V with a precision of ±1%. The device utilizes a CMOS output type with a low active state and includes a reset delay timer of 100 µs. It functions reliably across an extended temperature range from -40°C to +105°C. The component draws a circuit current of approximately 0.60 µA at 4.8 V when active and 0.85 µA when inactive. It is housed in a compact VSOF5 package measuring 1.6 x 1.6 mm with a thickness of 0.6 mm.

Feature Summary

• CMOS output structure providing low active state signaling for system reset control
• Integrated 100 µs reset delay timer to ensure stable power-up sequences
• High detection accuracy of ±1% for precise voltage threshold monitoring
• Extended operating temperature range suitable for industrial environments

Applications

• Monitoring main power rails in embedded systems
• Supervising battery-powered devices requiring low quiescent current
• Industrial control units needing reliable voltage supervision
• Consumer electronics with strict power management requirements

Procurement Notes

Verify the specific suffix TR indicates tape and reel packaging configuration. Confirm RoHS compliance status through official manufacturer documentation. Check current supply status as this part may be subject to end-of-life notices or last-time buy conditions. Ensure the VSOF5 package dimensions match your PCB footprint requirements. Validate that the 4.2 V detection threshold aligns with your system's voltage specifications.

Selection Notes

Select this component when a CMOS output interface is required instead of open-drain configurations. Consider the 100 µs fixed delay timer if programmable delays are not necessary. Evaluate the VSOF5 package size against available board space constraints. Compare the ±1% accuracy against applications demanding tighter tolerances. Assess the 0.95 V minimum operating voltage against your lowest expected supply levels.

Part Context

This component belongs to the BD49 series of standard voltage detectors from ROHM Semiconductor. It is part of a family of supervisory circuits designed for general-purpose power monitoring. The VSOF5 package represents a small form-factor option compared to traditional SOT packages. The series typically offers various detection voltages to accommodate different rail monitoring needs.

Replacement Considerations

BD5242G-1 is listed as a similar specification replacement with SSOP5 packaging and adjustable delay timer.