BD4949FVE-TR

Overview

The BD4949FVE-TR is a CMOS voltage detector IC from ROHM Semiconductor, designed for supervisory circuit applications. It features a threshold voltage of 4.9 V and an overvoltage detection threshold of 4.949 V. The device operates within a supply voltage range up to 10 V and maintains an accuracy of 1%. Key electrical parameters include a reset delay time of 100 us, a maximum power dissipation of 210 mW, and a static current consumption of 850 nA. It supports a wide operating temperature range from -40 C to +105 C.

Feature Summary

• CMOS output type for direct interface with digital logic circuits
• High precision voltage detection with 1% accuracy tolerance
• Ultra-low static current consumption for energy-efficient operation
• Compact VSOF-5 surface mount package design

Applications

• Processor supervisor circuits requiring precise voltage monitoring
• Battery-powered systems needing low quiescent current
• Embedded control units with single-channel voltage supervision
• Industrial equipment operating in extended temperature environments

Procurement Notes

Verify component authenticity through authorized distributors or official manufacturer channels. Confirm RoHS compliance status and datasheet revisions prior to integration. Check for end-of-life status and last-time-buy availability as the product may be discontinued. Ensure packaging specifications match production requirements.

Selection Notes

Select this component when a fixed 4.9 V threshold is required without manual reset functionality. Consider the 850 nA static current for battery life calculations. Verify that the VSOF-5 package fits the PCB layout constraints. Ensure the 10 V maximum supply voltage aligns with system power rails.

Part Context

This part belongs to the BD49 series of standard voltage detectors manufactured by ROHM Semiconductor. The series offers various threshold voltages for different application needs. The BD4949FVE-TR specifically targets applications requiring a 4.9 V detection point with CMOS output characteristics.

Replacement Considerations

BD4945FVE-TR: Similar threshold voltage (4.5 V) and package but different detection level. BD4960FVE-TR: Higher threshold (6.0 V) with identical package and output type. Verify specific voltage requirements before substitution.