BD4843FVE-TR

Overview

The BD4843FVE-TR is a CMOS supervisory circuit manufactured by ROHM Semiconductor, designed for voltage detection applications. It features a fixed detection threshold voltage of 4.6V with an additional specification noting a 4.3V detection threshold in some contexts. The device operates within a supply voltage range up to 10V and includes a reset delay timer of 100 microseconds. It utilizes a VSOF-5 (SOIC) package with five terminals. The component supports an operating temperature range from -40°C to +105°C and offers high accuracy of 1%. It functions as a power supply support circuit without manual reset or watchdog capabilities.

Feature Summary

• CMOS technology ensures low current consumption and reliable voltage monitoring.
• Fixed threshold voltage detection provides precise supervision of power rails.
• Integrated reset delay timer prevents false triggering during transient conditions.
• Compact VSOF-5 surface-mount package facilitates efficient PCB layout.

Applications

• Portable equipment requiring stable power supply monitoring
• Battery-operated devices needing under-voltage detection
• General-purpose electronic systems requiring reset signal generation

Procurement Notes

Verify the specific datasheet version to confirm the exact detection threshold voltage, as sources indicate variations between 4.3V and 4.6V. Ensure the VSOF-5 package footprint matches your design requirements. Confirm RoHS compliance status if required by your manufacturing standards. Check for any obsolescence notices or recommended replacement parts before finalizing procurement plans.

Selection Notes

Select this component when a fixed voltage threshold is sufficient for the application. Consider the 1% accuracy and 100us delay for timing-sensitive reset circuits. Evaluate the -40°C to +105°C temperature range against environmental conditions. Compare with adjustable threshold alternatives if system voltages vary significantly.

Part Context

This part belongs to the BD48 series of standard voltage detectors from ROHM Semiconductor. These ICs are designed for monitoring power supply voltages in consumer electronics and industrial applications. The series typically offers various threshold options and package types to suit different design constraints while maintaining CMOS efficiency.

Replacement Considerations

BD4853FVE-TR: Similar supervisory circuit but with a higher detection threshold of 5.6V. Verify that the increased threshold does not compromise system safety margins. Other BU48xx series variants may offer similar functionality with different thresholds or packages.