BU4846G-TR

Supervisors Overview

The BU4846G-TR is a CMOS voltage detector IC from ROHM Semiconductor, designed for monitoring single-input power supply lines. It features an open-drain output and operates within a supply voltage range of 0.9 V to 7 V. The device detects under-voltage conditions with a typical threshold of 4.6 V and maintains a precision accuracy of ±1%. It consumes a maximum operating current of 550 nA and dissipates up to 540 mW. The component functions reliably across an extended temperature range from -40°C to +125°C and is housed in a compact SSOP-5 surface-mount package.

Supervisors Feature Summary

• CMOS technology enables ultra-low power consumption suitable for battery-operated systems
• Open-drain output interface allows flexible connection to various logic families
• High detection accuracy ensures reliable system reset during voltage fluctuations
• Extended industrial temperature rating supports operation in harsh environments

Supervisors Applications

• Portable electronic devices requiring low standby current
• Industrial control systems needing stable voltage supervision
• Consumer electronics with limited power budgets
• Automotive infotainment and non-critical safety circuits

Supervisors Procurement Notes

Verify the specific suffix G-TR against official ROHM documentation to confirm packaging type and tape-and-reel specifications. Confirm RoHS compliance status through the manufacturer's latest environmental declaration. Check for any regional distribution restrictions or end-of-life notices prior to procurement planning. Ensure compatibility with existing PCB footprint designs utilizing the SSOP-5 package dimensions.

Supervisors Selection Notes

Select this component when a fixed 4.6 V threshold is required for single-channel voltage monitoring. Consider the open-drain output capability if interfacing with different logic voltage levels. Evaluate the 550 nA current consumption against total system power budgets. Verify that the SSOP-5 package fits within the available board space constraints compared to alternative packages like SOP or SOT.

Supervisors Part Context

This part belongs to the BU4846 series of standard voltage detectors manufactured by ROHM Semiconductor. It serves as a dedicated supervisory circuit for maintaining system integrity by detecting under-voltage events. The series includes variants with different threshold voltages to accommodate various rail requirements. This specific model represents a discontinued or not recommended for new design product according to distributor listings.

Supervisors Replacement Considerations

The BD5246G-1 is listed as a similar specification replacement with comparable electrical characteristics. Verify pinout compatibility and package differences between SSOP-5 variants before substitution.