BU4844F-TR

Supervisors Overview

The BU4844F-TR is a CMOS voltage detector IC manufactured by ROHM Semiconductor, designed for supervisory circuit applications. It features a fixed threshold voltage of 4.4 V with an accuracy of ±1%. The device operates within a supply voltage range of 0.7 V to 7 V and draws a typical static current of 550 nA. It utilizes an open-drain output type without manual reset or watchdog timer functions. The component is housed in a VSOF-5 package and supports operation across a temperature range of -40°C to +125°C.

Supervisors Feature Summary

• CMOS technology ensures low power consumption suitable for battery-operated systems
• Fixed threshold detection provides precise voltage monitoring without external components
• Open-drain output allows flexible interfacing with various logic families

Supervisors Applications

• Portable electronic devices requiring voltage supervision
• Battery-powered equipment needing under-voltage detection
• General-purpose supervisory circuits in consumer electronics

Supervisors Procurement Notes

Verify the obsolete status of this part number before procurement planning. Confirm availability through authorized distributors or secondary market sources as standard supply channels may not stock this item. Ensure compatibility with existing designs due to potential lead time variations associated with end-of-life components.

Supervisors Selection Notes

Select this component when a fixed 4.4 V threshold is required for voltage monitoring. Consider the VSOF-5 package constraints for PCB layout. Evaluate the open-drain output requirements against system logic levels. Verify that the absence of a watchdog timer meets application safety needs.

Supervisors Part Context

This component belongs to the BU4844 series of standard voltage detectors from ROHM Semiconductor. It is part of a family of CMOS voltage detection ICs designed for compact, low-power applications. The specific suffix indicates tape and reel packaging for automated assembly processes.

Supervisors Replacement Considerations

The BD5244G-1 is listed as a recommended replacement with similar specifications. Note differences in package type (SSOP-5 vs VSOF-5) and slight variations in precision and current consumption during verification.