BU4344F-TR

Overview

The BU4344F-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply voltages. It features an adjustable threshold voltage of 4.4 V with a precision of ±1%. The device operates within a supply voltage range of 0.9 V to 7 V and supports an adjustable reset delay timer. It consumes a typical operating current of 550 nA and offers a CMOS output type. The component is housed in a SOP-4 package and functions across a temperature range of -40°C to +125°C.

Feature Summary

• CMOS technology ensures low power consumption suitable for battery-operated applications.
• Adjustable reset delay timer allows customization of response timing via external components.
• High accuracy voltage detection with ±1% precision for reliable system supervision.

Applications

• Portable electronic devices requiring low standby current
• Battery-powered equipment needing under-voltage protection
• General-purpose supervisory circuits in consumer electronics

Procurement Notes

Verify the obsolete status of this component before integration into new designs. Confirm availability through authorized distributors or secondary markets. Ensure compatibility with existing PCB footprints if replacing older inventory. Check RoHS compliance documentation for regulatory adherence. Validate lead times as production may be limited.

Selection Notes

Select this part when a fixed 4.4 V threshold with adjustable delay is required. Consider the SOP-4 package constraints for space-limited designs. Evaluate the 550 nA current draw against total system budget. Compare performance against newer alternatives like the BD5244G-1 if long-term supply stability is critical.

Part Context

This component belongs to the BU42(43)xxF series of voltage detectors from ROHM. It is part of a family offering various threshold voltages and packages. The BU4344F-TR specifically targets applications needing precise under-voltage detection with customizable reset timing characteristics.

Replacement Considerations

The BD5244G-1 is listed as a recommended replacement with the same pinout and similar specifications. Verify package differences between SOP-4 and SSOP5 during transition.