BU4339FVE-TR

Overview

The BU4339FVE-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-input supply voltages. It features an adjustable reset delay timer and operates within a maximum supply voltage of 7 V. The device provides a threshold detection voltage of 3.9 V with a precision of ±1%. It utilizes a VSOF-5 surface-mount package and supports operation across a temperature range from -40°C to +125°C. The circuit draws a typical operating current of 0.40 μA at the detection voltage.

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 systems needing precise under-voltage monitoring
• General-purpose supervisory circuits in consumer electronics

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for end-of-life notices, as this part may be subject to discontinuation. Ensure packaging specifications match production requirements before finalizing orders.

Selection Notes

Select this component when a fixed 3.9 V threshold with adjustable delay is required. Compare against similar parts like BD5239G-1 if open-drain outputs or different packages are preferred. Verify that the VSOF-5 footprint fits the design constraints and that the 7 V maximum rating suits the target application voltage.

Part Context

This part belongs to the BU42(43)xxFVE series of voltage detectors. It shares family characteristics such as CMOS output and adjustable delay functionality with other members like BU4334FVE-TR and BU4311FVE-TR, differentiated primarily by their specific detection thresholds.

Replacement Considerations

BD5239G-1 is listed as a recommended replacement with similar specifications but differs in package type (SSOP5 vs VSOF5) and output structure (open drain vs CMOS). Verify pinout compatibility and electrical parameter alignment before substitution.