BU4346FVE-TR

Overview

The BU4346FVE-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-input power 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 4.6 V with an accuracy of 1%. It functions across a wide temperature range from -40°C to +125°C and consumes a typical operating current of 550 nA. The component is housed in a VSOF-5 surface-mount package and includes an overvoltage threshold of 4.646 V.

Feature Summary

• CMOS output type for low-voltage detection applications
• Adjustable reset delay timer functionality
• High precision voltage detection with 1% accuracy

Applications

• Power supply supervision in electronic circuits
• Low voltage detection systems
• Microprocessor reset circuitry

Procurement Notes

Verify the obsolete status of this component before procurement planning, as it is listed as discontinued or last time buy. Confirm availability through authorized distributors or secondary markets if standard channels are unavailable. Ensure that the VSOF-5 package dimensions match the target PCB footprint. Check RoHS compliance details on the official datasheet to meet environmental regulations. Validate the specific ordering suffix requirements for tape and reel packaging quantities.

Selection Notes

Select this component when a precise 4.6 V threshold is required for single-channel voltage monitoring. The adjustable delay feature allows customization of reset timing without external components. Consider the low 550 nA current consumption for battery-powered or energy-efficient designs. The wide operating temperature range supports industrial or automotive environments, though the part lacks automotive-specific certification. Compare against the BD5246G-1 for potential pin-compatible alternatives if supply constraints exist.

Part Context

This part belongs to the BU42(43)xxFVE series of voltage detectors from ROHM Semiconductor. It shares functional similarities with other models in the family, such as the BU4341FVE-TR and BU4342FVE-TR, which differ primarily in their detection threshold voltages. The FVE suffix indicates the VSOF-5 package type. Related variants include the BU4346G series, which utilizes an SSOP-5 package instead.

Replacement Considerations

The BD5246G-1 is identified as a recommended replacement with the same pinout. Note that the BD5246G-1 uses an SSOP-5 package compared to the VSOF-5 of the BU4346FVE-TR. Verify mechanical fit and electrical compatibility, particularly regarding the open-drain output of the replacement versus the CMOS push-pull output of the original.