BU4344FVE-TR

Overview

The BU4344FVE-TR is a CMOS low voltage detector manufactured by ROHM Semiconductor, designed for supervisory circuit applications. It features a typical under-voltage detection threshold of 4.4 V with a precision of ±1%. The device operates within a supply voltage range of 0.7 V to 7 V and supports an adjustable reset delay timer. It utilizes a VSOF-5 surface-mount package and maintains a low static current of 550 nA. The component functions without manual reset or watchdog capabilities and is rated for operation between -40°C and +125°C.

Feature Summary

• CMOS output type provides digital signal compatibility for system monitoring.
• Adjustable reset delay timer allows customizable timing for power-up sequences.
• Low static current consumption supports energy-efficient battery-powered designs.

Applications

• Portable electronic devices requiring low voltage supervision
• Battery-operated equipment needing power-fail detection
• General-purpose supervisory circuits in consumer electronics

Procurement Notes

Verify the obsolete status and last-time-buy availability through official ROHM channels before procurement planning. Confirm that the VSOF-5 package dimensions match your PCB footprint requirements. Ensure compliance with RoHS directives as specified in the manufacturer documentation. Check for any regional distribution restrictions that may affect sourcing.

Selection Notes

Select this component when a fixed 4.4 V threshold with adjustable delay is required. Compare against the BD5244G-1 if open-drain output or different packaging is preferred. Consider the operating temperature range and supply voltage limits relative to your specific application environment. Verify pinout compatibility if replacing existing designs.

Part Context

This part belongs to the BU42(43)xxFVE series of voltage detectors from ROHM Semiconductor. It is classified as a simple reset/power-on-reset circuit without additional features like watchdog timers or manual resets. The device is intended for general industrial and commercial applications rather than automotive environments.

Replacement Considerations

The BD5244G-1 is listed as a recommended replacement with similar specifications but features an open-drain output instead of CMOS. Both parts share the same detection voltage but differ in output configuration and package type (SSOP5 vs VSOF-5).

FAQ

Does the BU4344FVE-TR include a manual reset function?

No, the device does not support manual reset functionality.

What is the maximum operating temperature for this component?

The maximum operating temperature is +125°C.