BU4238FVE-TR

Overview

The BU4238FVE-TR is a voltage detector with an adjustable delay time, manufactured by ROHM Semiconductor. It features an open-drain output and operates within a reset active voltage range of 0.7 to 7 V. The typical under-voltage detection voltage (Vdet) is 3.8 V with a precision of ±1%. Circuit current is 0.40 μA at Vdet=4.8V when active and 0.55 μA when off. It lacks manual reset, watchdog timer, and automotive qualification. The device is housed in a VSOF5 package.

Feature Summary

• Adjustable reset delay timer functionality
• Open-drain output type for flexible interfacing
• Low power consumption with microampere-level circuit current

Applications

• General purpose voltage monitoring in electronic circuits
• Power supply supervision systems
• Embedded system reset generation

Procurement Notes

Verify the specific ordering suffix and package variant against the official datasheet to ensure compatibility. Confirm the supply status as the component may be subject to end-of-life or last-time-buy notices. Check RoHS compliance documentation for regulatory adherence. Ensure the selected part number matches the required detection voltage and package type for your design.

Selection Notes

Select this component for applications requiring a low-power voltage detector with adjustable reset timing. The open-drain output allows for wired-OR connections. Consider the operating temperature range and supply voltage limits. Verify that the adjustable delay feature meets the system's startup requirements. Compare with similar pinout alternatives if availability is constrained.

Part Context

This part belongs to the BU42xx series of voltage detectors from ROHM. It is designed for supervisory circuits where precise voltage monitoring and controlled reset timing are necessary. The VSOF5 package offers a compact solution for surface-mount applications. It is distinct from fixed-delay or CMOS-output variants in the same family.

Replacement Considerations

BD5238G-1 is listed as a similar level replacement with the same pinout. Verify electrical parameters and package dimensions before substitution.