BU4247F-TR

Overview

The BU4247F-TR is a voltage detector with an adjustable delay time, manufactured by ROHM Semiconductor. It features a typical under-voltage detection voltage of 4.7 V with ±1% precision. The reset active voltage range spans from 0.7 V to 7 V, utilizing an open drain output type. The device operates within a temperature range of -40 °C to +125 °C. Circuit current is specified at 0.40 μA (VDet=4.8V) when active and 0.55 μA when off. It is housed in an SOP-4 package.

Feature Summary

• Adjustable reset delay timer functionality
• Open drain output configuration
• Low power consumption design

Applications

• Portable equipment monitoring
• Battery-powered systems supervision
• General electronic circuit protection

Procurement Notes

Verify the supply status as End-of-Life or Last Time Buy before procurement planning. Confirm that the SOP-4 package matches the target PCB footprint. Ensure the adjustable delay time external components are selected according to the official datasheet specifications to meet timing requirements.

Selection Notes

Select this component for applications requiring a fixed 4.7 V threshold with adjustable reset delay. Compare against the BU4247G-1 for SSOP-5 package alternatives if pinout compatibility allows. Verify that the open drain output suits the downstream logic interface without additional pull-up requirements beyond standard design practices.

Part Context

This part belongs to the BU42(43)xxF series of voltage detectors. It serves as a supervisory circuit for monitoring power supply voltages in low-power electronic devices. The TR suffix indicates tape and reel packaging for automated assembly processes.

Replacement Considerations

The BD5247G-1 is listed as a similar level replacement with the same pinout. Verify package differences between SOP-4 and SSOP-5 during substitution.