BU4209G-TR

Overview

The BU4209G-TR is a voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply voltages. It features an adjustable reset delay timer and an open-drain output type. The typical under-voltage detection voltage is 0.9V with a precision of ±1%. The reset active voltage range spans from 0.7V to 7V. The device operates within a temperature range of -40°C to +125°C. Circuit current is specified at 0.40μA (ON) and 0.55μA (OFF) at VDET=4.8V. Hysteresis voltage is defined as VDET x 0.05. The component is supplied in an SSOP-5 package with a unit quantity of 3000.

Feature Summary

• Adjustable reset delay timer functionality
• Open-drain output configuration
• Low circuit current consumption

Applications

• Power supply supervision
• Microprocessor reset circuits
• Battery-powered device monitoring

Procurement Notes

Verify the specific suffix 'G' against official ROHM documentation to confirm package and tape/reel specifications. Confirm RoHS compliance status directly from the datasheet. Ensure the ordering part number matches the required packaging format. Check supply status as components may be subject to change or end-of-life notices.

Selection Notes

Select this component when an adjustable delay time is required for system reset sequencing. Verify that the open-drain output interface is compatible with the downstream logic levels. Ensure the operating voltage range covers the minimum and maximum supply voltages of the application. Confirm thermal performance meets the -40°C to +125°C requirement.

Part Context

The BU4209G-TR belongs to the BU42 series of standard voltage detectors from ROHM. This series provides low-power supervision solutions for various electronic systems. The 'TR' suffix indicates tape and reel packaging for automated assembly. Related parts in the family include variants with different detection voltages and fixed delay times.

Replacement Considerations

BD5209G-1 is listed as a similar level replacement with the same pinout.