BU4211F-TR

Overview

The BU4211F-TR is a CMOS voltage detector IC from ROHM Semiconductor, designed for low-voltage monitoring applications. It features an adjustable reset delay time and operates within a supply voltage range of 0.7 V to 7 V. The device provides a detection threshold voltage of 1.1 V with high accuracy of ±1%. It utilizes an open-drain output type and lacks manual reset or watchdog timer functions. The component supports surface-mount installation in an SOP-4 package and maintains functionality across an extended temperature range from -40°C to +125°C.

Feature Summary

• Adjustable output delay time setting capability
• High precision voltage detection with ±1% accuracy
• Ultra-low current consumption characteristics

Applications

• Portable equipment power management
• Battery-operated system supervision
• Microprocessor reset circuits

Procurement Notes

Verify the specific suffix 'TR' indicates tape-and-reel packaging configuration. Confirm RoHS compliance status through official documentation. Check current lifecycle status as this series may be subject to discontinuation or last-time-buy notices. Ensure the SOP-4 package variant matches design requirements.

Selection Notes

Select this component when precise low-voltage monitoring is required with customizable response timing. The open-drain output allows flexible interfacing with various logic families. Consider the wide operating temperature range for industrial or automotive environments where standard commercial grades are insufficient.

Part Context

This part belongs to the BU42xx series of CMOS voltage detectors. These devices are engineered for compact designs requiring minimal quiescent current. The series offers multiple threshold options and package types to suit diverse embedded system constraints.

Replacement Considerations

BD5211G-1 is listed as a recommended replacement with same pinout compatibility.