BU4211G-TR

Overview

The BU4211G-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for supervising power supply voltages. It features a fixed detection threshold of 1.1V with an accuracy of ±1%. The device provides a low-active reset signal via an open-drain output and includes an adjustable or selectable reset delay timer. It operates within a supply voltage range up to 7V and supports surface-mount installation in a 5-SSOP package. The component functions reliably across an extended temperature range from -40°C to +125°C.

Feature Summary

• Provides simple reset or power-on-reset functionality with a low-active output state.
• Features an adjustable or selectable reset delay timer for flexible timing control.
• Utilizes an open-drain or open-collector output interface for system integration.

Applications

• Monitoring power supply voltages in electronic circuits
• Implementing simple reset mechanisms for microprocessors
• Power-on reset generation in embedded systems

Procurement Notes

Verify the specific ordering suffix to confirm the packaging type, as the part is available in both reel and cut tape configurations. Confirm that the selected variant meets the required threshold voltage and delay time specifications for the target application. Check current availability status, as this component may be subject to lifecycle restrictions or minimum order quantity requirements depending on the distributor.

Selection Notes

Select this component when a fixed 1.1V detection threshold is required for low-voltage monitoring applications. Ensure the design accommodates the open-drain output configuration and utilizes external components if specific delay times are needed beyond the internal options. Verify that the operating temperature range and supply voltage limits align with the system's environmental and electrical constraints.

Part Context

This component belongs to the BU42 series of supervisory circuits from ROHM Semiconductor. These devices are classified under PMIC - Power Management ICs and specifically fall into the Voltage Detector subcategory. The series is designed for general-purpose power supply supervision, offering reliable performance in compact surface-mount packages suitable for modern electronic designs.

Replacement Considerations

Public confirmed substitute part numbers are not explicitly documented in the provided source material for direct replacement. Designers should consult official manufacturer documentation for potential cross-references or updated product recommendations, as this item may be marked as Not Recommended for New Designs (NRND) in some contexts.