BU46K274G-TL

Overview

The BU46K274G-TL is a voltage detector IC from the ROHM BU45/BU46 series, designed for monitoring single-input power supplies. It features a CMOS output and operates within a supply voltage range of 0.6 V to 6 V. The device triggers at a precise threshold voltage of 2.7 V with an accuracy of ±1%. It includes a built-in reset delay timer of 400 ms, eliminating the need for external capacitors. The component consumes a quiescent current of 2.8 µA and functions reliably across a temperature range of -40°C to +105°C. It is housed in an SSOP-3 package.

Feature Summary

• Integrated counter timer delay circuit removes requirement for external timing capacitors
• High detection accuracy maintained at ±1% tolerance level
• Ultra-low current consumption supports battery-powered applications
• CMOS output structure ensures compatibility with digital logic interfaces

Applications

• Portable electronic devices requiring low standby current
• Microprocessor system reset circuits
• Battery-operated equipment power management
• Embedded systems voltage supervision

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status via official documentation. Check current lifecycle status as this part may be discontinued or not recommended for new designs. Ensure storage conditions account for moisture sensitivity classification prior to surface mount assembly.

Selection Notes

Select this component when a fixed 2.7 V threshold is required for single-channel voltage monitoring. Consider the SSOP-3 package constraints for PCB layout. Evaluate the 400 ms reset delay against system startup requirements. Compare quiescent current specifications against alternative supervisory circuits if lower power consumption is critical for the target application.

Part Context

This voltage detector belongs to the BU45/BU46 series of supervisory circuits manufactured by ROHM Semiconductor. The series is characterized by high accuracy and low power consumption. The BU46K274G-TL specifically utilizes the K-series threshold designation and G-package variant. It serves as a dedicated power management integrated circuit within the broader PMIC category.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source data. Verify functional equivalence with other BU46 series variants if threshold adjustments are acceptable. Consult manufacturer documentation for potential end-of-life alternatives.