BU45K282G-TL

Supervisors Overview

The BU45K282G-TL is a voltage detector IC from the ROHM BU45 series, designed for monitoring single-input power supplies. It features a fixed threshold voltage of 2.8 V with an accuracy of ±1%. The device operates within a supply voltage range of 0.6 V to 6 V and draws a typical operating current of 2.8 µA. It provides an open-drain output with a fixed reset delay time of 200 ms. The component is housed in an SOT-23-3 package and supports operation across a temperature range of -40°C to +105°C.

Supervisors Feature Summary

• Built-in counter timer delay circuit eliminates the need for external capacitors for delay setting
• High detection accuracy of ±1% ensures reliable voltage supervision
• Low current consumption design suitable for battery-powered applications
• Fixed reset delay time removes requirement for external timing components

Supervisors Applications

• Microprocessor system reset circuits
• Battery voltage monitoring
• Power supply supervision in portable devices
• Embedded system voltage tracking

Supervisors Procurement Notes

Verify the specific suffix TL indicates reel packaging when ordering. Confirm the SSOP-3 or SOT-23-3 package designation matches your PCB footprint requirements, as source data contains conflicting package listings. Check RoHS compliance details directly on the manufacturer datasheet before finalizing procurement specifications.

Supervisors Selection Notes

Select this component for designs requiring a fixed 2.8 V threshold with minimal external component count. The low quiescent current makes it appropriate for energy-sensitive systems. Ensure the open-drain output configuration aligns with the downstream logic interface requirements. Verify thermal performance within the specified -40°C to +105°C operational range.

Supervisors Part Context

This part belongs to the BU45/BU46 series of voltage detectors from ROHM Semiconductor. These ICs are characterized by high accuracy and low power consumption. The BU45K282G-TL specifically offers a 2.8 V detection threshold. The series is designed to simplify circuit design by integrating delay timers internally, reducing board space and component count compared to discrete solutions.

Supervisors Replacement Considerations

The BD5228G-1TR is listed as a similar specification replacement. Note that the substitute uses an SSOP-5 package instead of the original's SOT-23-3/SSOP-3 form factor. The replacement offers adjustable delay rather than fixed delay, which may require circuit modification.