BU45K254G-TL

Supervisors Overview

The BU45K254G-TL is a fixed-delay type voltage detector IC from ROHM Semiconductor, designed for monitoring power supply voltages. It features an open-drain output and operates within a detection voltage range of 0.6V to 6V. The device has a typical under-voltage detection threshold of 2.5V with ±1% precision. It includes a built-in fixed delay timer of 400ms, eliminating the need for external capacitors. The IC consumes low current (2.3μA ON, 2.8μA OFF) and supports a wide operating temperature range from -40°C to +105°C in an SSOP-3 package.

Supervisors Feature Summary

• Built-in fixed delay timer circuit eliminates the need for external timing components
• High accuracy voltage detection with ±1% precision
• Low current consumption suitable for battery-powered applications
• Wide operating voltage range from 0.6V to 6V

Supervisors Applications

• Power supply monitoring in portable electronic devices
• Reset signal generation for microcontrollers
• Battery voltage level detection systems
• Embedded system supervision circuits

Supervisors Procurement Notes

Verify the exact detection voltage and package variant during procurement, as suffixes may indicate specific testing or binning criteria. Confirm availability status, as this component may be subject to lifecycle changes. Ensure compatibility with existing board layouts regarding the SSOP-3 footprint and pin configuration. Cross-reference with official ROHM documentation for any recent design rule updates or recommended replacement parts if the item is obsolete.

Supervisors Selection Notes

Select this component when a fixed 400ms reset delay is required without external capacitors. Choose based on the 2.5V detection threshold and ±1% accuracy requirements. Consider the SSOP-3 package size constraints and the 0.6V to 6V input voltage range. Evaluate the low current consumption against battery life requirements. Verify thermal performance within the -40°C to +105°C operating range for the target application environment.

Supervisors Part Context

The BU45K254G-TL belongs to the BU45/BU46 series of voltage detectors from ROHM Semiconductor. This series is characterized by high accuracy and low current consumption CMOS technology. The 'K' suffix typically denotes specific detection voltage codes within the family. These ICs are designed for compact designs due to integrated delay timers and small package options like SSOP-3.

Supervisors Replacement Considerations

Publicly documented substitutes include BD5225G-1TR, which offers similar specifications but with adjustable delay and SSOP-5 packaging. Verify electrical compatibility, particularly detection voltage and output characteristics, before substitution.