BU45K264G-TL

Supervisors Overview

The BU45K264G-TL is a fixed-delay voltage detector IC from ROHM Semiconductor, designed for monitoring single power supply rails. It features a threshold voltage of 2.6 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 400 ms. Packaged in a compact SOT-23-3 format, it supports surface-mount installation and functions reliably across temperatures from -40°C to +105°C.

Supervisors Feature Summary

• Integrated fixed delay timer circuit eliminates the need for external capacitors for timing settings
• High detection accuracy maintained at ±1% tolerance for precise voltage supervision
• Ultra-low current consumption design suitable for battery-powered applications
• Built-in hysteresis function prevents output oscillation during voltage transitions

Supervisors Applications

• Microprocessor system reset circuits
• Battery voltage monitoring in portable devices
• Power supply supervision for embedded systems
• Watchdog timer trigger inputs

Supervisors Procurement Notes

Verify component authenticity through authorized channels as this part is marked Not Recommended for New Designs (NRND). Confirm package orientation and pinout compatibility with existing PCB footprints. Check RoHS compliance documentation for specific regional requirements. Ensure storage conditions account for moisture sensitivity levels prior to soldering.

Supervisors Selection Notes

Select this component when a fixed 400 ms delay is acceptable without external components. Compare against adjustable delay alternatives if timing flexibility is required. Consider the SOT-23-3 package constraints for thermal management. Evaluate current consumption benefits against higher precision or automotive-grade requirements if applicable.

Supervisors Part Context

This voltage detector belongs to the BU45/BU46 series of supervisory circuits. It serves as a successor to older discrete solutions by integrating detection and timing into a single small footprint. The series emphasizes low power operation and high accuracy for consumer and industrial electronics requiring reliable power management.

Supervisors Replacement Considerations

The BD5226G-1TR is listed as a similar specification replacement. Note that the substitute uses an SSOP5 package instead of SOT-23-3, requiring layout adjustments. The replacement offers adjustable delay times rather than fixed delays.