BU45K452G-TL

Supervisors Overview

The BU45K452G-TL is a fixed-delay voltage detector IC from ROHM Semiconductor, designed for monitoring single-input power supplies. It features an open-drain output and operates within a supply voltage range of 0.6 V to 6 V. The device detects under-voltage conditions at a typical threshold of 4.5 V with ±1% accuracy. It incorporates a built-in timer providing a fixed reset delay of 200 ms, eliminating the need for external capacitors. The component consumes 2.8 µA in the OFF state and functions reliably across an industrial temperature range of -40°C to +105°C.

Supervisors Feature Summary

• Built-in counter timer circuit eliminates the requirement for external delay-setting capacitors
• High detection accuracy of ±1% ensures precise voltage monitoring
• Low current consumption design supports battery-powered applications
• Open-drain output configuration allows flexible interfacing

Supervisors Applications

• Microprocessor system reset circuits
• Battery voltage monitoring
• Power supply supervision
• Portable electronic devices

Supervisors Procurement Notes

Verify the specific ordering suffix TL against official documentation to confirm package and tape specifications. Confirm that the NRND status aligns with long-term availability requirements for your project lifecycle. Ensure compatibility with existing PCB footprints and verify thermal performance within the specified operating temperature range before finalizing procurement decisions.

Supervisors Selection Notes

Select this component when a fixed 200 ms delay is required without external timing components. The 4.5 V threshold suits systems requiring supervision near standard logic levels. Consider the SSOP-3 package constraints and humidity sensitivity handling during storage and assembly. Evaluate the open-drain output drive capability against load requirements.

Supervisors Part Context

This part belongs to the BU45/BU46 series of highly accurate, low-current voltage detectors. These ICs are characterized by their integrated timer circuits and compact packaging options. The BU45K452G-TL specifically targets cost-sensitive applications needing reliable supervision with minimal external component count.

Supervisors Replacement Considerations

BD5245G-1 is listed as a recommended replacement with similar specifications, though it utilizes an SSOP-5 package instead of SSOP-3.