BU45L454G-TL

Overview

The BU45L454G-TL is a fixed-delay voltage detector IC from ROHM Semiconductor, designed for monitoring power supply voltages. 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 with a typical threshold of 4.5 V and maintains a precision of ±1%. A built-in counter timer provides a fixed reset delay of 400 ms, eliminating the need for external timing capacitors. It consumes low current (2.3 μA active) and supports operation from -40°C to +105°C in an SSOP-3 package.

Feature Summary

• Built-in fixed delay timer eliminates the need for external capacitors
• High detection accuracy with ±1% threshold precision
• Low current consumption suitable for battery-powered applications
• Open-drain output configuration for flexible logic interfacing

Applications

• Microprocessor system reset circuits
• Battery voltage monitoring
• Portable electronic devices
• Industrial control systems

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm lot traceability and RoHS compliance status prior to procurement. Note that this specific part number may have limited availability or obsolescence status; check current supply status on official ROHM documentation before finalizing orders.

Selection Notes

Select this component when a fixed 400 ms delay is required without external components. Ensure the 4.5 V threshold aligns with the target system's minimum operating voltage. Verify that the open-drain output capability matches the downstream logic requirements. Consider thermal performance within the specified -40°C to +105°C range for the intended environment.

Part Context

This device belongs to the BU45/BU46 series of voltage detectors, characterized by high accuracy and low power consumption. It is part of ROHM's portfolio of supervisory circuits designed for reliable system monitoring in compact packages.

Replacement Considerations

Check ROHM official documentation for recommended replacements if obsolete. Similar specifications may be found in the BD52xx series, but verify pinout compatibility and electrical parameters carefully.