BU45L472G-TL

Overview

The BU45L472G-TL is a voltage detector IC from the ROHM BU45/BU46 series, designed for monitoring single-input power supplies. It features a fixed threshold voltage of 4.7 V with an accuracy of ±1%. The device provides an open-drain output and includes a built-in reset delay timer of 200 ms, eliminating the need for external capacitors. It operates within a supply voltage range of 0.6 V to 6 V and consumes a typical operating current of 2.8 µA. The component is housed in an SSOP-3 package and supports an extended industrial temperature range from -40°C to +105°C.

Feature Summary

• Integrated counter timer delay circuit removes the requirement for external delay-setting capacitors.
• High detection accuracy maintained at ±1% across the specified operating conditions.
• Low current consumption design suitable for battery-powered or energy-efficient applications.

Applications

• Microprocessor system reset circuits
• Battery voltage monitoring
• Power supply supervision

Procurement Notes

Verify the lifecycle status before procurement, as this component is marked Not Recommended for New Designs (NRND). Confirm availability through authorized distributors, noting that supply may be limited to existing customer support. Ensure the SSOP-3 package and 4.7 V threshold match the specific design requirements. Check RoHS compliance details if required by regulatory standards.

Selection Notes

Select this part when a fixed 4.7 V threshold with high precision is required for single-channel voltage monitoring. The open-drain output allows for flexible interfacing with various logic levels. Consider the 200 ms internal delay for appropriate reset timing without external components. Evaluate the NRND status for long-term production viability and potential need for future redesigns.

Part Context

This component belongs to the BU45/BU46 series of highly accurate, low-current voltage detectors. These ICs are characterized by their integrated delay timers and compact SSOP-3 packaging. The series is engineered for reliable supervision of digital systems, offering consistent performance across wide temperature ranges and varying supply voltages.

Replacement Considerations

The BD5247G-1 is listed as a similar specification replacement. Note that the substitute uses an SSOP-5 package instead of SSOP-3, requiring layout adjustments. The replacement offers adjustable delay time rather than fixed, and has different current consumption characteristics.