BU45L334G-TL

Supervisors Overview

The BU45L334G-TL is a voltage detector IC from ROHM Semiconductor, designed for monitoring single-input power supplies. It features a fixed threshold voltage of 3.3 V with an accuracy of ±1%. The device utilizes an open-drain output and includes a built-in reset delay timer of 400 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 operating temperature range from -40°C to +105°C.

Supervisors Feature Summary

• Built-in counter timer delay circuit removes the requirement for external delay-setting capacitors.
• High detection accuracy of ±1% ensures reliable voltage threshold monitoring.
• Low current consumption design minimizes power usage during operation.
• Compact SSOP-3 package facilitates space-efficient surface-mount integration.

Supervisors Applications

• Monitoring battery-powered devices requiring stable voltage supervision.
• Supervising microprocessor and memory power rails in embedded systems.
• Ensuring system stability in portable electronic equipment.

Supervisors Procurement Notes

Verify the NRND (Not Recommended for New Designs) status before procurement, as this indicates the component is not intended for new designs. Confirm that existing inventory meets project requirements. Check for moisture sensitivity levels and ensure proper handling procedures are followed during storage and assembly to maintain component integrity.

Supervisors Selection Notes

Select this component when a fixed 3.3 V threshold with a 400 ms delay is required. The open-drain output necessitates an external pull-up resistor. Consider the low quiescent current for battery applications. Ensure the input voltage range covers the operational supply variations. Verify compatibility with the target PCB footprint and thermal constraints.

Supervisors Part Context

This part belongs to the BU45/BU46 series of highly accurate, low-current voltage detectors. These ICs are characterized by their internal delay circuits and compact packaging. The series is widely used in consumer electronics and industrial control systems where precise power management and small form factors are critical.

Supervisors Replacement Considerations

The BD5233G-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 BD5233G-1 offers adjustable delay timing and lower current consumption compared to the fixed-delay BU45L334G-TL.