BU45K332G-TL

Overview

The BU45K332G-TL is a fixed-delay voltage detector IC manufactured by ROHM Semiconductor. It features a detection voltage of 3.3V with a precision of ±1%. The device provides a fixed reset delay timer of 200ms and utilizes an open-drain output type. It operates within a supply voltage range of 0.6V to 6V and maintains low power consumption, drawing 2.3μA in the ON state and 2.8μA in the OFF state. The component supports an operating temperature range from -40°C to +105°C and is housed in an SSOP-3 package.

Feature Summary

• Provides fixed 200ms reset delay for stable power-up sequencing
• Features high-precision 3.3V detection threshold with ±1% accuracy
• Utilizes open-drain N-ch output for flexible logic interfacing
• Operates with ultra-low current consumption suitable for battery backup

Applications

• Microprocessor system reset circuits
• Battery-powered equipment monitoring
• Portable electronic devices requiring low standby current
• General-purpose voltage supervision in embedded systems

Procurement Notes

Verify the Not Recommended for New Designs (NRND) status before integration into new products. Confirm that the SSOP-3 package pinout matches existing board layouts. Ensure compatibility with the 0.6V to 6V input range and open-drain output requirements. Check for RoHS compliance documentation if required by specific regulatory standards.

Selection Notes

Select this component when a fixed 200ms delay is sufficient for system stability. The 3.3V threshold suits standard logic families. Consider the open-drain output requirement for pull-up resistor implementation. Evaluate the ±1% precision against system tolerance needs. Verify that the wide operating voltage range covers the entire discharge cycle of the monitored source.

Part Context

This part belongs to the BU45/BU46 series of voltage detectors. It shares functional similarities with other models in the family but differs in detection voltage and package configuration. The BU45K series specifically denotes N-channel open-drain outputs with fixed delays. It is distinct from the BU46L series which offers CMOS outputs.

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 adaptation. The replacement offers adjustable delay rather than fixed 200ms delay.