BU45K232G-TL

Overview

The BU45K232G-TL is a supervisory circuit voltage detector manufactured by ROHM Semiconductor. It features a fixed threshold voltage of 2.3 V and a reset delay time of 200 ms. The device operates within a supply voltage range of 600 mV to 6 V and consumes a quiescent current of 2.8 uA. It provides an open-drain output type with no manual reset or watchdog timer functionality. The component is housed in an SOT-23-3 package, supports surface mount installation, and functions across a temperature range of -40°C to +105°C.

Feature Summary

• Provides precise voltage monitoring with a fixed 2.3 V detection threshold for system supervision.
• Features a fixed 200 ms reset delay timer to ensure stable power-up sequencing.
• Utilizes an open-drain output configuration compatible with various logic families.
• Designed for low-power applications with minimal quiescent current consumption.

Applications

• Microprocessor reset circuits
• Battery-powered device supervision
• Portable electronic equipment power management

Procurement Notes

Verify the NRND status before procurement, as this component is not recommended for new designs. Confirm the SOT-23-3 package compatibility with your PCB footprint. Ensure the 2.3 V threshold aligns with your specific voltage monitoring requirements. Check RoHS compliance documentation if required for your manufacturing standards. Review the latest datasheet for any updates regarding operating conditions or electrical characteristics.

Selection Notes

Select this component when a fixed 2.3 V threshold and open-drain output are required. Consider the 200 ms delay for systems needing extended power-up stability. Evaluate the low quiescent current for battery-sensitive designs. Verify that the single-input architecture meets your supervision needs. Compare against newer alternatives if long-term availability is a critical constraint.

Part Context

This part belongs to the BU45/BU46 series of voltage detectors from ROHM Semiconductor. It is designed for general-purpose supervisory applications requiring simple, reliable voltage monitoring. The series offers various threshold voltages and output types to suit different system architectures. This specific model focuses on cost-effective, low-current supervision for portable electronics.

Replacement Considerations

BD5232G-1 is listed as a similar specification replacement, though it uses an SSOP-5 package instead of SOT-23-3. Verify pinout compatibility and package dimensions before substitution. The replacement may offer adjustable delay times compared to the fixed delay of the original part.