BU45K484G-TL

Supervisors Overview

The BU45K484G-TL is a voltage detector IC from ROHM Semiconductor, designed for monitoring single-input power supply lines. It features a fixed threshold voltage of 4.8 V with an overvoltage detection limit of 4.848 V and a reset delay time of 400 ms. The device operates within a supply voltage range up to 6 V and maintains high accuracy of 1%. It utilizes an open-drain output configuration without manual reset or watchdog timer capabilities. The component supports surface-mount installation in an SSOP-3 package and functions reliably across an extended temperature range from -40°C to +105°C.

Supervisors Feature Summary

• Provides precise voltage supervision with a fixed 4.8 V threshold and 1% accuracy for reliable system monitoring.
• Features an open-drain output interface compatible with various logic families without requiring external pull-up resistors for basic operation.
• Incorporates a fixed 400 ms reset delay timer to ensure stable power-on sequencing and prevent premature system activation.

Supervisors Applications

• Monitoring battery-powered devices to indicate low-voltage conditions
• Supervising microprocessor reset lines in embedded systems
• Ensuring stable power delivery in portable electronic equipment

Supervisors Procurement Notes

Verify the current lifecycle status before integration, as this component may be marked as obsolete or not recommended for new designs. Confirm availability through authorized distributors, noting that stock levels can be limited. Ensure the SSOP-3 package dimensions match your PCB footprint requirements. Check RoHS compliance documentation if environmental regulations apply to your manufacturing process. Validate that the 4.8 V threshold aligns precisely with your system's voltage monitoring needs.

Supervisors Selection Notes

Select this component when a fixed 4.8 V detection threshold is required for single-channel voltage monitoring. The open-drain output simplifies circuit design by allowing flexible interfacing with different logic levels. Consider the 400 ms reset delay for applications needing extended power-on stabilization periods. The wide operating temperature range makes it suitable for industrial or automotive environments where thermal stability is critical. Verify that the maximum supply voltage of 6 V covers your system's peak operating conditions.

Supervisors Part Context

This part belongs to the BU45/BU46 series of voltage detectors from ROHM Semiconductor, which offers various threshold voltages for diverse monitoring applications. The series is characterized by low power consumption and compact packaging options like SSOP-3. These components are commonly used in consumer electronics and industrial control systems where reliable power supervision is essential. The specific model BU45K484G-TL provides a higher threshold compared to other variants in the family, targeting applications requiring stricter voltage regulation.

Supervisors Replacement Considerations

BD5230G-1 is listed as a similar specification replacement option. Verify compatibility regarding threshold voltage, output type, and package dimensions before substitution. Ensure the alternative component meets the same operating temperature and supply voltage requirements.