BU45K442G-TL

Supervisors Overview

The BU45K442G-TL is a fixed-delay voltage detector IC manufactured by ROHM Semiconductor. It features an under-voltage detection threshold of 4.4V with a precision of ±1%. The device provides a fixed reset delay timer of 200ms and operates within a reset active voltage range of 0.6V to 6V. It utilizes an open-drain output type with a low reset active state. The circuit current consumption is 2.3μA in the ON state and 2.8μA in the OFF state. Hysteresis is set at VDET x 0.05. It supports L output currents of 2mA (LowVol) and 8.5mA (HighVol). The component is housed in an SSOP3 package and functions within a temperature range of -40°C to 105°C.

Supervisors Feature Summary

• Fixed delay timer ensures stable reset timing without external components
• Open-drain output allows flexible interfacing with various logic levels
• Compact SSOP3 package design with rotated pin configuration for space efficiency

Supervisors Applications

• Microprocessor system supervision
• Battery-powered device monitoring
• General electronic equipment power management

Supervisors Procurement Notes

Verify the obsolete status before procurement as this part is not recommended for new designs. Confirm compatibility with existing layouts due to the specific SSOP3 pin rotation. Check for authorized distributors offering remaining stock or valid substitutes like the BD5244G-1 series. Ensure RoHS compliance matches project requirements.

Supervisors Selection Notes

Select this component only for legacy system maintenance or replacement where the 4.4V threshold and 200ms delay are strictly required. Consider the higher current consumption compared to newer alternatives. Evaluate the limited availability and NRND status against long-term supply chain risks. Verify that the open-drain output suits the downstream circuit interface needs.

Supervisors Part Context

This voltage detector belongs to the BU45/BU46 series of supervisory circuits from ROHM. It is designed for monitoring single-input voltage levels in portable and industrial applications. The series emphasizes compact packaging and reliable operation across wide temperature ranges, targeting cost-sensitive consumer electronics markets.

Supervisors Replacement Considerations

The BD5244G-1 is listed as a similar specification replacement with adjustable delay and SSOP5 packaging.