BU45K242G-TL

Supervisors Overview

The BU45K242G-TL is a fixed-delay time voltage detector IC manufactured by ROHM Semiconductor. It features an under-voltage detection threshold of 2.4V with a precision of ±1%. The reset active voltage range spans from 0.6V to 6V, utilizing an open-drain output type. The device incorporates a fixed reset delay timer of 200ms and operates in the low active state. Circuit current consumption is 2.3μA when on and 2.8μA when off. Hysteresis voltage is defined as Vdet multiplied by 0.05. The component is housed in an SSOP-3 package and supports RoHS compliance.

Supervisors Feature Summary

• Integrated fixed delay timer eliminates the need for external capacitors for timing settings.
• Open-drain output configuration provides flexible interface compatibility.
• Low power consumption design suitable for battery-operated applications.
• Built-in hysteresis function enhances noise immunity during voltage transitions.

Supervisors Applications

• Monitoring power supply voltages in portable electronic devices
• Resetting microcontrollers and logic circuits during brown-out events
• Supervisory circuits in industrial control systems
• Voltage monitoring in automotive electronics

Supervisors Procurement Notes

Verify the specific ordering suffix TL against official ROHM documentation to confirm tape-and-reel packaging specifications. Confirm that the part status remains Not Recommended for New Designs (NRND) if sourcing for new projects. Ensure compatibility with existing PCB footprints for the SSOP-3 package. Check for any regional distribution restrictions or availability limitations before finalizing procurement plans.

Supervisors Selection Notes

Select this component when a precise 2.4V detection threshold is required with a fixed 200ms response delay. Consider the open-drain output for level-shifting requirements. Evaluate the low standby current for energy-sensitive designs. Compare against similar series parts like the BD5224G-1 for potential performance upgrades or alternative packaging options if NRND status poses a risk.

Supervisors Part Context

This voltage detector belongs to the BU45/BU46 series of supervisory circuits designed for high accuracy and low current consumption. The series integrates counter timer delay circuits internally, simplifying board space requirements. These ICs are commonly used in PMIC applications where reliable power management and system reset functions are critical for operational stability.

Supervisors Replacement Considerations

The BD5224G-1 is listed as a similar specification replacement option. Verify pinout compatibility and electrical parameter alignment before substitution. Note that the BD5224G-1 offers adjustable delay times, which may require circuit modifications if fixed timing is strictly required.