BD45422G-TR

Overview

The BD45422G-TR is a processor supervisor voltage detector from the BD45xxx series, manufactured by Rohm Semiconductor. It features a fixed detection threshold of 4.2V with an accuracy of ±1%. The device provides one monitored input and utilizes an open-drain output type that is active low. A manual reset function is supported, while watchdog timers and battery backup switches are absent. The reset delay time is specified as a minimum of 180ms. It operates within a temperature range of -40°C to +105°C TA and is housed in a 5-SSOP package.

Feature Summary

• Provides precise under-voltage detection with a fixed 4.2V threshold and ±1% accuracy for reliable system monitoring.
• Features an open-drain active-low output compatible with various logic levels, supporting manual reset functionality.

Applications

• Processor supervision in embedded systems requiring stable power sequencing.
• Voltage monitoring for microcontrollers and digital logic circuits.
• General-purpose supervisory circuits in consumer electronics.

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to availability constraints. Confirm RoHS3 compliance and REACH status prior to integration. Check current lifecycle status as the part may be discontinued or subject to last-time-buy conditions. Ensure packaging specifications match production requirements, noting potential variations in reel quantities.

Selection Notes

Select this component when a fixed 4.2V threshold with high precision is required for single-channel voltage monitoring. Consider the open-drain output and manual reset capability for flexible interface design. Evaluate thermal performance within the -40°C to +105°C operating range. Compare against alternatives like the BD5242G-1TR if adjustable delay or different supply voltage ranges are needed.

Part Context

Part of the BD45xxx series of voltage detectors, designed for compact surface-mount applications. The 5-SSOP package offers space efficiency for portable devices. This specific variant targets applications needing a standard 4.2V detection point with minimal external components, fitting into broader power management strategies for digital systems.

Replacement Considerations

BD5242G-1TR is listed as a parameter-equivalent alternative with similar package dimensions but offers adjustable delay times instead of fixed delay.