BD45441G-TR

Overview

The BD45441G-TR is a voltage detector from the ROHM BD45 series, designed for monitoring single-input power supplies. It features a fixed threshold voltage of 4.4 V with ±1% accuracy and an open-drain output type. The device includes a manual reset function and a fixed reset delay timer of 100 ms. It operates within a supply voltage range of 0.95 V to 10 V, consuming 800 nA in active mode and 850 nA in standby. The component supports surface-mount installation in a 5-pin SSOP package and functions across a temperature range of -40°C to +105°C.

Feature Summary

• Provides precise under-voltage detection with high accuracy for system supervision
• Includes manual reset capability for controlled system recovery
• Features low power consumption suitable for battery-operated applications
• Offers fixed delay time to prevent false resets during power transitions

Applications

• Processor supervisor circuits requiring stable voltage monitoring
• Portable electronic devices needing low standby current
• Industrial control systems operating in wide temperature environments
• Automotive electronics where reliable reset timing is critical

Procurement Notes

Verify the specific suffix G-TR against the official datasheet to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status as indicated in the manufacturer documentation. Check for end-of-life or last-time-buy notices if sourcing for long-term production. Ensure the open-drain output configuration matches the target circuit design requirements before procurement.

Selection Notes

Select this component when a fixed 4.4 V threshold is required for single-channel voltage monitoring. Consider the open-drain output compatibility with the downstream logic levels. Evaluate the 100 ms reset delay against the system's startup timing constraints. Verify that the SSOP-5 package fits the available PCB footprint and thermal management strategy.

Part Context

This part belongs to the BD45 series of supervisory circuits by ROHM Semiconductor. It is specifically engineered for applications requiring precise voltage detection without complex programmability. The series emphasizes reliability and low power consumption, making it suitable for embedded systems and consumer electronics where space and energy efficiency are prioritized.

Replacement Considerations

The BD5244G-1 is listed as a similar level replacement with comparable specifications. Verify pinout compatibility and electrical parameters before substitution. Ensure the alternative part meets the same package and environmental requirements.