BD45451G-TR

Overview

The BD45451G-TR is a voltage detector from the ROHM BD45 series, designed for monitoring single-input supply voltages. It features a fixed threshold detection voltage of 4.5 V with a precision of ±1%. The device provides an open-drain output and includes a manual reset function without a watchdog timer. It operates within a maximum supply voltage of 10 V and supports a reset delay time of 100 ms. The component functions across a temperature range of -40°C to +105°C and is housed in an SSOP-5 package.

Feature Summary

• Provides precise under-voltage detection with a fixed threshold and high accuracy.
• Includes a manual reset capability for controlled system recovery.
• Features an open-drain output interface compatible with various logic levels.

Applications

• Processor supervisor circuits requiring stable voltage monitoring
• Battery-powered systems needing low quiescent current supervision
• Industrial control units operating in extended temperature environments

Procurement Notes

Verify the specific revision code and manufacturing date code upon order confirmation, as this component may be subject to end-of-life status or last-time-buy conditions. Ensure that the SSOP-5 footprint matches your PCB design constraints. Confirm RoHS compliance documentation is available for regulatory requirements. Cross-reference the exact part number suffix to guarantee compatibility with existing assembly processes and quality standards.

Selection Notes

Select this component when a fixed 4.5 V threshold is required for single-channel voltage supervision. Consider the open-drain output configuration for interfacing with microcontrollers. Evaluate the 100 ms reset delay against system startup timing requirements. Verify that the SSOP-5 package fits within the available board space and thermal management plan.

Part Context

This part belongs to the BD45 series of supervisory circuits from ROHM Semiconductor. It is specifically engineered for applications requiring reliable voltage monitoring with minimal external components. The series is known for its compact packaging and low power consumption characteristics suitable for portable and industrial electronics.

Replacement Considerations

The BD5245G-1 is listed as a recommended replacement with the same SSOP-5 package. Note differences in reset delay adjustability and circuit current specifications before substitution.