BD45301G-TR

Overview

The BD45301G-TR is a processor supervisor circuit manufactured by Rohm Semiconductor, designed for monitoring single voltage inputs. It features a typical under-voltage detection threshold of 3.0V with a precision accuracy of ±1%. The device provides an open-drain output that asserts a low active reset signal when the monitored voltage falls below the threshold. It includes a fixed reset delay timer of 100 milliseconds to ensure system stability during power transitions. The component operates within a supply voltage range of 0.95V to 10V and supports manual reset functionality. It is housed in a compact SSOP-5 package and is rated for operation across an extended temperature range from -40°C to +105°C.

Feature Summary

• Monitors a single voltage input to detect under-voltage conditions relative to a precise threshold.
• Generates an active-low reset signal via an open-drain output interface for reliable logic integration.
• Incorporates a fixed 100-millisecond reset delay timer to prevent premature system restarts.
• Supports manual reset capability to allow external control over the supervision state.

Applications

• Processor and microcontroller system supervision
• Embedded controller power management circuits
• Industrial equipment voltage monitoring

Procurement Notes

Verify the specific manufacturing date code and lot number upon receipt to ensure compliance with project requirements. Confirm that the received components match the BD45301G-TR designation exactly, as ordering suffixes may indicate variations in packaging or tape specifications. Ensure storage conditions adhere to moisture sensitivity level guidelines prior to soldering. Cross-reference the part against current manufacturer lifecycle status to confirm availability for long-term production needs.

Selection Notes

Select this component when a fixed 100ms delay and manual reset feature are required for a 3.0V threshold application. Compare against the BD5230G-1 if adjustable delay times or lower quiescent current are necessary, noting differences in operating voltage ranges. Ensure the open-drain output configuration aligns with the pull-up requirements of the target logic family. Verify that the SSOP-5 footprint matches the existing PCB layout constraints.

Part Context

This part belongs to the BD45 series of supervisory circuits from Rohm Semiconductor. The series typically offers various threshold voltages and delay options within the same SSOP-5 package form factor. The BD45301G-TR specifically targets applications requiring a standard 3.0V detection point with a fixed timing response, distinguishing it from variants with different thresholds or programmable delays.

Replacement Considerations

BD5230G-1TR is a recommended replacement with the same SSOP-5 package. Note that the substitute offers adjustable delay times and slightly different operating voltage ranges compared to the fixed parameters of the original part.