BD45331G-TR

Overview

The BD45331G-TR is a single-channel voltage detector manufactured by Rohm Semiconductor, designed for monitoring power supply integrity in electronic systems. It features a fixed detection threshold of 3.3V with a precision of ±1%. The device provides an open-drain output that asserts a low-active reset signal when the monitored voltage drops below the threshold. A fixed reset delay timer of 100ms ensures stable operation during transient conditions. It operates within a supply voltage range of 0.95V to 10V and supports manual reset functionality. The component is housed in a compact 5-SSOP package and is rated for an operating temperature range of -40°C to +105°C.

Feature Summary

• Fixed 3.3V detection threshold with high accuracy
• Open-drain output for flexible logic interfacing
• Integrated 100ms fixed reset delay timer
• Supports manual reset input for system control

Applications

• Microprocessor and microcontroller power supply supervision
• Battery-operated devices requiring voltage monitoring
• Industrial control systems with strict reset timing requirements
• Embedded systems needing reliable brown-out protection

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to discontinued status. Confirm RoHS compliance and check for specific lot traceability requirements. Ensure storage conditions meet moisture sensitivity level standards. Validate pinout compatibility with existing PCB layouts before integration. Request official datasheets and quality certificates to ensure adherence to specifications.

Selection Notes

Select this component when a fixed 3.3V threshold is required without programmable options. Consider the open-drain output capability for interfacing with various logic families. Evaluate the 100ms delay against system startup requirements. Verify that the 5-SSOP package fits the available board space. Check if manual reset functionality aligns with system design needs.

Part Context

The BD45331G-TR belongs to the BD45xxx series of voltage detectors from Rohm Semiconductor. This series focuses on providing reliable power supervision solutions with fixed thresholds and minimal external component requirements. The part is designed for surface-mount applications, offering a balance between performance and size efficiency for modern electronic designs.

Replacement Considerations

The BD5233G-1TR is listed as a similar level replacement with the same SSOP5 package. Verify electrical parameter compatibility, particularly the detection voltage and output characteristics, before substitution. Confirm package pinout alignment to ensure direct interchangeability without PCB redesign.