BD45315G-TR

Overview

The BD45315G-TR is a voltage detector from the BD45 series by ROHM Semiconductor, housed in a 5-pin SSOP package. It features a fixed under-voltage detection threshold of 3.1V with ±1% precision. The device provides an open-drain output that activates low when the monitored voltage drops below the threshold. Key electrical parameters include a reset delay time of 50 ms, a maximum operating supply voltage of 10 V, and a typical static current of 750 nA. It operates within a temperature range of -40°C to +105°C.

Feature Summary

• Fixed 3.1V detection threshold with high accuracy
• Open-drain active-low output configuration
• Low power consumption suitable for battery applications

Applications

• Processor supervisor circuits
• Battery-powered system monitoring
• Portable electronic devices requiring voltage supervision

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status as indicated in official documentation. Check for obsolescence notices, as some sources indicate this specific part may be discontinued or restricted. Ensure the ordering suffix matches the required tape-and-reel quantity specifications.

Selection Notes

Select this component when a fixed 3.1V threshold is required for system supervision. Consider the open-drain output compatibility with the target logic levels. Evaluate the 50ms reset delay against the microcontroller startup requirements. Compare static current consumption against other options if ultra-low power standby is critical.

Part Context

This part belongs to the BD45 series of voltage detectors designed for general-purpose power management. It serves as a supervisory circuit to ensure stable operation by resetting systems during under-voltage conditions. The SSOP-5 package allows for compact PCB layouts in consumer electronics and industrial control applications.

Replacement Considerations

The BD5231G-1 is listed as a similar level replacement with the same package and 3.1V threshold. Note that the BD5231G-1 offers adjustable delay times instead of fixed delay, which may require circuit redesign.