BD45322G-TR

Overview

The BD45322G-TR is a voltage detector IC from the BD45 series manufactured by ROHM Semiconductor. It features a fixed reset delay time of 200 ms and an under-voltage detection threshold of 3.2 V with ±1% precision. The device operates within a supply voltage range of 0.95 V to 10 V and provides an open-drain output active at a low state. It supports manual reset functionality and lacks a watchdog timer or battery backup switch. The component is housed in an SSOP-5 package, suitable for surface mount installation, and operates across a temperature range of -40°C to +105°C.

Feature Summary

• Fixed 200 ms reset delay timer ensures consistent timing behavior without external components.
• High precision voltage detection with ±1% accuracy for reliable system monitoring.
• Manual reset capability allows for controlled system initialization via external input.

Applications

• Microprocessor reset circuits requiring fixed delay timing
• Battery-powered devices needing precise under-voltage detection
• Industrial control systems operating in extended temperature ranges

Procurement Notes

Verify current lifecycle status as the BD45322G is listed as discontinued or not recommended for new designs. Confirm availability of last-time buy options or qualified replacements such as the BD5232G-1. Ensure compatibility with existing PCB layouts when transitioning to alternative packages or pinouts. Check RoHS compliance documentation for regulatory adherence in target markets.

Selection Notes

Select this component when a fixed delay time is sufficient for the application requirements. Consider the BD5232G-1 if adjustable delay times are needed instead. Evaluate the open-drain output interface compatibility with downstream logic levels. Verify that the 3.2 V detection threshold aligns with the specific power rail monitoring needs of the design.

Part Context

The BD45322G-TR belongs to the BD45 series of CMOS reset ICs designed for high-precision voltage monitoring. This series integrates a CMOS process technology to achieve low power consumption while maintaining accurate detection thresholds. The TR suffix indicates tape-and-reel packaging for automated assembly processes.

Replacement Considerations

The BD5232G-1 is identified as a similar level replacement with the same SSOP-5 package. Note that the BD5232G-1 offers adjustable delay times rather than fixed delays, which may require circuit modifications.