BD45285G-TR

Overview

The BD45285G-TR is a CMOS voltage detector IC manufactured by ROHM Semiconductor, designed for supervisory circuit applications. It features a fixed reset detection threshold voltage of 2.8 V with an accuracy of ±1%. The device operates within a supply voltage range up to 10 V and provides an open-drain output type. It includes a manual reset function and a fixed reset delay time of 50 ms. The component does not incorporate a watchdog timer or battery backup switch. It supports a wide operating temperature range from -40°C to +105°C and consumes a typical static current of 750 nA. The part is housed in an SSOP-5 surface-mount package.

Feature Summary

• Utilizes CMOS process technology for low current consumption and high detection accuracy.
• Integrates a built-in counter timer delay circuit to eliminate the need for external capacitors.
• Provides manual reset functionality via dedicated input pin.
• Features open-drain output suitable for interfacing with various logic families.

Applications

• Microprocessor system reset circuits
• Battery-powered device power management
• Embedded system voltage supervision
• Industrial control unit monitoring

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to end-of-life status. Confirm RoHS compliance documentation matches specific production batches. Check for obsolescence notices and last-time-buy deadlines. Ensure storage conditions adhere to moisture sensitivity levels specified in the datasheet. Validate pinout compatibility during integration planning.

Selection Notes

Select this model when a precise 2.8 V detection threshold is required for system reset. Consider the 50 ms fixed delay for stable power-up sequences without external timing components. Evaluate the open-drain output capability against load requirements. Compare static current consumption against other series variants if power efficiency is critical. Verify package footprint compatibility with existing PCB layouts.

Part Context

This component belongs to the BD45 series of voltage detectors from ROHM Semiconductor. The series utilizes standard CMOS processes to achieve low power consumption and high precision. It offers a wide range of detection voltages in 0.1 V steps. The BD45285G-TR specifically targets applications requiring reliable supervision at the 2.8 V level. It is part of a broader lineup including similar models with different thresholds and output types.

Replacement Considerations

BD45281G-TR: Similar threshold (2.8V) but 100ms delay. BD45285G: Non-tray version of same part. BD46xxxG series: Alternative family with adjustable delay options.