BD5209G-1TR

Overview

The BD5209G-1TR is a CMOS voltage detector IC from ROHM Semiconductor, designed for monitoring single power supply lines. It features a fixed detection threshold of 0.9V with high precision accuracy of ±1% (±5mV). The device operates within a reset active voltage range of 0.8V to 6V and utilizes an open-drain output type. It incorporates an adjustable delay timer controlled by an external capacitor, ensuring reliable system resets during power-up or brown-out events. The IC consumes ultra-low current, typically 230nA in operation and 270nA in standby, making it suitable for battery-powered applications. It functions reliably across a temperature range of -40°C to +85°C.

Feature Summary

• Ultra-low power consumption suitable for energy-efficient designs
• High-precision voltage detection with minimal deviation
• Adjustable reset delay time via external capacitor
• Open-drain output configuration for flexible interfacing

Applications

• Portable electronic devices requiring extended battery life
• Microcontroller system supervision and reset generation
• Battery-operated equipment with strict power constraints
• Industrial control systems needing reliable voltage monitoring

Procurement Notes

Verify the specific suffix '1' indicates the 0.9V detection voltage variant. Confirm SSOP-5 package availability matches design requirements. Check RoHS compliance status for environmental regulations. Ensure ordering quantities align with manufacturer taping specifications. Validate supplier authenticity through authorized distribution channels.

Selection Notes

Select this component when a fixed 0.9V threshold is required rather than adjustable voltage options. Choose over BD5209G-2C if lower detection voltage is needed. Consider BD5210G-1TR for 1.0V threshold applications. Evaluate external capacitor selection for precise delay timing needs. Compare current consumption against other Nano Energy series members.

Part Context

Part of ROHM's Nano Energy series focusing on low-power voltage detectors. Designed as a successor to legacy BU42xx/BU43xx families. Offers improved precision and lower current compared to older standard detectors. Compatible with modern surface-mount assembly processes. Provides a cost-effective solution for basic supervisory circuit needs.

Replacement Considerations

BD5209G-1TR serves as a direct replacement for discontinued BU4209FVE and BU4809F parts. Verify pinout compatibility when substituting into existing layouts. Ensure electrical parameters meet original design specifications. Check package dimensions for mechanical fit in constrained spaces.