BD45481G-TR

Overview

The BD45481G-TR is a voltage detector IC from the BD45 series by ROHM Semiconductor, designed for monitoring single-channel power supply voltages. It features a fixed threshold voltage of 4.8 V with a precision of ±1%. The device provides an open-drain output and includes a manual reset function with a fixed delay time of 100 ms. It operates within a supply voltage range of 0.95 V to 10 V and maintains low static current consumption of 0.80 μA at the detection voltage. The component supports a wide operating temperature range from -40°C to +105°C and is housed in an SSOP-5 package.

Feature Summary

• Provides precise under-voltage detection with a fixed 4.8 V threshold and ±1% accuracy
• Includes a manual reset input for controlled system recovery
• Features a fixed 100 ms reset delay timer to ensure stable power-up sequences
• Delivers low static current consumption suitable for battery-powered applications

Applications

• Microprocessor and microcontroller system supervision
• Portable electronic devices requiring low power monitoring
• Industrial control systems needing reliable voltage tracking
• Automotive electronics within specified temperature ranges

Procurement Notes

Verify the exact suffix and package variant when sourcing replacements, as the BD45481G-TR may be discontinued or subject to last-time-buy status. Confirm that substitute components match the 4.8 V threshold, SSOP-5 footprint, and manual reset capability. Check RoHS compliance and operating temperature specifications against original design requirements. Ensure availability through authorized distributors to avoid counterfeit risks.

Selection Notes

Select this component when a fixed 4.8 V detection threshold is required with high accuracy. The manual reset feature allows external control over the reset state, which is useful for specific startup sequences. Consider the 100 ms fixed delay for applications where immediate reset is not desired. The low static current makes it appropriate for energy-efficient designs. Verify that the open-drain output interface matches the downstream logic requirements.

Part Context

This part belongs to the BD45 series of voltage detectors, which are designed for general-purpose system supervision. The series offers various threshold voltages and delay options to accommodate different application needs. The BD45481G-TR specifically targets applications requiring a 4.8 V detection point with manual reset functionality. It is part of ROHM's portfolio of power management ICs focused on reliability and efficiency.

Replacement Considerations

BD5248G-1TR is a confirmed similar-level replacement with comparable package and supply status characteristics.