BD45455G-TR

Overview

The BD45455G-TR is a CMOS voltage detector IC from the BD45 series by ROHM Semiconductor. It features a fixed detection threshold of 4.5 V with ±1% precision and a fixed reset delay time of 50 ms. The device operates within a supply voltage range of 0.95 V to 10 V and draws a typical circuit current of 800 nA at the 4.8 V detection level. It provides an open-drain active-low output and supports manual reset functionality. Packaged in a compact SSOP-5 format, it functions as a processor supervisor without requiring external timing capacitors.

Feature Summary

• Integrates a counter timer delay circuit internally, eliminating the need for external capacitors for delay setting.
• Provides high-accuracy voltage monitoring with a fixed detection threshold and low power consumption characteristics.
• Features an open-drain output compatible with various logic families and supports manual reset operations.

Applications

• Processor supervision in embedded systems
• Battery-powered devices requiring low quiescent current
• General-purpose voltage monitoring circuits

Procurement Notes

Verify component authenticity through authorized channels due to potential availability constraints. Confirm RoHS compliance status and check for end-of-life or last-time-buy notices before finalizing procurement plans. Ensure storage conditions align with manufacturer specifications to maintain device integrity during handling and assembly processes.

Selection Notes

Select this component when a fixed 4.5 V threshold with precise accuracy is required. Consider the 50 ms fixed delay for system startup stability. Evaluate the low static current against battery life requirements. Ensure the open-drain output configuration matches the downstream logic interface needs.

Part Context

This part belongs to the BD45xxx series of highly accurate, low-current voltage detectors. The series is characterized by built-in counter timer delay circuits that simplify design by removing external timing components. These ICs are designed for applications requiring reliable power management and system reset control in compact form factors.

Replacement Considerations

BD5245G-1 is listed as a recommended replacement with the same SSOP-5 package and 4.5 V detection voltage. Note differences in reset delay adjustability and operating voltage ranges when substituting.