BD45472G-TR

Overview

The BD45472G-TR is a single-channel voltage detector manufactured by Rohm Semiconductor, designed for supervisory circuit applications. It features a fixed detection threshold of 4.7V with a reset delay time of 180ms minimum. The device operates within a supply voltage range of 0.95V to 10V and provides an open-drain or open-collector output that asserts low during reset conditions. It supports manual reset functionality and functions reliably across an industrial temperature range from -40°C to +105°C. Packaged in a compact 5-SSOP (SC-74A) surface-mount housing, it is suitable for space-constrained designs requiring precise voltage monitoring.

Feature Summary

• Provides reliable system supervision through a fixed 4.7V detection threshold with high accuracy.
• Features a manual reset input allowing external control over the reset state generation.
• Delivers an open-drain output compatible with various logic families for flexible interfacing.
• Operates effectively across a wide industrial temperature range for robust environmental performance.

Applications

• Microprocessor and microcontroller power supply monitoring
• Battery-powered equipment voltage supervision
• White goods and home appliance control circuits
• Industrial control system power management

Procurement Notes

Verify component authenticity and datasheet alignment due to obsolete status. Confirm package integrity and pinout compatibility with existing PCB layouts. Check for RoHS compliance documentation. Ensure replacement strategies are evaluated as this part may no longer be actively produced. Validate electrical parameters against current design requirements before finalizing procurement decisions.

Selection Notes

Select this component when a fixed 4.7V threshold and manual reset capability are required. Consider the open-drain output for level shifting needs. Evaluate the 5-SSOP package for space constraints. Compare against adjustable delay alternatives if timing flexibility is needed. Verify operating voltage range matches the target application's supply characteristics.

Part Context

This component belongs to the BD45xxx series of voltage detectors from Rohm Semiconductor. It shares functional similarities with other parts in the family but is distinguished by its specific 4.7V threshold and manual reset feature. The series is known for low power consumption and compact packaging options suitable for portable and industrial electronics.

Replacement Considerations

BD5247G-1 is a recommended replacement with similar specifications and SSOP5 package. Note differences in delay timer adjustability and current consumption. Verify pinout compatibility and electrical parameter alignment before substitution.