BD4731G-TR

Overview

The BD4731G-TR is a standard voltage detector manufactured by ROHM Semiconductor, designed for power supply support applications. It features an open collector output type with a reset active state of low. The device monitors input voltage with a typical under-voltage detection threshold of 3.1V and offers high precision at ±1%. It operates within a reset active voltage range of 0.85 to 10V. The component is housed in an SSOP5 package (2.9x2.8 mm) and supports a wide operating temperature range from -40°C to 75°C.

Feature Summary

• Provides precise monitoring of power supply voltages with a fixed detection threshold.
• Features an open collector output suitable for interfacing with various logic families.
• Operates over a wide reset active voltage range to accommodate different system requirements.

Applications

• Power supply supervision in electronic equipment
• Microprocessor reset circuits
• Battery voltage monitoring systems

Procurement Notes

Verify the specific revision level and packaging configuration when sourcing this component. Confirm that the SSOP5 package dimensions match the target PCB footprint. Ensure compatibility with the required operating temperature range for the intended application environment. Check for any end-of-life notices or recommended replacement parts if long-term availability is a constraint.

Selection Notes

Select this component when a fixed 3.1V detection threshold is required without manual reset functionality. Consider the open collector output capability for flexible logic interfacing. Evaluate the ±1% precision against system tolerance requirements. Compare current consumption metrics if power efficiency is critical for battery-operated designs.

Part Context

This part belongs to the BD47 series of standard voltage detectors from ROHM. It serves as a fundamental supervisory circuit for ensuring stable operation of digital systems by detecting under-voltage conditions. The series is characterized by low power consumption and compact packaging options suitable for space-constrained designs.

Replacement Considerations

The BD5231G-1 is documented as a recommended replacement with the same package and similar specifications. Verify pinout compatibility and electrical parameter alignment before substitution.