BD4945FVE-TR

Overview

The BD4945FVE-TR is a single-channel voltage detector IC manufactured by Rohm Semiconductor, designed for surface-mount installation in VSOF-5 packages. It features a typical under-voltage detection threshold of 4.5V with ±1% precision and an active low reset output. The device operates within a supply voltage range of 0.95V to 10V and supports an operating temperature range from -40°C to 105°C. Key electrical characteristics include a circuit current of 0.60μA at VS=4.8V and hysteresis defined as Vdet x 0.05.

Feature Summary

• Provides precise monitoring of power supply voltages using CMOS technology
• Generates a reset signal when input voltage drops below the specified threshold
• Incorporates internal hysteresis to prevent output oscillation during voltage transitions

Applications

• Microprocessor system supervision
• Portable equipment power management
• Battery-operated device voltage monitoring

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to end-of-life status. Confirm package integrity and pin alignment against the official datasheet specifications before integration into production lines. Ensure storage conditions comply with moisture sensitivity level requirements to maintain device reliability.

Selection Notes

Select this component when a fixed 4.5V threshold with high accuracy is required for single-supply monitoring. Consider the VSOF-5 package constraints for PCB layout and thermal management. Evaluate the low standby current consumption benefits for battery-powered applications requiring extended operational life without frequent maintenance.

Part Context

This part belongs to the BD49 series of standard voltage detectors, which are engineered for compact electronic designs. The series utilizes CMOS processes to achieve low power consumption while maintaining reliable performance across industrial temperature ranges. It serves as a fundamental building block for power management systems in consumer and industrial electronics.

Replacement Considerations

The BD5245G-1 is listed as a similar specification replacement option. Verify pinout compatibility and electrical parameter alignment before substitution.