BD4839G-TR

Overview

The BD4839G-TR is a standard CMOS voltage detector IC from ROHM Semiconductor, designed for monitoring supply voltages in electronic circuits. It features an N-channel open-drain output and operates within a detection voltage range of 0.9V to 10V. The device provides a fixed threshold of 3.9V with ±1% accuracy. It supports surface-mount installation in a compact SSOP-5 package. The component functions without manual reset or watchdog timer capabilities, making it suitable for basic supervision tasks.

Feature Summary

• Ultra-low current consumption for extended battery life
• High-accuracy voltage detection with tight tolerance
• Wide operating temperature range for diverse environments
• Compact SSOP-5 package for space-constrained designs

Applications

• Portable electronic devices requiring low power monitoring
• Battery-powered systems needing voltage supervision
• General-purpose circuit protection against under-voltage conditions
• Embedded systems utilizing standard CMOS logic interfaces

Procurement Notes

Verify the obsolete status before procurement as the part is not recommended for new designs. Confirm availability through authorized distributors only. Check RoHS compliance documentation for regulatory adherence. Ensure the SSOP-5 package matches your PCB footprint requirements. Validate the 3.9V threshold aligns with your system's voltage specifications.

Selection Notes

Select this component when a fixed 3.9V threshold is required for voltage supervision. Consider the open-drain output compatibility with your microcontroller inputs. Evaluate the low current consumption benefits for battery-operated applications. Verify that the absence of a reset delay timer meets your system's timing requirements. Compare with newer alternatives if long-term supply stability is critical.

Part Context

This component belongs to the BU48xx series of standard voltage detectors. It shares characteristics with other members like the BU4839FVE-TR but differs in package type. The series emphasizes low power and high accuracy for portable electronics. It serves as a foundational supervision element in various consumer and industrial applications.

Replacement Considerations

The BD5239G-1 is listed as a replacement with the same package and similar electrical characteristics. Verify pinout compatibility and output drive strength differences. Check if the adjustable delay timer in the replacement suits your application needs.