BU4843G-TR

Supervisors Overview

The BU4843G-TR is a standard CMOS voltage detector IC manufactured by ROHM Semiconductor. It features a fixed threshold voltage of 4.3 V with a detection precision of ±1%. The device operates within a supply voltage range of 0.7 V to 7 V and provides an open-drain output type. It supports a reset active voltage range from 0.7 V to 7 V. The component is designed for surface mount installation in an SSOP-5 package, measuring 2.9x2.8 mm with a thickness of 1.25 mm. It functions reliably across a temperature range of -40°C to +125°C.

Supervisors Feature Summary

• CMOS technology ensures low power consumption suitable for battery-operated applications.
• Fixed threshold voltage detection eliminates the need for external resistor networks.
• Open-drain output configuration allows flexible interfacing with various logic families.

Supervisors Applications

• Monitoring power supply voltages in portable electronic devices
• Providing reset signals for microcontrollers and digital circuits
• Supervising battery-powered systems requiring stable voltage thresholds

Supervisors Procurement Notes

Verify the specific ordering part number BU4843G-TR against official ROHM documentation to ensure compatibility with existing designs. Confirm that the SSOP-5 package dimensions align with PCB footprint requirements. Check current lifecycle status as this component may be designated as Not Recommended for New Designs (NRND). Ensure environmental compliance data matches project specifications before finalizing procurement decisions.

Supervisors Selection Notes

Select this component when a precise 4.3 V threshold is required for voltage supervision. Consider the open-drain output capability if level shifting or wired-OR configurations are necessary. Evaluate the wide operating temperature range for harsh environment applications. Compare static current specifications against other voltage detectors if power efficiency is critical. Verify package availability and lead times given potential end-of-life status.

Supervisors Part Context

The BU4843G-TR belongs to ROHM's standard voltage detector series, designed for general-purpose power monitoring. It serves as a dedicated supervisory circuit for maintaining system stability during power fluctuations. The device integrates essential detection functions without requiring external timing components. Its compact SSOP-5 package facilitates space-constrained board layouts. This series supports reliable operation in industrial and consumer electronics environments.

Supervisors Replacement Considerations

The BD5243G-1 is listed as a recommended replacement with the same SSOP-5 package. Verify electrical parameter differences such as hysteresis voltage and output current capabilities. Confirm that the replacement maintains compatibility with existing circuit designs and thermal requirements.