BU4318G-TR

Overview

The BU4318G-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-input power supply voltages. It operates within a supply voltage range of 0.7 V to 7 V and features an adjustable reset delay timer. The device provides a typical under-voltage detection threshold of 1.8 V with ±1% precision. It is housed in an SSOP-5 surface-mount package and supports operation across a temperature range of -40°C to +125°C. Key electrical characteristics include a maximum power dissipation of 540 mW and low standby current consumption.

Feature Summary

• CMOS output type for direct logic interface compatibility
• Adjustable reset delay timer functionality
• High accuracy voltage detection with ±1% precision
• Wide operating temperature range suitable for industrial environments

Applications

• Portable equipment requiring low voltage monitoring
• Battery-powered systems needing reliable power supervision
• Industrial control units utilizing CMOS logic interfaces

Procurement Notes

Verify the component status as Not Recommended for New Designs (NRND) before procurement. Confirm that the SSOP-5 package and 1.8 V threshold align with existing design requirements. Ensure compliance with RoHS directives and validate the supplier's authenticity to avoid counterfeit components during sourcing.

Selection Notes

Select this component when a fixed 1.8 V threshold with adjustable timing is required. Consider the SSOP-5 package constraints for PCB layout. Evaluate the NRND status impact on long-term supply continuity compared to recommended alternatives like the BD5218G-1 series if new designs are initiated.

Part Context

This part belongs to the BU42(43)xxG series of supervisory circuits from ROHM Semiconductor. It is specifically engineered for low-voltage detection applications where precise monitoring and adjustable delays are critical. The series emphasizes low power consumption and high reliability for portable and industrial electronics.

Replacement Considerations

The BD5218G-1 is listed as a similar level replacement with the same pinout and package. Verify functional equivalence regarding the 1.8 V threshold and adjustable delay specifications before substitution.