BU4918FVE-TR

Supervisors Overview

The BU4918FVE-TR is a standard CMOS voltage detector IC from ROHM Semiconductor, designed for high-accuracy power supply monitoring. It features a fixed detection threshold of 1.8V with ±1% precision and operates within a supply voltage range of 0.7V to 7V. The device utilizes a VSOF5 package (1.6x1.6mm) and offers a CMOS output type with low active current consumption of 0.40µA at 4.8V detection voltage. It supports an operating temperature range from -40°C to +125°C and includes hysteresis defined as VDET x 0.05.

Supervisors Feature Summary

• High-accuracy voltage detection with ±1% precision
• Ultra-low current consumption for extended battery life
• CMOS output interface compatible with digital logic
• Wide operating temperature range for industrial applications

Supervisors Applications

• Portable electronic devices requiring low standby current
• Battery-powered systems needing reliable under-voltage protection
• Industrial control circuits operating in extreme temperatures
• Microprocessor reset circuits ensuring stable startup

Supervisors Procurement Notes

Verify the specific suffix FVE-TR confirms the VSOF5 package and tape-and-reel packaging format. Confirm the 1.8V detection threshold matches system requirements. Check RoHS compliance status and lead times through authorized distributors. Ensure EOL or last-time-buy status if applicable to long-term production plans.

Supervisors Selection Notes

Select this component when a fixed 1.8V threshold is required with CMOS output drive capabilities. Compare against open-drain alternatives if higher noise immunity or level shifting is needed. Consider the VSOF5 footprint constraints versus larger packages like SSOP5 for thermal management needs.

Supervisors Part Context

Part of the BU49xx series of standard CMOS reset ICs offering detection voltages from 0.9V to 4.8V in 0.1V increments. Designed for applications demanding precise voltage monitoring with minimal power impact. The series provides flexibility in selecting exact thresholds without external resistors.

Supervisors Replacement Considerations

BD5218G-1 is listed as a similar specification replacement with comparable 1.8V detection voltage but differs in package (SSOP5 vs VSOF5) and output type (Open drain vs CMOS). Verify pinout compatibility and electrical parameter alignment before substitution.