BU4818FVE-TR

Supervisors Overview

The BU4818FVE-TR is a standard voltage detector IC manufactured by ROHM Semiconductor. It features an under-voltage detection threshold of 1.8V with a precision of ±0.9%. The device provides an open drain output type and operates within a reset active voltage range of 0.8 to 6V. It does not include a manual reset, watchdog timer, or adjustable delay function. The circuit current is 0.23μA in the on state and 0.27μA in the off state at Vdet=4.8V. Hysteresis voltage is set at Vdet x 0.05. It is housed in a VSOF5 package.

Supervisors Feature Summary

• CMOS technology for low power consumption
• Open drain output configuration
• Fixed under-voltage detection threshold
• Compact VSOF5 package

Supervisors Applications

• Processor supervisor circuits
• Battery voltage monitoring
• Portable electronic devices

Supervisors Procurement Notes

Verify the exact ordering suffix and package variant against the official datasheet before procurement. Confirm supply status as the component may be discontinued or subject to last-time buy restrictions. Ensure compatibility with existing PCB footprint and reflow soldering profiles. Cross-reference the specific revision level to guarantee electrical parameter consistency.

Supervisors Selection Notes

Select this component when a fixed 1.8V under-voltage detection threshold is required. The open drain output suits systems needing external pull-up resistors. Consider the low operating current for battery-powered applications. Verify that the absence of a watchdog timer and manual reset meets the system safety requirements.

Supervisors Part Context

This part belongs to the BU48xx series of standard voltage detectors from ROHM. It is designed for monitoring power supply voltages in portable equipment. The series offers various detection thresholds to accommodate different logic families and battery types. The VSOF5 package allows for space-constrained designs.

Supervisors Replacement Considerations

BD5218G-1TR is listed as a similar specification replacement with comparable 1.8V detection voltage and open drain output.