BU4348F-TR

Overview

The BU4348F-TR is a voltage detector with an adjustable delay time, manufactured by ROHM Semiconductor. It features a typical under-voltage detection voltage of 4.8V with ±1% precision. The reset active voltage range spans from 0.7V to 7V, utilizing a CMOS output type that activates in a low state. The device includes an adjustable delay timer and exhibits hysteresis voltage defined as VDET multiplied by 0.05. Circuit current consumption is specified at 0.40μA when ON and 0.55μA when OFF at the 4.8V detection threshold. It operates within a temperature range of -40°C to 125°C and is housed in an SOP4 package measuring 2.0x2.1mm.

Feature Summary

• Adjustable delay timer functionality for customizable reset timing
• High precision voltage detection with ±1% accuracy tolerance
• Low power consumption suitable for battery-operated systems
• Wide operating temperature range for industrial environments

Applications

• Microprocessor system reset circuits
• Battery-powered device supervision
• Industrial control system monitoring
• Consumer electronics power management

Procurement Notes

Verify supply status carefully as this component may be subject to last-time buy or obsolescence notices. Confirm package compatibility and pinout alignment during integration planning. Ensure ordering part numbers match specific tape-and-reel requirements. Check RoHS compliance documentation for regulatory adherence. Validate replacement options if production continuity is required.

Selection Notes

Select this component when adjustable delay times are necessary for system stability. Consider the CMOS output drive capability and low current consumption benefits. Evaluate the wide reset voltage range against system operating conditions. Assess thermal performance within the specified temperature limits. Compare against newer alternatives if long-term availability is a primary concern.

Part Context

This voltage detector belongs to ROHM's series of supervisory circuits designed for reliable system monitoring. It provides essential protection against unstable power conditions through precise detection thresholds. The adjustable delay feature allows customization for various application timing requirements. Integration into embedded systems ensures robust operation under fluctuating power scenarios.

Replacement Considerations

The BD5248G-1 is listed as a recommended replacement with the same pinout configuration. Verify package differences between SOP4 and SSOP5 formats during transition. Confirm electrical parameter compatibility including detection voltage and output types.