BU4317FVE-TR

Overview

The BU4317FVE-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for supervisory circuit applications. It features an adjustable reset delay time and operates within a supply voltage range of 0.7 V to 7 V. The device provides a typical under-voltage detection threshold of 1.7 V with a precision of ±1%. It utilizes a VSOF5 package and supports surface-mount installation. The component exhibits ultra-low current consumption, with operating currents specified at 0.40 µA (ON) and 0.55 µA (OFF) when the detection voltage is 4.8 V. It functions reliably across an extended temperature range from -40°C to +125°C.

Feature Summary

• CMOS output type providing low-level reset signal
• Adjustable reset delay timer functionality
• Ultra-low current consumption design
• High accuracy voltage detection with hysteresis

Applications

• Microprocessor system reset circuits
• Battery-powered device supervision
• Portable equipment power management
• General-purpose voltage monitoring

Procurement Notes

Verify component authenticity through authorized channels due to obsolete status. Confirm datasheet revisions match specific production batches. Check RoHS compliance documentation for environmental standards. Validate package marking codes against official ROHM identifiers. Ensure storage conditions maintain moisture sensitivity level integrity prior to assembly.

Selection Notes

Select this component for applications requiring precise voltage monitoring with customizable delay timing. Consider the CMOS output drive capability for direct logic interfacing. Evaluate the low quiescent current benefits for battery longevity. Compare thermal performance requirements against the specified operating temperature range. Assess package dimensions for PCB layout compatibility.

Part Context

This part belongs to the BU42(43)xxFVE series of standard CMOS voltage detectors. It represents a legacy product line focused on high-accuracy supervision with minimal power draw. The series offers various detection voltages in 0.1V steps. The BU4317FVE-TR specifically targets mid-range voltage thresholds with flexible timing control.

Replacement Considerations

BD5217G-1TR is documented as a recommended replacement with similar specifications. Note that the substitute uses an SSOP5 package instead of VSOF5. Verify pinout compatibility before implementation. Check output type differences between CMOS and open drain configurations.