BU4938FVE-TR

Supervisors Overview

The BU4938FVE-TR is a CMOS voltage detector IC manufactured by ROHM Semiconductor, designed for monitoring single power supply rails. It features a typical under-voltage detection threshold of 3.8V with a precision of ±1%. The device operates within a supply voltage range of 0.7V to 7V and supports a wide operating temperature range from -40°C to +125°C. It utilizes a VSOF-5 surface-mount package and draws ultra-low static current, typically 0.55µA at Vdet=4.8V in the off state. The output type is CMOS, and it lacks manual reset or watchdog timer functions.

Supervisors Feature Summary

• Ultra-low current consumption design suitable for battery-powered applications
• High accuracy voltage detection with ±1% tolerance
• Wide operating temperature range extending to +125°C
• Compact VSOF-5 surface mount package

Supervisors Applications

• Microcontroller system supervision
• Logic circuit power monitoring
• Battery-operated electronic devices

Supervisors Procurement Notes

Verify component authenticity through authorized distributors due to obsolete status. Confirm RoHS compliance and check for whisker information requirements. Ensure the VSOF-5 package dimensions match PCB footprint specifications. Review datasheet for handling precautions regarding moisture sensitivity level 1.

Supervisors Selection Notes

Select this component when a fixed 3.8V threshold is required for systems operating up to 7V. Consider the CMOS output drive capability against load requirements. Evaluate the absence of hysteresis or delay timers if noise immunity or specific timing sequences are critical for the target application design.

Supervisors Part Context

This part belongs to the BU49xx series of standard voltage detectors. It complements other variants like BU4932FVE-TR and BU4937FVE-TR which offer different detection thresholds. The series provides options for both open drain and CMOS outputs across various voltage steps.

Supervisors Replacement Considerations

BD5238G-1TR is listed as a similar specification replacement option.