BD4938FVE-TR

Overview

The BD4938FVE-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for supervisory circuit applications. It features a typical under-voltage detection threshold of 3.8 V with a precision of ±1%. The device operates within a reset active voltage range of 0.95 to 10 V and utilizes a CMOS output type. It includes a fixed reset delay timer of 100 µs and maintains a low active state. The component functions without manual reset or watchdog timer capabilities. It is housed in a VSOF-5 package and supports an operating temperature range from -40°C to +105°C.

Feature Summary

• CMOS output structure for reliable logic interfacing
• Fixed 100 µs reset delay timer for stable power-up sequencing
• High precision voltage detection with ±1% accuracy
• Low power consumption suitable for battery-operated systems

Applications

• Portable electronic devices requiring voltage supervision
• Battery-powered equipment monitoring
• General-purpose microprocessor reset circuits
• Industrial control system power management

Procurement Notes

Verify the obsolete status and last-time-buy availability through official ROHM channels before procurement planning. Confirm that the VSOF-5 package dimensions match your PCB footprint requirements. Ensure compatibility with the 3.8 V threshold for your specific application voltage rails. Check for any updated environmental compliance documentation if required for your manufacturing region.

Selection Notes

Select this component when a fixed 3.8 V threshold and CMOS output are required. Consider the VSOF-5 package size constraints during layout design. Evaluate the 100 µs delay against your system's startup timing needs. Compare static current specifications against other options if ultra-low power is critical for your battery life targets.

Part Context

This part belongs to the BD49 series of standard voltage detectors from ROHM Semiconductor. It is designed as a compact solution for monitoring single voltage rails in space-constrained designs. The VSOF-5 package allows for efficient board space utilization compared to larger packages.

Replacement Considerations

BD5238G-1TR is listed as a recommended replacement with similar specifications and pinout compatibility.