BU4944FVE-TR

Supervisors Overview

The BU4944FVE-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for supervisory circuit applications. It operates within a supply voltage range of 0.8 V to 10 V and features a fixed threshold voltage of 4.4 V with an accuracy of ±1%. The device provides an open-drain output type and includes a reset delay timer of 100 µs. It functions without manual reset or watchdog timer capabilities. The component supports surface mount installation in a VSOF-5 package and maintains a low static current consumption of 850 nA. It is rated for operation across a temperature range from -40°C to +105°C.

Supervisors Feature Summary

• CMOS technology ensures low power consumption suitable for battery-operated systems
• Fixed threshold voltage detection with high precision accuracy
• Integrated reset delay timer for stable system recovery
• Open-drain output configuration for flexible logic interfacing

Supervisors Applications

• Portable electronic devices requiring efficient power management
• Embedded systems needing reliable voltage supervision
• Battery-powered equipment monitoring critical power levels

Supervisors Procurement Notes

Verify the specific manufacturing lot date code and RoHS compliance status directly with authorized distributors, as this component may be subject to end-of-life restrictions. Confirm that the VSOF-5 package dimensions align with your PCB footprint requirements before finalizing procurement orders. Ensure that the open-drain output interface matches your target microcontroller input specifications.

Supervisors Selection Notes

Select this component when a fixed 4.4 V threshold is required for system supervision. The open-drain output necessitates an external pull-up resistor for proper logic level translation. Consider the 100 µs reset delay duration against your system's startup timing requirements. Verify that the operating temperature range meets the environmental conditions of the intended application environment.

Supervisors Part Context

This part belongs to the BU49 series of voltage detectors from ROHM Semiconductor. It shares functional similarities with other parts in the family but is distinguished by its specific 4.4 V threshold and VSOF-5 packaging. The series is designed for general-purpose voltage monitoring in consumer and industrial electronics.

Supervisors Replacement Considerations

BD5244G-1 is listed as a recommended replacement with similar specifications, though it utilizes an SSOP5 package instead of VSOF-5.