BU4933FVE-TR

Supervisors Overview

The BU4933FVE-TR is a standard CMOS voltage detector IC from ROHM Semiconductor, designed for low-voltage monitoring applications. It features a typical under-voltage detection threshold of 3.3V with a precision of ±1%. The device operates within a reset active voltage range of 0.7V to 7V and supports a supply voltage up to 7V. It consumes ultra-low current, specified at 0.40μA (ON) and 0.55μA (OFF) at Vs=4.8V. The output type is CMOS, and it lacks manual reset, watchdog timer, or adjustable delay functions. Hysteresis is set at Vdet x 0.05. It is housed in a VSOF-5 package and operates between -40°C and +125°C.

Supervisors Feature Summary

• Ultra-low current consumption for extended battery life
• High accuracy voltage detection with built-in hysteresis
• CMOS output interface compatible with digital logic

Supervisors Applications

• Portable electronic devices requiring power supervision
• Battery-operated systems needing low quiescent current
• General purpose voltage monitoring circuits

Supervisors Procurement Notes

Verify the specific suffix FVE indicates the VSOF-5 package variant, distinct from SOP-4 or SSOP-5 versions. Confirm end-of-life status as sourcing may be limited to last-time buys or existing inventory. Ensure RoHS compliance requirements are met for the target assembly process. Cross-reference the exact detection voltage tolerance against system design margins before final procurement.

Supervisors Selection Notes

Select this component when a CMOS output is required instead of open-drain types found in similar series members. The VSOF-5 package offers a compact footprint suitable for space-constrained designs. Consider the operating temperature range and supply voltage limits relative to the application environment. Verify that the lack of manual reset functionality aligns with the system's recovery strategy.

Supervisors Part Context

This part belongs to the BU49xx series of standard CMOS voltage detectors. It shares functional similarities with other variants like BU4933F and BU4933G but differs in package type and specific electrical characteristics. The series is characterized by high accuracy and low power consumption, targeting portable and battery-powered electronics.

Supervisors Replacement Considerations

BD5233G-1 is listed as a recommended replacement with similar specifications, though it uses an SSOP-5 package and open-drain output. BD4933FVE is another alternative with a wider reset voltage range (0.95V to 10V) and different output drive capabilities.