BD4933FVE-TR

Overview

The BD4933FVE-TR is a standard voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-channel supply voltages. 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 0.95V to 10V and utilizes a CMOS output type with a low-active reset state. Key electrical characteristics include a circuit current of 0.60μA at Vs=4.8V when active and 0.85μA when off. Hysteresis is defined as Vs multiplied by 0.05. The component supports an L-output current of 0.4mA in the low voltage state and 2mA in the high voltage state. It functions reliably across a temperature range of -40°C to 105°C.

Feature Summary

• CMOS output architecture providing low-active reset signaling
• Integrated hysteresis function proportional to supply voltage
• Single-channel under-voltage detection capability

Applications

• Portable equipment power management
• Battery-powered system supervision
• General-purpose electronic circuit monitoring

Procurement Notes

Verify the obsolete status and Last Time Buy designation before finalizing procurement plans. Confirm that the VSOF-5 package dimensions align with existing PCB footprints. Ensure compatibility with the 0.95V to 10V operating range for the target application environment.

Selection Notes

Select this component for applications requiring a fixed 3.3V detection threshold with CMOS logic compatibility. Consider the specific hysteresis characteristic relative to the supply voltage rather than the detection voltage. Evaluate the trade-off between the higher quiescent current compared to newer alternatives against the availability of the VSOF-5 package.

Part Context

This part belongs to the BD49 series of standard voltage detectors from ROHM Semiconductor. It serves as a legacy alternative to the BD5233G-1 series, which offers similar specifications but differs in package type (SSOP-5) and output structure (open drain). The BD49 series is characterized by its compact VSOF-5 packaging and CMOS output drive capabilities.

Replacement Considerations

The BD5233G-1 is listed as a recommended replacement with similar specifications. Note differences in package type (SSOP-5 vs. VSOF-5), output structure (open drain vs. CMOS), and maximum operating temperature.