BU4933G-TR

Supervisors Overview

The BU4933G-TR is a low-voltage CMOS voltage detector manufactured by ROHM Semiconductor, designed for power supply monitoring applications. It features a fixed threshold voltage of 3.3 V with a precision accuracy of ±1%. The device operates within a supply voltage range of 700 mV to 7 V and supports a maximum power dissipation of 540 mW. It consumes a typical operating current of 550 nA and a static current of 450 nA. The component is housed in an SSOP-5 surface-mount package and functions reliably across an extended temperature range from -40°C to +125°C.

Supervisors Feature Summary

• CMOS output type provides direct logic interface compatibility without requiring external pull-up resistors.
• Ultra-low current consumption design minimizes power drain in battery-operated or energy-sensitive systems.
• High detection accuracy ensures reliable system reset activation at the specified threshold voltage.

Supervisors Applications

• Monitoring microprocessor and microcontroller power supplies for under-voltage conditions.
• Providing reset signals for digital logic circuits and memory devices.
• Ensuring system stability in portable electronic equipment and battery-powered devices.

Supervisors Procurement Notes

Verify the specific ordering suffix matches the required tape-and-reel configuration for automated assembly processes. Confirm that the SSOP-5 package dimensions align with the target PCB footprint and soldering profile requirements. Ensure compliance with RoHS directives if applicable to the end product regulations. Check the supply status as this component may be subject to lifecycle changes.

Supervisors Selection Notes

Select this component when a fixed 3.3 V detection threshold is required for standard logic families. Consider the CMOS output capability if interfacing directly with high-impedance inputs without additional circuitry. Evaluate the low quiescent current against system power budget constraints. Verify that the operating temperature range meets the environmental specifications of the intended application environment.

Supervisors Part Context

This part belongs to the BU49xx series of standard CMOS voltage detectors from ROHM Semiconductor. The series offers various detection voltages to accommodate different logic levels. The BU4933G-TR specifically targets applications requiring precise monitoring around the 3.3 V rail common in modern digital electronics.

Supervisors Replacement Considerations

BD5233G-1TR is listed as a recommended replacement with the same package and similar electrical characteristics.