BU4945G-TR

Supervisors Overview

The BU4945G-TR is a CMOS voltage detector IC from ROHM Semiconductor, designed for monitoring power supply voltages. It features a fixed threshold voltage of 4.5 V with a precision of ±1%. The device operates within a supply voltage range of 0.7 V to 7 V and draws a typical operating current of 400 nA at the detection voltage. It utilizes an SSOP-5 surface-mount package and supports an output active state of low. The component is rated for operation between -25°C and +125°C.

Supervisors Feature Summary

• CMOS voltage detection with high accuracy
• Low power consumption design
• Compact SSOP-5 surface mount packaging

Supervisors Applications

• Microprocessor power supply monitoring
• Portable battery-powered equipment
• Multi-output power supplies

Supervisors Procurement Notes

Verify the obsolete status of this part number before procurement, as it may be discontinued or not recommended for new designs. Confirm availability through authorized distributors and check for valid replacement alternatives such as the BD5245G-1 series if sourcing new inventory is restricted.

Supervisors Selection Notes

Select this component when a fixed 4.5 V threshold is required for system supervision. Ensure the application environment stays within the specified temperature range and that the low quiescent current meets power efficiency requirements. Verify compatibility with the target microcontroller reset logic levels.

Supervisors Part Context

This component belongs to the BU49xx series of standard voltage detectors manufactured by ROHM Semiconductor. These devices are engineered for reliable power management in compact electronic systems, providing essential supervision functions without requiring external components for basic threshold detection.

Supervisors Replacement Considerations

The BD5245G-1 is listed as a similar level replacement with the same pinout and package.