BU4227G-TR

Overview

The BU4227G-TR is a single-channel voltage detector manufactured by Rohm Semiconductor, designed for supervisory circuit applications. It operates within a supply voltage range of 0.7 V to 7 V and features an adjustable reset delay timer. The device provides an open-drain output with low-active reset signaling. Key electrical parameters include a typical under-voltage detection threshold of 2.7 V and a precision of ±1%. It functions across a wide temperature range from -40°C to +125°C. The IC consumes 0.40 μA in the active state and 0.55 μA in the off state at Vdet=4.8V. It is housed in a compact 5-SSOP package.

Feature Summary

• Provides simple reset or power-on reset functionality with an open-drain output structure.
• Features an adjustable reset delay timer to accommodate specific system startup requirements.
• Operates with low power consumption suitable for battery-driven applications.

Applications

• Portable electronic devices requiring low-power supervision
• Battery-operated equipment monitoring
• General-purpose voltage monitoring in embedded systems

Procurement Notes

Verify component authenticity through authorized distributors. Confirm RoHS3 compliance and check for whisker information if required by assembly standards. Note that this part is marked as Not Recommended for New Designs (NRND); ensure existing design compatibility before procurement. Validate package integrity upon receipt.

Selection Notes

Select this component when a single-channel supervisor with adjustable delay is needed. Ensure the monitored voltage falls within the 0.7 V to 7 V operating range. Consider the open-drain output requirement for pull-up resistor integration. Verify thermal performance within the -40°C to +125°C range for the target environment.

Part Context

This component belongs to the BU42xx series of voltage detectors from Rohm Semiconductor. It is part of a family of CMOS low-voltage detectors designed for portable and battery-powered applications. The BU4227G-TR specifically offers a 2.7 V threshold with adjustable timing, distinguishing it from fixed-timer variants in the same series.

Replacement Considerations

BD5227G-1TR is a confirmed substitute with the same pinout and package. Verify functional equivalence regarding threshold voltage and delay adjustability before substitution.