BU4320G-TR

Overview

The BU4320G-TR is a CMOS voltage detector IC from the BU43xx series, designed for low-voltage applications with adjustable output delay. It features a detection voltage of 2.0V and a precision of ±1%. The device operates within a reset active voltage range of 0.7V to 7V and utilizes a CMOS output type with an active-low state. It consumes 0.40μA in the ON state and 0.55μA in the OFF state at VDET=4.8V. The hysteresis voltage is defined as VDET x 0.05, with L-output currents of 3.3mA (LowVol) and 6.5mA (HighVol). The internal delay circuit resistance is 10.0MΩ, supporting operation from -40°C to 125°C.

Feature Summary

• Adjustable output delay timer for customized timing control
• High-accuracy voltage detection with built-in hysteresis
• Ultra-low current consumption suitable for battery-powered systems

Applications

• Processor supervisor circuits requiring precise power monitoring
• Battery-operated devices needing low standby current
• Systems utilizing adjustable delay for noise immunity

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches the required package and tape/reel specifications. Ensure compliance with RoHS standards and check for any obsolescence notices prior to procurement. Validate that the supply status aligns with project requirements.

Selection Notes

Select this component when a fixed threshold voltage of 2.0V is required alongside customizable delay characteristics. Consider the CMOS output drive capability and low quiescent current for energy-sensitive designs. Evaluate the operating temperature range and package constraints against the target application environment.

Part Context

The BU4320G-TR belongs to the BU43xx series of CMOS voltage detectors, which offer adjustable delay times and high accuracy. This series supports detection voltages from 0.9V to 4.8V in 0.1V increments. The BU4320 variant specifically targets applications requiring a 2.0V threshold with integrated delay functionality for robust system supervision.

Replacement Considerations

The BD5220G-1TR is a recommended replacement with the same pinout and package. It offers similar detection voltage and adjustable delay features but differs in output type and current consumption specifications.