BU4319G-TR

Overview

The BU4319G-TR is a CMOS voltage detector from the BU42(43)xxG series, manufactured by ROHM Semiconductor. It operates within a supply voltage range of 0.7 V to 7 V and features an adjustable reset delay timer. The device provides a typical under-voltage detection threshold of 1.9 V with ±1% accuracy. It draws a maximum operating current of 550 nA and includes hysteresis defined as VDET x 0.05. The component is housed in an SSOP-5 package and supports operation temperatures from -40°C to +125°C.

Feature Summary

• CMOS output type for low power consumption
• Adjustable reset delay timer functionality
• High precision voltage detection accuracy
• Wide operating temperature range capability

Applications

• Portable electronic devices requiring low standby current
• Battery-powered systems needing reliable under-voltage monitoring
• Embedded circuits utilizing CMOS logic interfaces

Procurement Notes

Verify the specific ordering suffix and package variant against the official datasheet before procurement. Confirm that the NRND status does not impact long-term supply requirements for existing designs. Ensure compatibility with the target PCB footprint and thermal management specifications during integration planning.

Selection Notes

Select this component when a fixed 1.9 V threshold with high accuracy is required alongside adjustable timing delays. Consider the SSOP-5 package constraints and the CMOS output drive capabilities relative to the load. Evaluate the wide temperature range suitability for harsh environmental applications compared to standard commercial grade alternatives.

Part Context

This part belongs to the BU42(43)xxG family of supervisory circuits designed for low voltage detection. It serves as a specialized power management IC within ROHM's portfolio, focusing on efficiency and precision for compact electronic designs. The series emphasizes minimal quiescent current to extend battery life in portable applications.

Replacement Considerations

The BD5219G-1 is documented as a replacement with the same pinout and package. Verify output type differences, as the substitute uses an open drain configuration instead of CMOS.