BU4244G-TR

Overview

The BU4244G-TR is a CMOS voltage detector with an adjustable delay timer, manufactured by ROHM Semiconductor. It features a typical under-voltage detection threshold of 4.4 V with ±1% precision and operates within a reset active voltage range of 0.7 to 7 V. The device utilizes an open-drain output type with a low reset active state. Power consumption is characterized by a circuit current of 0.40 μA when active (at Vdet=4.8V) and 0.55 μA when off. It is housed in an SSOP-5 package and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Adjustable delay timer functionality for customized reset timing
• High precision under-voltage detection with ±1% accuracy
• Ultra-low power consumption suitable for battery-operated systems
• Open-drain output configuration for flexible logic interfacing

Applications

• Portable electronic devices requiring low standby current
• Battery-powered equipment needing reliable power monitoring
• General-purpose supervisory circuits in consumer electronics

Procurement Notes

Verify the specific suffix 'TR' indicates tape-and-reel packaging upon ordering. Confirm that the BU4244G is marked as not recommended for new designs; evaluate long-term availability and lifecycle status before finalizing procurement plans. Ensure compatibility with existing design constraints given the component's production status.

Selection Notes

Select this component when a fixed 4.4 V threshold is required alongside customizable reset delays. Compare against the BD5244G-1 if a different package or slightly different precision specifications are acceptable. Consider the open-drain output requirement for system interface design. Verify that the SSOP-5 footprint matches the target PCB layout constraints.

Part Context

This part belongs to the BU42xxG series of voltage detectors from ROHM Semiconductor. These components are designed for low-voltage monitoring applications. The BU4244G specifically targets the 4.4 V detection point within this family, offering a balance between precision and power efficiency for general supervisory tasks.

Replacement Considerations

The BD5244G-1 is listed as a similar level replacement with the same pinout. Verify package compatibility and precise electrical parameter alignment before substitution.