BU4248G-TR

Overview

The BU4248G-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring single power supply lines. It features an adjustable reset delay timer and an open-drain output type. The device operates within a supply voltage range of 0.7 V to 7 V, with a typical under-voltage detection threshold of 4.8 V. It exhibits high precision with a ±1% accuracy rating for the detection voltage. The component supports a wide operating temperature range from -40°C to +125°C and consumes low current, specified at 0.40 μA during operation and 0.55 μA in standby mode when Vdet is 4.8 V. It is housed in an SSOP-5 package.

Feature Summary

• Adjustable reset delay timer functionality allows customization of the reset pulse width via external components.
• Open-drain output structure provides flexibility for interfacing with various logic families and voltage levels.
• Low power consumption characteristics support battery-operated applications with minimal quiescent current draw.

Applications

• Microprocessor system reset circuits requiring specific timing delays
• Portable electronic devices utilizing low-voltage power supplies
• Industrial control systems operating across extended temperature ranges

Procurement Notes

Verify the obsolete status of this component before procurement, as it is marked as Not Recommended for New Designs (NRND). Confirm availability through authorized distributors or surplus channels. Ensure that the SSOP-5 package dimensions match your PCB footprint requirements. Check for RoHS compliance documentation if required by your manufacturing standards. Consider lead times associated with end-of-life products.

Selection Notes

Select this component only for maintenance or existing design updates where the BU4248G-TR is already integrated. Evaluate the adjustable delay feature against fixed-delay alternatives if new designs are considered. Compare the 4.8 V threshold with other available detectors in the BU42 series to ensure compatibility with the target supply voltage. Assess the open-drain output requirements against the system's pull-up resistor configuration.

Part Context

This part belongs to the BU42(43)xxG series of voltage detectors from ROHM Semiconductor. These devices are specialized supervisory circuits intended for monitoring power rails in digital systems. The series typically offers various threshold voltages and packaging options to suit different application needs. The BU4248G-TR specifically targets applications requiring a 4.8 V detection point with customizable reset timing.

Replacement Considerations

The BD5248G-1TR is listed as a similar level replacement with the same pinout and package. Verify electrical parameter compatibility, particularly the detection voltage and current consumption, before substitution. Note that the BD5248G-1TR is recommended for new designs, whereas the BU4248G-TR is not.