BU4238G-TR

Overview

The BU4238G-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply levels in electronic circuits. It features an open-drain output and operates within a supply voltage range of 0.7 V to 7 V. The device provides a typical under-voltage detection threshold of 3.8 V with a precision of ±1%. It includes an adjustable reset delay timer and functions without manual reset or watchdog capabilities. The component supports surface-mount installation in an SSOP-5 package and maintains low power consumption with a circuit current of approximately 0.55 μA at the detection voltage.

Feature Summary

• CMOS technology ensures low power consumption suitable for battery-operated applications
• Adjustable reset delay timer allows customization of response timing
• Open-drain output configuration facilitates flexible interface integration

Applications

• Power supply supervision in portable electronic devices
• Monitoring system integrity in embedded microcontroller circuits
• Voltage level detection in industrial control modules

Procurement Notes

Verify the specific supply status as this component may be classified as not recommended for new designs. Confirm that the SSOP-5 package and reel packaging align with your assembly requirements. Ensure compatibility with the 0.7 V to 7 V operating range and check if the adjustable delay feature meets your timing specifications before finalizing procurement.

Selection Notes

Select this component when a precise 3.8 V threshold with high accuracy is required for voltage monitoring. Consider its low static current and wide operating temperature range for efficient power management. The adjustable delay feature offers flexibility compared to fixed-delay alternatives, making it suitable for systems requiring controlled reset sequencing.

Part Context

This part belongs to the BU42 series of voltage detectors from ROHM Semiconductor, which are designed for supervisory applications. The series typically offers various threshold voltages and packages to support different system requirements. The BU4238G-TR specifically targets applications needing a 3.8 V detection point with adjustable timing characteristics.

Replacement Considerations

The BD5238G-1 is listed as a similar level replacement with the same package type. Verify pinout compatibility and electrical parameter alignment, particularly the threshold voltage and output configuration, before substituting.