BU46K382G-TL

Overview

The BU46K382G-TL is a supervisory circuit voltage detector IC manufactured by ROHM Semiconductor. It features a fixed threshold voltage of 3.8V with a precision of ±1%. The device operates within an input voltage range of 0.6V to 6V and utilizes a CMOS output type. It includes a fixed reset delay timer of 200ms and lacks manual reset or watchdog timer functions. The component is housed in an SSOP-3 package, supports surface mount installation, and operates across a temperature range of -40°C to +105°C.

Feature Summary

• Fixed threshold voltage detection at 3.8V for precise under-voltage monitoring
• CMOS output configuration compatible with standard logic interfaces
• Integrated fixed 200ms reset delay timer for stable signal generation

Applications

• Power supply supervision in electronic systems
• Under-voltage detection for battery-powered devices
• Reset signal generation for microcontroller circuits

Procurement Notes

Verify the obsolete status and limited availability before procurement planning. Confirm that the SSOP-3 package matches the target PCB footprint. Ensure the 3.8V threshold aligns with system requirements as no adjustable variants exist within this specific part number. Check RoHS compliance details if required for specific manufacturing standards.

Selection Notes

Select this component when a fixed 3.8V detection threshold is required for single-input monitoring. The CMOS output is suitable for low-power digital logic interfacing. Consider the fixed 200ms delay for timing constraints. Verify that the 6V maximum supply voltage covers the operating range. This part is not suitable for applications requiring manual reset or watchdog functionality.

Part Context

This voltage detector belongs to the BU46 series of supervisory circuits from ROHM. It is designed for compact applications due to its small SSOP-3 package. The series typically offers high accuracy and low quiescent current for efficient power management. The specific model provides a fixed threshold, distinguishing it from adjustable variants in the broader product family.

Replacement Considerations

The BD5238G-1 is listed as a similar specification replacement option. Verify compatibility regarding the SSOP-5 package difference and adjustable delay feature compared to the fixed delay of the original part.