BU46K442G-TL

Overview

The BU46K442G-TL is a fixed-delay type voltage detector IC manufactured by ROHM Semiconductor. It features a CMOS output and monitors a single input channel with a threshold voltage of 4.4 V. The device provides a reset delay time of 200 ms and operates within a supply voltage range of 0.6 V to 6 V. It exhibits high accuracy of ±1% for detection voltage and maintains low quiescent current consumption of 2.8 µA. The component supports an operating temperature range from -40°C to +105°C and is housed in an SOT-23-3 package.

Feature Summary

• Built-in counter timer delay circuit eliminates the need for external capacitors for delay time setting
• CMOS output type provides direct interface compatibility with digital logic circuits
• High detection voltage accuracy ensures reliable system supervision under varying conditions

Applications

• Microprocessor reset circuits requiring fixed delay timing
• Battery-powered devices needing low standby current monitoring
• Embedded systems supervising power supply integrity

Procurement Notes

Verify the obsolete status and end-of-life designation before procurement planning. Confirm availability through authorized distributors or secondary market channels as standard supply may be discontinued. Ensure replacement components meet identical electrical specifications and pinout requirements for seamless integration into existing designs without modification.

Selection Notes

Select this component when a fixed 200 ms reset delay is required alongside precise 4.4 V threshold monitoring. Consider the SOT-23-3 package constraints and CMOS output drive capabilities. Evaluate thermal performance within the specified industrial temperature range and verify that the 2.8 µA quiescent current aligns with system power budget requirements for battery-operated applications.

Part Context

This part belongs to the BU45/BU46 series of highly accurate, low current consumption voltage detector ICs. The series integrates internal delay timers to simplify circuit design by removing external timing components. These detectors are designed for supervisory applications where reliable voltage monitoring and controlled reset timing are critical for system stability.

Replacement Considerations

BD5244G-1TR is documented as a recommended replacement with similar specifications.