BU46K342G-TL

Overview

The BU46K342G-TL is a voltage detector IC from the ROHM BU45/BU46 series, designed for monitoring single-input power supplies. It features a CMOS output and operates within a supply voltage range of 0.6 V to 6 V. The device detects an under-voltage threshold of 3.4 V with 1% accuracy. It includes a built-in counter timer delay circuit providing a fixed reset delay of 200 ms, eliminating the need for external capacitors. The component consumes 2.8 uA during operation and functions across a temperature range of -40°C to +105°C. It is housed in an SSOP-3 package.

Feature Summary

• Built-in counter timer delay circuit removes requirement for external delay-setting capacitors
• High detection accuracy of 1% for precise voltage monitoring
• Ultra-low current consumption suitable for battery-powered applications
• CMOS output type compatible with digital logic interfaces

Applications

• Portable electronic devices requiring low standby current
• Battery-operated systems needing reliable under-voltage protection
• Embedded microcontroller reset circuits
• General-purpose supervisory circuits in consumer electronics

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to obsolete status. Confirm RoHS compliance details via official datasheets. Check regional availability restrictions as distribution may be limited. Ensure storage conditions account for moisture sensitivity levels specified in the package documentation before assembly.

Selection Notes

Choose this part when a fixed 200 ms delay and 3.4 V threshold are required without external timing components. Consider the CMOS output drive capability against load requirements. Evaluate the SSOP-3 footprint compatibility with existing PCB layouts. Compare operating temperature range against environmental constraints. Assess current consumption benefits against alternative open-drain variants if interface flexibility is needed.

Part Context

This component belongs to the BU45/BU46 series of voltage detectors, characterized by high accuracy and low power consumption. The series integrates internal delay timers to simplify circuit design. The BU46 variant specifically utilizes CMOS outputs, differing from the open-drain outputs found in the BU45 series. This family targets applications where space efficiency and minimal external component count are critical design factors.

Replacement Considerations

No public confirmed substitute part numbers are available for this specific model.