BU46K344G-TL

Overview

The BU46K344G-TL is a voltage detector IC from ROHM Semiconductor's BU45/BU46 series, designed for monitoring single-input power supplies. It features a CMOS output type and operates within a supply voltage range of 0.6 V to 6 V. The device detects voltages with a threshold accuracy of ±1% and includes a built-in counter timer delay circuit, eliminating the need for external capacitors. The reset delay time is fixed at 400 ms. It functions without manual reset or watchdog capabilities, maintaining a low quiescent current of 2.8 µA. The component is housed in an SSOP-3 package and supports operation across temperatures from -40°C to +105°C.

Feature Summary

• Built-in counter timer delay circuit removes requirement for external delay-setting capacitors
• High detection accuracy of ±1% ensures reliable voltage threshold monitoring
• Low current consumption of 2.8 µA optimizes efficiency in battery-powered applications
• CMOS output interface provides direct compatibility with digital logic circuits

Applications

• Monitoring microprocessor power supply rails
• Battery-operated electronic devices requiring voltage supervision
• Embedded systems needing automatic reset upon undervoltage events
• Portable consumer electronics with limited power budgets

Procurement Notes

Verify component authenticity through authorized distributors or official manufacturer channels. Confirm RoHS compliance status and check for obsolescence notices, as availability may be restricted. Ensure storage conditions account for moisture sensitivity levels specified in the datasheet to prevent package damage prior to assembly.

Selection Notes

Select this component when a fixed 400 ms reset delay and CMOS output are required. Consider alternative BU46 series variants if different threshold voltages or open-drain outputs are needed. Evaluate thermal performance within the -40°C to +105°C operating range for specific environmental constraints.

Part Context

This part belongs to the BU45/BU46 series of highly accurate, low-current voltage detectors. These ICs integrate internal delay timers to simplify circuit design by removing passive components. The series offers various threshold options packaged in compact forms like SSOP-3, targeting space-constrained portable electronics.

Replacement Considerations

Public confirmed substitute part numbers: None identified.