BU46L454G-TL

Supervisors Overview

The BU46L454G-TL is a voltage detector IC from ROHM Semiconductor's BU46 series, designed for monitoring single-input power supplies. It features a CMOS output and operates within a maximum supply voltage of 6 V. The device has a threshold voltage of 4.5 V with an accuracy of 1%. It includes a built-in counter timer delay circuit, providing a reset delay time of 400 ms without requiring an external capacitor. The component consumes a typical operating current of 2.8 uA and supports surface mount installation in an SSOP-3 package. It functions reliably across a temperature range of -40 C to +105 C.

Supervisors Feature Summary

• Built-in counter timer delay circuit eliminates the need for external timing capacitors
• High detection accuracy of 1% ensures precise voltage monitoring
• Low current consumption of 2.8 uA supports energy-efficient designs
• CMOS output type provides direct interface compatibility

Supervisors Applications

• Monitoring battery voltage levels in portable devices
• Supervising power supply rails in embedded systems
• Reset generation for microcontrollers during power-up or brown-out events

Supervisors Procurement Notes

Verify the exact part number suffix and manufacturer documentation before procurement, as this component is marked as discontinued. Confirm availability through authorized distributors or surplus suppliers, ensuring the source provides valid RoHS compliance data and original manufacturer traceability. Check for moisture sensitivity labeling requirements during storage and handling.

Supervisors Selection Notes

Select this component when a fixed 4.5 V threshold with 400 ms delay is required for single-channel supervision. Consider the SSOP-3 package size constraints and CMOS output drive capabilities. Ensure the application does not require manual reset or watchdog functionality, as these are absent. Verify that the 6 V maximum supply voltage aligns with the system's power rail specifications.

Supervisors Part Context

This part belongs to the BU45/BU46 series of highly accurate, low current consumption voltage detector ICs. The series is characterized by integrated delay circuits and high precision. The BU46L454G-TL specifically utilizes the 'L' variant characteristics within the broader family, offering specific threshold and packaging options tailored for compact electronic designs requiring reliable power supervision.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the component is discontinued, engineers should consult the official ROHM datasheet for recommended replacement strategies or cross-reference with similar BU46 series parts having compatible thresholds and packages.