BU46K254G-TL

Overview

The BU46K254G-TL is a fixed-delay voltage detector IC from ROHM Semiconductor, designed for monitoring single power supply rails. 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 2.5 V with a precision of ±1%. A built-in counter timer provides a fixed reset delay of 400 ms, eliminating the need for external capacitors. Quiescent current consumption is typically 2.3 µA in operation and 2.8 µA in standby. It is housed in an SSOP-3 package and supports an operating temperature range from -40°C to +105°C.

Feature Summary

• Built-in counter timer circuit eliminates the requirement for external delay-setting capacitors.
• CMOS output type ensures low power consumption and direct interface compatibility.
• High detection accuracy of ±1% maintains reliable system supervision across temperature variations.

Applications

• Microprocessor reset circuits
• Battery-powered equipment supervision
• Portable electronic device power management

Procurement Notes

Verify component authenticity through authorized channels due to the NRND status. Confirm package integrity and moisture sensitivity handling requirements upon receipt. Cross-reference ordering suffixes to ensure exact match with design specifications. Review latest datasheet revisions for any updates to electrical characteristics or mechanical dimensions before final procurement approval.

Selection Notes

Select this component when a fixed 400 ms delay is acceptable for system reset timing. The SSOP-3 package suits space-constrained designs requiring single-input monitoring. Ensure the 2.5 V threshold aligns with the target supply rail. Consider the NRND status for long-term production viability and evaluate alternative active parts if new design introduction is required.

Part Context

This part belongs to the BU45/BU46 series of highly accurate, low-current voltage detectors. The series integrates internal delay timers to simplify circuit design by removing external components. The BU46K254G-TL specifically targets applications needing precise 2.5 V supervision with minimal quiescent current draw in compact surface-mount packages.

Replacement Considerations

The BD5225G-1 is listed as a similar specification replacement with comparable 2.5 V detection and CMOS output. Verify pinout compatibility and delay timer differences before substitution. The BD5225G-1 offers adjustable delay options unlike the fixed delay of the BU46K254G-TL.