BU46K252G-TL

Overview

The BU46K252G-TL is a CMOS voltage detector IC from ROHM Semiconductor, designed for monitoring single-input power supply lines. It features a fixed threshold voltage of 2.5 V with an accuracy of ±1%. 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 draws a typical operating current of 2.8 µA and dissipates up to 700 mW. The component supports an extended industrial temperature range from -40°C to +105°C and is housed in an SSOP-3 package.

Feature Summary

• Built-in counter timer delay circuit eliminates the need for external capacitors for delay time setting.
• CMOS output type ensures low power consumption suitable for battery-operated applications.
• High detection accuracy of 1% maintains precise voltage supervision across the operating range.

Applications

• Monitoring microprocessor reset signals
• Battery voltage supervision in portable devices
• Power management circuits requiring fixed delay reset

Procurement Notes

Verify the obsolete status indicated by NRND classification before procurement. Confirm availability through authorized distributors as production may be limited. Ensure compatibility with existing PCB footprints and thermal requirements. Check RoHS compliance documentation for specific regional regulations. Validate that the SSOP-3 package matches design constraints.

Selection Notes

Select this component when a fixed 2.5 V threshold and 200 ms delay are required without external timing components. Consider the low quiescent current for energy-sensitive designs. Evaluate the SSOP-3 package size against board space limitations. Compare performance against newer series if long-term supply stability is critical for the product lifecycle.

Part Context

This part belongs to the BU45/BU46 series of highly accurate, low current consumption voltage detector ICs. The series is characterized by built-in delay timers and CMOS outputs. The BU46K252G-TL specifically targets applications needing a 2.5 V detection level with minimal external component count.

Replacement Considerations

The BD5225G-1TR is listed as a recommended replacement with similar specifications. Note differences in package (SSOP5 vs SSOP3) and output type (open drain vs CMOS). Verify pinout compatibility and electrical parameter alignment before substitution.