BU45K352G-TL

Overview

The BU45K352G-TL is a fixed-delay voltage detector IC from ROHM Semiconductor, designed for supervisory circuit applications. It features a threshold voltage of 3.5 V with ±1% precision and a fixed reset delay timer of 200 msec. The device operates within a supply voltage range of 0.6 V to 6 V and offers an open-drain output type. It consumes 2.3 μA in the ON state and 2.8 μA in the OFF state, with hysteresis set at VDET x 0.05. Packaged in SSOP-3, it supports temperatures from -40°C to +105°C.

Feature Summary

• Fixed delay time functionality ensures consistent reset timing without external components.
• Open-drain output interface allows flexible connection to various logic levels.
• Low power consumption design suitable for battery-operated systems.

Applications

• Microprocessor system reset circuits
• Battery voltage monitoring
• Power supply supervision

Procurement Notes

Verify component authenticity through authorized channels due to NRND status. Confirm package integrity upon receipt as moisture sensitivity requires proper handling. Check datasheet revisions for any updates to electrical characteristics or pin configurations before final integration into production designs.

Selection Notes

Select this part when a precise 3.5 V threshold and fixed 200 ms delay are required. Consider the SSOP-3 package constraints for PCB layout. Evaluate current consumption requirements against the 2.8 μA standby value. Ensure operating temperature range meets environmental specifications.

Part Context

This component belongs to the BU45/BU46 series of voltage detectors. It is classified as Not Recommended for New Designs (NRND) by the manufacturer. Existing designs may continue using it, but new projects should consider alternative solutions.

Replacement Considerations

The BD5235G-1TR is listed as a recommended replacement with similar specifications. Note that the substitute uses an SSOP-5 package instead of SSOP-3, requiring footprint adaptation. Verify compatibility of reset delay and output characteristics during transition.