BD49K55G-TL

Overview

The BD49K55G-TL is a standard voltage detector IC from ROHM Semiconductor, designed for monitoring single power supply lines. It features a fixed detection threshold of 5.5V with a precision of ±1%. The device operates within a supply voltage range of 0.95V to 10V and delivers a CMOS output that goes active low when the monitored voltage drops below the threshold. It includes a reset delay timer and offers high accuracy without requiring manual reset or watchdog functions. The component is housed in a compact SSOP-3 package.

Feature Summary

• Provides precise voltage monitoring with a fixed 5.5V detection threshold and ±1% accuracy.
• Delivers an active-low CMOS output signal upon under-voltage detection.
• Incorporates a built-in reset delay timer to ensure stable system recovery.
• Operates over a wide supply voltage range from 0.95V to 10V.

Applications

• Monitoring power supply rails in embedded systems
• Processor supervisor circuits requiring under-voltage protection
• Battery-powered devices needing voltage level indication

Procurement Notes

Verify component authenticity through authorized distributors due to potential counterfeits. Confirm RoHS compliance status and moisture sensitivity level (MSL) prior to soldering. Check for obsolescence notices as this part may be subject to last-time buy restrictions. Ensure proper handling procedures are followed given its surface-mount packaging.

Selection Notes

Select this component when a fixed 5.5V threshold is required with high accuracy. Consider the CMOS output type and active-low polarity for interface compatibility. Evaluate the SSOP-3 package size against board space constraints. Compare performance metrics like quiescent current and reset delay against alternative supervisory circuits if specific timing or power requirements differ.

Part Context

This part belongs to the BD49 series of voltage detectors from ROHM Semiconductor. The series is characterized by high precision and low current consumption. The BD49K55G-TL specifically targets applications requiring reliable under-voltage detection at the 5.5V level. It serves as a critical component for ensuring system stability in electronic designs sensitive to power fluctuations.

Replacement Considerations

BD5250G-1TR is listed as a similar specification replacement, though it features an open-drain output and adjustable delay timer instead of CMOS push-pull and fixed delay. Verify pinout compatibility and electrical parameter differences before substitution.