BD49K51G-TL

Overview

The BD49K51G-TL is a CMOS output voltage detector IC from the ROHM BD49 series, designed for precise power supply monitoring. It features a fixed detection threshold of 5.1V with an accuracy of ±1%. The device operates within a supply voltage range of 0.95V to 10V and consumes a typical operating current of 900nA. It provides a reset delay time of 100µs and outputs an active-low signal without manual reset or watchdog timer capabilities. Packaged in a compact SSOP-3 format, it supports operation across temperatures from -40°C to +105°C.

Feature Summary

• High-precision voltage detection with ±1% accuracy for reliable system supervision
• Ultra-low current consumption of 900nA to extend battery life in portable applications
• CMOS output interface ensuring compatibility with standard digital logic circuits

Applications

• Processor supervisor circuits requiring stable voltage monitoring
• Battery-powered devices needing low quiescent current management
• Embedded systems utilizing CMOS logic families for reset generation

Procurement Notes

Verify the specific suffix TL indicates tape and reel packaging configuration when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the SSOP-3 package dimensions match your PCB footprint requirements. Check for any moisture sensitivity level restrictions during storage and handling procedures.

Selection Notes

Select this component when a fixed 5.1V threshold is required for CMOS-based reset signals. Consider the 100µs delay for timing-sensitive applications. Evaluate the 900nA current draw against strict power budget constraints. Verify that the absence of a watchdog timer meets the system safety requirements.

Part Context

This part belongs to the BD49xxx series of high-accuracy, low-current voltage detectors. The series offers various detection voltages from 2.3V to 6.0V in 0.1V increments. All devices in this family share similar low-power characteristics and CMOS output structures, differing primarily in their specific threshold settings.

Replacement Considerations

The BD5250G-1TR is listed as a similar specification replacement with a 5.0V threshold. Note differences in package type (SSOP-5 vs SSOP-3) and adjustable delay features.