BD49K37G-TL

Overview

The BD49K37G-TL is a CMOS voltage detector IC from ROHM Semiconductor, designed for monitoring single power supply lines. It features a fixed detection threshold of 3.7V with a precision accuracy of ±1%. The device operates within a reset active voltage range of 0.95V to 10V and consumes a typical operating current of 900nA. It provides a CMOS output with a fixed reset delay time of 100µs. The component is housed in an SSOP-3 package and supports an operating temperature range from -40°C to +105°C.

Feature Summary

• CMOS output interface for direct logic integration
• High detection accuracy of ±1% threshold voltage
• Ultra-low operating current consumption
• Fixed reset delay timer functionality

Applications

• Processor supervisor circuits
• Battery voltage monitoring systems
• Portable electronic device power management

Procurement Notes

Verify the obsolete status of this component before design finalization. Confirm that the SSOP-3 package dimensions match your PCB footprint requirements. Ensure the 3.7V threshold aligns with your system's brown-out protection needs. Check for moisture sensitivity classification if reflow soldering is planned. Validate that the CMOS output drive capability meets downstream load specifications.

Selection Notes

Select this part when a precise 3.7V threshold is required for low-power applications. The CMOS output simplifies interfacing with digital logic without additional pull-up components. Consider the 100µs delay for timing-sensitive reset sequences. Evaluate the wide operating temperature range for harsh environment suitability. Compare against adjustable delay variants if timing flexibility is needed.

Part Context

This component belongs to the BD49 series of high-precision, low-current voltage detectors. The series offers various fixed detection voltages ranging from 2.3V to 6.0V in 0.1V increments. All devices in this family share similar low-power characteristics and CMOS output structures, ensuring consistent performance across different threshold selections.

Replacement Considerations

The BD5237G-1 is listed as a recommended replacement with similar specifications. Verify package compatibility and electrical parameter alignment before substitution.