BD49L38G-TL

Overview

The BD49L38G-TL is a CMOS voltage detector IC from ROHM Semiconductor, designed for supervisory circuit applications. It features a fixed detection threshold of 3.8 V with an accuracy of ±1%. The device operates within a supply voltage range up to 10 V and consumes a typical operating current of 900 nA. It provides a reset delay time of 100 µs and lacks manual reset or watchdog timer functions. The component is housed in an SSOP-3 package, suitable for surface mount installation, and supports an operating temperature range from -40°C to +105°C.

Feature Summary

• CMOS output structure for direct interface with digital logic circuits
• High detection accuracy of ±1% for precise voltage monitoring
• Ultra-low power consumption with typical current draw of 900 nA
• Compact SSOP-3 surface-mount packaging for space-constrained designs

Applications

• Microcontroller system power supervision
• CPU voltage monitoring in embedded systems
• DSP power management circuits
• Battery-operated device low-voltage indication

Procurement Notes

Verify the exact suffix G-TL against official ROHM documentation to confirm package type and tape-and-reel configuration. Confirm end-of-life status and lead times with authorized distributors, as availability may be limited. Ensure compatibility with existing PCB footprint and reflow soldering profiles specified for SSOP-3 packages.

Selection Notes

Select this component when a fixed 3.8 V threshold with high precision is required. The CMOS output is suitable for low-noise digital interfaces. Consider alternative BD49 series variants if different detection voltages or open-drain outputs are needed. Verify thermal performance within the -40°C to +105°C range for the specific application environment.

Part Context

Part of the BD49xxx series of highly accurate, low-current voltage detectors. This series offers various fixed detection voltages from 2.3V to 6.0V in 0.1V increments. The BD49L38G-TL specifically targets applications requiring reliable power-on reset signals with minimal quiescent current consumption.

Replacement Considerations

Check ROHM datasheets for other BD49 series parts with similar thresholds. Verify pinout compatibility for direct replacement. Consider BD48 series if open-drain output is acceptable instead of CMOS.