BD49K33G-TL

Overview

The BD49K33G-TL is a CMOS output voltage detector IC from the BD49 series, manufactured by ROHM Semiconductor. It features a fixed detection threshold of 3.3V with ±1% precision accuracy. The device operates within a supply voltage range of 0.95V to 10V and includes a fixed reset delay timer of 100μs. It consumes low operating current, typically 900nA, and functions reliably across an extended temperature range from -40°C to +105°C. Packaged in a compact SSOP-3 format, it provides active-low reset signals for supervisory applications.

Feature Summary

• CMOS output interface providing active-low reset signal generation
• High precision voltage detection with ±1% threshold accuracy
• Ultra-low power consumption suitable for battery-operated systems
• Fixed reset delay timer ensures stable system initialization

Applications

• Processor supervisor circuits requiring precise voltage monitoring
• Battery-powered electronic devices needing low standby current
• Embedded systems utilizing CMOS-compatible logic interfaces
• Portable consumer electronics requiring compact supervision solutions

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity and pin alignment against SSOP-3 specifications. Ensure storage conditions comply with moisture sensitivity levels prior to assembly. Cross-reference ordering suffixes to match exact electrical parameters and packaging requirements for integration.

Selection Notes

Select this component when a fixed 3.3V detection threshold with high accuracy is required. Consider the CMOS output type for direct logic interfacing without additional pull-up components. Evaluate the 100μs reset delay against system startup timing requirements. Assess the extended temperature range suitability for harsh environmental operations compared to commercial grade alternatives.

Part Context

This part belongs to the BD49 series of highly accurate, low-current voltage detectors. The series offers various detection voltages ranging from 2.3V to 6.0V in 0.1V increments. The BD49K33G-TL specifically targets applications needing a 3.3V supervision point with minimal power overhead and reliable reset generation capabilities.

Replacement Considerations

BD5233G-1TR is listed as a similar specification replacement option. Verify differences in output type (Open Drain vs CMOS) and reset delay adjustability before substitution.