BD49L33G-TL

Overview

The BD49L33G-TL is a CMOS voltage detector IC from ROHM Semiconductor, designed for monitoring single-channel power supply voltages. It features a fixed detection threshold of 3.3 V with an accuracy of ±1%. The device operates within a supply voltage range up to 10 V and consumes only 900 nA of operating current. It provides a reset delay time of 100 µs and lacks manual reset or watchdog timer functions. Packaged in an SSOP-3 format, it supports surface mount installation and functions across a temperature range of -40°C to +105°C.

Feature Summary

• CMOS output interface for direct logic integration
• Ultra-low power consumption suitable for battery-operated systems
• High precision voltage detection with minimal drift

Applications

• Portable electronic devices requiring low standby current
• Battery-powered equipment needing reliable under-voltage protection
• Embedded systems utilizing standard CMOS logic levels

Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm package integrity and moisture sensitivity handling requirements before assembly. Cross-reference datasheet revisions to ensure compatibility with existing design specifications. Validate thermal performance within the specified operating temperature range during final system testing.

Selection Notes

Select this component when a fixed 3.3 V threshold is required without adjustable delay features. Consider the SSOP-3 package constraints for PCB layout space. Evaluate the absence of manual reset functionality against system recovery needs. Compare power consumption metrics with alternative supervisors if extended battery life is critical.

Part Context

Part of the BD49 series, which focuses on high-accuracy, low-current voltage detectors. This specific model targets applications where precise 3.3 V monitoring is essential. It complements other variants in the family offering different thresholds or additional features like watchdog timers.

Replacement Considerations

BD5233G-1 is listed as a similar specification replacement option.