BD49L53G-TL

Overview

The BD49L53G-TL is a CMOS voltage detector IC from ROHM Semiconductor, designed for monitoring single power supply lines. It features a fixed threshold detection voltage of 5.3 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 functions across an extended temperature range from -40°C to +105°C. Housed in a compact SSOP-3 package, it lacks manual reset, watchdog timer, or chip enable functions.

Feature Summary

• CMOS output interface for direct logic integration
• High precision voltage detection with ±1% accuracy
• Ultra-low power consumption suitable for battery applications
• Extended industrial temperature operation capability

Applications

• Portable electronic devices requiring low standby current
• Battery-powered systems needing reliable under-voltage monitoring
• Industrial control circuits operating in harsh thermal environments
• Embedded microprocessor reset supervision

Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm RoHS compliance documentation matches specific manufacturing batches. Validate pinout orientation as the GND pin may be rotated compared to standard configurations. Ensure storage conditions account for moisture sensitivity levels prior to reflow soldering processes.

Selection Notes

Select this component when a fixed 5.3 V threshold is required without adjustable delay features. Consider the SSOP-3 footprint constraints against available board space. Evaluate the 900 nA quiescent current against system power budgets. Verify that the absence of a watchdog timer aligns with system reliability requirements.

Part Context

This part belongs to the BD49 series of high-accuracy voltage detectors. It shares family characteristics such as CMOS output and low current consumption with variants like BD49K23G-TL and BD49L55G-TL. The series offers detection voltages ranging from 2.3 V to 6.0 V in 0.1 V increments, providing standardized options for various supply rail monitoring needs.

Replacement Considerations

BD5250G-1TR is listed as a similar specification replacement, though it differs in package type (SSOP-5 vs SSOP-3) and output structure (open drain vs CMOS). Verify pin compatibility and electrical parameter alignment before substitution.