BD49K45G-TL

Overview

The BD49K45G-TL is a CMOS output voltage detector IC from ROHM Semiconductor, designed for monitoring single power supply lines. It features a fixed detection threshold of 4.5V with ±1% accuracy. The device operates within a supply voltage range of 2.3V to 10V and draws a typical operating current of 600nA at 4.8V. It provides a reset delay of 100µs and functions in an active-low state without manual reset or watchdog capabilities. Packaged in SSOP-3, it supports industrial temperatures from -40°C to +105°C.

Feature Summary

• CMOS push-pull output structure for direct logic interfacing
• High precision voltage detection with ±1% threshold accuracy
• Ultra-low power consumption suitable for battery-operated systems

Applications

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

Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm RoHS compliance and moisture sensitivity level (MSL 3) handling requirements during storage and assembly. Validate package marking against official datasheet specifications to prevent counterfeit substitution.

Selection Notes

Select this component when a fixed 4.5V threshold with high accuracy is required. Consider the CMOS output type for compatibility with standard digital logic families. Evaluate the 100µs reset delay against system timing constraints. Ensure the 2.3V minimum operating voltage aligns with the target application's power rail characteristics.

Part Context

This part belongs to the BD49 series of voltage detectors, characterized by high accuracy and low current consumption. It serves as a supervisory circuit for microprocessors and memory devices. The BD49K45G-TL variant specifically targets applications requiring a 4.5V detection point within the 2.3V to 6.0V detection voltage range available in the family.

Replacement Considerations

BD5245G-1TR is listed as a similar specification replacement with open-drain output and adjustable delay.