BD4949G-TR

Overview

The BD4949G-TR is a standard voltage detector IC from ROHM Semiconductor, designed for monitoring power supply voltages in electronic circuits. It features a CMOS output type and operates within a reset active voltage range of 0.95V to 10V. The device provides an under-voltage detection voltage of 4.9V with a precision of ±1%. It draws a circuit current of 0.60μA when ON and 0.85μA when OFF at Vs=4.8V. The hysteresis voltage is defined as Vs x 0.05. Packaged in SSOP5, it supports a temperature range of -40°C to 105°C.

Feature Summary

• CMOS output interface for direct logic interfacing
• High accuracy voltage detection with ±1% precision
• Ultra-low current consumption for battery-powered applications
• Integrated hysteresis to prevent output oscillation

Applications

• Processor supervisor circuits
• Battery voltage monitoring systems
• Portable electronic devices requiring low power management

Procurement Notes

Verify the specific ordering suffix and package variant against the latest manufacturer datasheet, as supply status may vary. Confirm RoHS compliance and packaging details directly with authorized distributors or the manufacturer before procurement. Ensure the selected part number matches the required detection voltage and output configuration for your design.

Selection Notes

Select this component for applications requiring precise voltage monitoring with minimal power draw. The CMOS output is suitable for digital logic interfaces. Consider the operating temperature range and supply voltage limits to ensure compatibility with the target system environment. Verify that the fixed detection voltage meets the specific threshold requirements of the monitored circuit.

Part Context

This component belongs to the BD49 series of voltage detectors, which are characterized by high accuracy and low current consumption. The series includes various detection voltages to support different power rail monitoring needs. The BD4949G-TR specifically targets the 4.9V detection threshold within this family, offering a reliable solution for supervisory functions in compact packages.

Replacement Considerations

BD5249G-1 is listed as a similar level replacement with the same package. Verify functional equivalence and pinout compatibility before substitution.