BD4949FVE-TR

Series:	BD49xxx
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Voltage Detector
Number of Voltages Monitored:	1
Output:	Push-Pull, Totem Pole
Reset:	Active Low
Reset Timeout:	--
Voltage - Threshold:	4.9V
Operating Temperature:	-40°C ~ 105°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SOT-665
Supplier Device Package:	5-VSOF
Base Part Number:	BD49

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Introduction to BD4949FVE-TR

BD4949FVE-TR is a highly efficient and reliable supervisor PMIC (Power Management Integrated Circuit). It is manufactured in a small and compact SOT-23 package and designed to monitor microprocessor and system reset in a wide variety of applications. The BD495FVE-TR is a low voltage supervisor and maintains power supply sequencing by providing an accurate reset signal to system startups and microprocessors. It is an ideal choice for embedded systems and system reset applications.

Application Field and Working Principle of BD4949FVE-TR

The BD4949FVE-TR is suitable for a wide variety of applications, including system controllers, embedded systems, and other products that need accurate reset control. System controllers are used in embedded applications, such as personal digital assistant (PDA) controllers, gaming console controllers, and others. It can also be used in safety system applications, such as medical or industrial devices.The BD4949FVE-TR works on the principle of detection and resetting the microprocessors when the power supply fails or falls below the threshold. It provides an accurate and reliable reset signal to the microprocessor, ensuring proper functioning and continued operation of the system in case of power failure.The BD4949FVE-TR has an operating voltage of 1.8 to 5.5V and a reset threshold voltage of 2.6V with an accuracy of ±1%. The reset threshold voltage is adjustable and can be set with a step size of 0.2V. Its reset pulse timing range is from 0.2 to 3 ms and it has a reset active timeout period of 4 ms. It also has an active low open drain output and the reset output is guaranteed to be high until the monitoring circuits detect a voltage below the threshold.The BD4949FVE-TR monitor circuit also has additional features such as Watchdog Timer and Brown-Out detection. The Watchdog Timer is used to detect if the system has crashed or hung and it provides a reset signal to restart the system when this occurs. The Brown-Out detection feature is used to detect if the voltage has dropped below a pre-defined value and it provides a reset signal to improve system reliability and prevent potential damage.

Conclusion

The BD4949FVE-TR is a highly efficient and reliable supervisor PMIC designed to monitor microprocessors and system reset in a wide variety of applications. It has an operating voltage of 1.8 to 5.5V and a reset threshold voltage of 2.6V with accuracy of ±1%. It also has a reset pulse timing range of 0.2 to 3ms and a reset active timeout period of 4ms. Its features and functions make it suitable for a wide variety of applications, including embedded systems, system controllers, safety systems, and more.

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