RNA51953AFP#H0

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Push-Pull, Totem Pole
Reset:	Active Low
Reset Timeout:	Adjustable/Selectable
Voltage - Threshold:	4.25V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.173", 4.40mm Width)
Supplier Device Package:	8-SOP
Base Part Number:	RNA51953

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IntroductionRNA51953AFP#H0 is an advanced, integrated device developed and provided by ON Semiconductor, which is widely used in many different fields, such as the automotive, industrial, and consumer applications. This device is specifically designed to provide an over- and under-voltage monitoring as well as a protection/off feature to protect circuits during power up and power down in the systems. It is well-suited for multi-level protection that requires both active and passive supply sequencing.Application fields of RNA51953AFP#H0 RNA51953AFP#H0 is a highly integrated device with various functionalities, including over-voltage and under-voltage protection, over-temperature protection, and system reset. It is mainly applied to protect electronic devices and components from unexpected events and power surges when used in industrial, automotive, and consumer application fields. It also provides a one-shot reset for microprocessors and/or microcontrollers when power is restored, thus avoiding the need for multiple reset signals from the system controller.RNA51953AFP#H0 can be used in various system designs. It can be used as a backup controller to secure processor reset in the case of power failures, or as a backup supervisor to protect components in power management systems during power-on reset, power-off reset, and over-voltage and undervoltage events. It can also be used in LED lighting systems, boards and enclosures to protect the circuits against unexpected events.Working principle of RNA51953AFP#H0The working principle of RNA51953 AFP#H0 mainly relies on its main functional architecture, which consists of a wide input voltage range, an undervoltage monitoring circuit and a power good output comparator. It also contains an RT input, a reset output, an Enable input and an active or passive power-good timing circuit.The wide input voltage range of the device allows for the monitoring of both over-voltage and undervoltage events, providing reliable protection for the connected system. The power good output comparator enables the active or passive debounce of Power-On/Reset (POR/RES) signals. This ensures a proper reset of the connected components when the power is restored. Additionally, the Enable input allows for system-level reset control, which will provide a graceful shutdown when required. When in operation, the presence of the main voltage is constantly monitored by the undervoltage monitoring circuit. If a fault or power failure is detected, the undervoltage monitoring circuit will deactivate the reset output, disabling the output and effectively disconnecting any powering circuits. Conversely, during power-on reset, power-off reset or overvoltage/undervoltage events, the reset output will be activated, which will reset the system. ConclusionIn conclusion, RNA51953AFP#H0 is an advanced, integrated device developed and provided by ON Semiconductor and widely used in many different fields, such as the automotive, industrial, and consumer applications. It has a wide input voltage range, an undervoltage monitoring circuit, and a power good output comparator to effectively monitor, protect, and reset the connected system. It can be used in various system designs as a backup controller or supervisor.

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