MAX6337US22D2+T

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The MAX6337US22D2+T microelectronic circuit combines both independent overvoltage and undervoltage sensing functions into one integrated circuit, to form what is known as a Supervisor IC.

Supervisor ICs are power supply monitoring devices used to monitor and adjust the steady state of voltage signal levels within an electronic photographic system.

The MAX6337US22D2+T specifically features a microprocessor that can differentiate between signal over/undervoltage conditions, where it will act to power the system down to prevent potential damage due to the over/undervoltage situation.

The circuit is mainly used in low-voltage applications such as digital cameras, notebook computers, and other black box devices.

Its working principle consists of a few simple steps. First, an undervoltage/overvoltage threshold voltage will be set. The MAX6337US22D2+T microprocessor will then constantly “look” for an undervoltage/overvoltage signal across the node being monitored. When the specified threshold is reached, the processor will “shut down” the system to prevent any system malfunctions from the over/undervoltage issue. The shut down action is in the form of an active low reset signal, which is sent to the system’s microcontroller.

The MAX6337US22D2+T can also, with some additional circuitry, be used as a reset verifier, which is an important function when it comes to ensuring the systems reliability. This type of circuit is used to verify that the reset input voltage is within a safe range before the system will operate.

The MAX6337US22D2+T Supervisors IC also has a built in active low reset output that is used to indicate an undervoltage/overvoltage situation to the systems microcontroller. This ensures that the microcontroller will not actuate any commands prematurely. The reset output can also be used in combination with a watchdog timer to prevent any system lockups or freezes due to the over/undervoltage.

The MAX6337US22D2+T Supervisors IC requires very minimal external components, which help to reduce system space requirements and cost while still providing reliable power monitoring. The device includes a high-current, low-power Schottky dioide which helps to ensure a low voltage threshold, as well as a low-current, high-power transistor which helps to provide a minimal reset active time.

The MAX6337US22D2+T Supervisors IC is a reliable and cost-effective device for applications that require power supply monitoring and adjustment. It is designed for applications that may experience rapid power cycling and can be used in most low-voltage applications such as digital cameras, notebook computers, and other black box devices. Its shuttle design helps to reduce space requirements, and its integrated low-cost Schottky diode makes it ideal for applications that require cost-efficiency.

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