MCP1321T-46LE/OT

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The MCP1321T-46LE/OT is a low-power microcontroller supervisor device that is an integrated part of the PMIC (Power Management Integrated Circuit), also referred to as a \'supervisor\'. The device is designed to monitor microprocessor and logic supply rails, protecting them against brownouts, power spikes and noise transients.

When system voltage is below the preset threshold, the MCP1321T-46LE/OT activates an output signal (MCP1321#) to alert the system of a potential supply voltage problem. This alert can be used to indicate system or application failure, or to initiate corrective measures, such as software reset. The device can also be used to monitor system power on initial startup.

The MCP1321T-46LE/OT offers several key advantages over other supervisor solutions, including a supervisory supply voltage range from 2.2V to 5.5V, an adjustable reset/power-on delay, programmable reset asserts/de-asserts time and a power fail flag. The device is also capable of accepting up to 12 different input voltages, providing a wide range of system voltage supervision.

The architecture of the MCP1321T-46LE/OT is based on a low-power threshold detect circuit, which is connected to an external comparator. The comparator acts as a voltage reference, comparing the system voltage to the threshold detect circuit\'s detected voltage. Once the voltage crosses the preset threshold, the comparator output generates a logic signal.

The output of this logic signal is fed into the device\'s logic circuitry, which then initiates the reset process. The logic circuitry also includes a status register that can be used to monitor the current system status, as well as the state of the reset latch.

The MCP1321T-46LE/OT has several application fields. In addition to protecting logic and microprocessor supply rails from power glitches and brownouts, it can also be used to protect inductive loads, such as relays or motors, from short bursts of current or sudden power losses. The device can also be used to detect power supply failure during system start-up and alerts the user to any potential problems, allowing for preventive measures to be taken before any permanent damage is done.

The MCP1321T-46LE/OT is an excellent choice for system power management applications and provides a reliable solution for monitoring supply voltage. Its adjustable reset/power-on delay ensures that power-up and power-down operations are reset at the correct time. The device also offers an integrated power fail flag and an adjustable threshold detection voltage.

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