MAX6858UK29D4+T

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The MAX6858UK29D4+T is a supervisor, or a power management device that guards microprocessors, FPGAs, ASICs, and memory form fault conditions. This device provides complete overvoltage and brownout protection to monitor power supplies and active device faults that could otherwise adversely affect system performance or cause destructive latch-up conditions. The chip comes with a package of four dedicated lines: an active-low reset to indicate voltage tolerance, a precharge enable to protect from faults on VCC, and two active-high POK (power-on-key) outputs for graceful power-up and power-down control.

The MAX6858UK29D4+T monitors supply voltage for active devices, such as digital circuits and I/O controllers, and is designed for extended ranges of supply voltages. Further, it is a low-power device, with a typical operating current of less than 1µA at 4.5V and 0.8µA at 3.3V supply voltages. This means it can effectively guard the device with minimal additional power.

The MAX6858UK29D4+T is ideal for use in embedded systems, with its support for two power-on-key outputs, which allow for graceful power-up and power-down during system boot. The active-low reset output is also highly reliable, as it does not have a delayed response. A precharge enable line also allows for extra protection from transient voltages.

In terms of its application field, the MAX6858UK29D4+T is suited for any system that requires reliable supply voltage regulation, even in noisy environments. It is particularly suitable for embedded applications that require multiple power-on-key outputs and active-low monitoring of the supply voltage. With its low operating current, it is also relatively power-efficient, making it well-suited to battery-powered embedded systems.

The working principle behind the MAX6868UK29D4+T is relatively simple: it monitors system supply voltages to ensure they remain within the appropriate range. It accomplishes this through its active-low reset output, which is set low if the system voltage droops below the undervoltage threshold. Meanwhile, its precharge enable line is designed to guard against faults on the power supply by deactivating during any precharge sequence for increased safety. Further, its two power-on-key outputs are capable of controlling automatic power-up and power-down procedures.

In summary, the MAX6858UK29D4+T is a PMIC (power management integrated circuit) designed specifically for embedded systems, with four dedicated lines for regulating supply voltages and two power-on-key outputs for orderly power-up and power-down sequences. Due to its low operating current, it is also ideal for battery-powered systems.

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