MAX6865UK24D4L+T

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MAX6865UK24D4L+T is a type of power management integrated circuit (PMIC) classified as supervisors. It is designed to provide logic supervising functions in battery-powered systems. It is a low power CMOS device powered by lithium coin cells, single- or dual-cell NiCd/NiMH batteries and with single-cell Li-Ion or Li-polymer batteries.

The MAX6865UK24D4L+T contains a system reset circuit (SRC), watchdog timer (WDT), and low battery detector (LBD) for single cell Li-Ion applications. SRC is used to reset the power-on sequence in the system and monitor the system power supply. It also provides active-low output reset signal when VCC voltage drops below the reset threshold voltage or when the WDT times out. The WDT monitors system activity, and can be programmed to reset the system after a preset interval defined by the external resistor and capacitor. The WDT also controls the logic levels of the four Push-Pull Output (PPO) pins. The LBD monitors the battery voltage and drives the PPO pin when the battery-voltage drops below the threshold level.

The primary application field of MAX6865UK24D4L+T is automotive and consumer electronics, such as GPS and DVD players. In automotive applications, MAX6865UK24D is used to reset an electronic control unit (ECU) when the system voltage drops to specific thresholds and to keep iterative control circuits from cycling on and off. In consumer electronics, MAX6865UK24D4L+T is used for watchdog timer and low voltage monitoring to prevent components from burning out or the system from malfunctioning in case of power spikes or dips due to unforeseen events.

In terms of working principle, the MAX6865UK24D4L+T monitors the VCC voltage and generates a system reset signal and PPO signal when the voltage drops below the reset threshold levels or when the watchdog timer times out. The dual POWER-ON Reset (POR) and Software Reset provides immunity to high transients found in automotive and consumer applications. Additionally, the LBD circuitry monitors the battery voltage and drives the PPO pin when the battery voltage drops below the threshold level. The WDT monitors system activity, and can be programmed to reset the system after a preset interval defined by the external resistor and capacitor.

Overall, MAX6865UK24D4L+T is a type of PMIC - Supervisors, which are designed to provide logic supervising functions in battery-powered systems. Its applications are mainly in automotive and consumer electronics, and its working principle is to monitor the VCC voltage and generate a system reset signal, PPO signal, and LBD signal when the voltage drops below specific thresholds. This makes MAX6865UK24D4L+T a reliable power supervision device.

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