MAX6802UR31D3+

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Maxim Integrated is a global leader in the design, development, and manufacturing of analog, mixed-signal, and digital signal processing (DSP) integrated circuits (ICs), processors, and microcontrollers. Their products are found in millions of products in a wide range of markets, including communications, computing, consumer electronics, automotive, industrial automation, and medical. The MAX6802UR31D3+ is an ultra-low power supervisor device included in their Power Management IC (PMIC) – Supervisors family. It is a low-cost, ultra-low-power supervisor that provides advanced monitoring, reset generation, and system power-on indication.

The MAX6802UR31D3+ integrates a precision voltage monitor, watchdog timer and manual reset input to guard against system failure. It is designed to operate from an ultra-low supply current of 2.5μA (typ.), adding energy efficiency to a handheld device. The reset generation is designed to eliminate multiple levels of logic and, thus, reduces the design complexity and cost. The MAX6802UR31D3+ also provides an open-drain system-power-good (SPG) output signal to indicate that the system power has stabilized.

Other features of the MAX6802UR31D3+ include an adjustable reset threshold voltage, windowed watchdog timeout, active-low manual reset input, and an adjustable watchdog timeout period. The device is suitable for applications such as wireless systems, computing systems, industrial control equipment, medical and health care equipment, telecommunications systems, automotive systems, and more. It is available in a tiny 8-pin TDFN package and operates over temperature range of -40°C to +85°C.

The MAX6802UR31D3+ is a typical voltage-comparator-based IC characterized by a wide range of applications. The device uses two comparators to compare the power supply and the reference voltages and determine the status of the system. The two comparators are designed such that when the power supply connected to the device exceeds the upper threshold voltage, the system is declared as healthy, and the SPG output is set high. If the voltage drops below the lower threshold voltage, the reset output is asserted and the system will shut down.

The device also has an adjustable reset threshold voltage, delay time, and a watchdogtimer. The reset threshold voltage and delay time are adjusted by external resistors. The watchdog timer monitors system activity periodically and initiates a reset if the activity is not within a certain programmed range. A manual reset input is also provided which allows the resetting of the system if necessary. The device is available in different packages including 8-pin TDFN, 8-pin SOIC, 8-pin µMAX, and 9 ball WLCSP.

In addition, the MAX6802UR31D3+ provides additional protection features such as power supply fault protection, power surge protection, power-up sequencing and over-voltage protection. The power supply fault protection prevents the system from powering up in the event of a sudden disruption in the power supply. Power surge protection helps to protect the system from various power surge possibilities. Power-up sequencing ensures that system components are powered in the right order avoiding potential start-up issues. Finally, over-voltage protection helps to protect the system from excessive voltage levels.

The MAX6802UR31D3+ provides advanced monitoring, reset generation, and system power-on indication at low supply current. It is suitable for applications such as wireless systems, computing systems, industrial control equipment, medical and health care equipment, telecommunications systems, automotive systems and more. It provides additional protection features such as power supply fault protection, power surge protection, power-up sequencing and over-voltage protection. The device is available in various packages including 8-pin TDFN, 8-pin SOIC, 8-pin µMAX, and 9 ball WLCSP.

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