MAX16118KA+

Series:	*
Part Status:	Obsolete

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Introduction

The MAX16118KA+ is a family of programmable, extremely low-power, energy-efficient, microprocessor supervisors and reset generators. These are intended for mobile and desktop microprocessor applications. They feature a wide supply voltage of 1.0V to 5.5V, low quiescent current, multiple reset modes, low reset threshold voltage, and a low-voltage reset and monitoring input with an open-drain output.

Application Fields

The MAX16118KA+ is suitable for a variety of applications including system reset and watchdog timer generation, processor monitoring and re-sequencing, system power-up/down sequencing, and microcontroller power control. They are ideal for use in notebook PCs, desktops, and mobile devices, providing additional system reliability and improved system power management. The MAX16118KA+ is especially suitable for portable applications where long battery life and low power is a must. With quick reset outputs and low quiescent current, and a wide supply voltage range, the supervisors help to reduce power and protect the system from reset failures due to power-up transients or other errors. The supervisors are capable of generating system reset in response to processor failures or reset attempts. They can be used to monitor microprocessor activity and generate a reset if the processor fails to execute code within a specified period. A reset is generated when the voltage levels on either the Watchdog Input (WDTIN) or the Manual Reset Input (MRTIN) pin drop below the reset threshold voltage. The reset output is latched until a valid reset is asserted by application of a logic high voltage to the Reset Input (RESET) pin.The MAX16118KA+ is also capable of generating an reset with input from other system sources such as a power supply supervisor, over-temperature sensor, or voltage supervisor. By monitoring these system signals and generating a reset for error conditions outside of the processor, total system reliability is improved.

Working Principle

The MAX16118KA+ is a programmable supervisor designed to improve system reliability and reduce power consumption. It operates by monitoring the power-supply, manual reset, and watchdog signals for power-up transients, reset attempts, and failure assertion.Upon power-up, the supervisor looks for a valid logic high voltage at the power supply input (VCC) and a valid logic low voltage level at Reset Input (RESET) before setting the reset output. The reset output then remains active until the power supply reaches a valid operating voltage level.After power-up, the MAX16118KA+ continues to monitor the Reset, WDTIN, MRTIN and VCC pins. If an erroneous voltage level is detected, or if a counter reaches a timeout period set by the user, the supervisor will generate a reset signal. The signal will be latched until a valid reset is asserted by application of a logic high voltage to the Reset Input pin.The supervisor is also capable of generating an open drain output which can be used to indicate a System OK or reset status. This output can be used to activate an indicator such as an LED, or it can be used to drive a transistor which can enable/disable other system components.

Conclusion

In conclusion, the MAX16118KA+ is designed for use in a variety of applications, including system reset and watchdog timer generation, processor monitoring and re-sequencing, system power-up/down sequencing, and microcontroller power control. It features a wide supply voltage of 1.0V to 5.5V, low quiescent current, multiple reset modes, low reset threshold voltage, and a low-voltage reset and monitoring input with an open-drain output. The supervisor is capable of monitoring multiple system signals and generating a reset in response to processor failures or reset attempts. It also offers open-drain output to be used to indicate System OK or reset status. The MAX16118KA+ is a useful tool to improve system reliability and reduce power consumption.

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