MAX6879ETE+T

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As Power Management Integrated Circuits (PMICs), Supervisors are device intended to protect microcontrollers and other circuits by preventing them from running erratic, faulty, or otherwise unsafe operations.

The MAX6879ETE+T Supervisory Circuit exemplifies this class of PMICs, providing comprehensive and reliable system reset, power-on reset (POR) and supervisor functions for microprocessor system designs.

A key application of this device is to monitor the microcontroller or microprocessor’s supply voltage (VCC). The MIC6879ETE+T continuously monitors VCC during normal and brown-out conditions. In addition, the device monitors the status of two push-buttons (PB1 and PB2) to provide manual reset and power-on reset functions.

The MAX6879ETE+T is a great solution for reliable and robust power-up and power-down reset sequencing. It offers a programmable reset time-delay, an output-voltage reset option, and a manual reset sequence.

The reset concept in a Supervisor circuit is that it should never reset the system when it is supposed to be running. That is the primary job of the MAX6879ETE+T. It must have a reliable monitoring mechanism to decide when a reset is necessary. The MAX6879ETE+T monitors the supply voltage (VCC) and two push buttons (PB1 and PB2) to detect incorrect operation, and selectively restarts the system if it is needed.

Power-on reset (POR) is the first step in controlling the reset of a system after any interruption of power. The MAX6879ETE+T achieves this with a fixed delay of 250 ms. It then ensures safe operation by monitoring the VCC and resetting the system in the event of a brown-out condition.

The MAX6879ETE+T also monitors two push-buttons, PB1 and PB2, and will reset the system if both buttons are pressed at the same time. This feature provides ‘manual reset’ capability and is useful in debugging or software resetting a system.

The MAX6879ETE+T Supervisory circuit is resistor-programmable, allowing for a wide range of application scenarios. It also offers an output-voltage reset option, which is useful for adding additional safety margins to power-on reset.

The MAX6879ETE+T is a high-performance and power-efficient device. It offers a wide range input voltage range from 1.8V to 5.25V, and support an operating temperature range between –40°C to +125°C. It has RoHS-compliant packaging, and exceptional temperature coefficient (C/A), leakage current and resistance over these temperature ranges

In conclusion, the MAX6879ETE+T is an excellent Supervisory Circuit for microprocessor-based systems. It offers reliable system reset, power-on reset, and manual reset functions, as well as robust reset sequencing. It is designed to protect microcontrollers and other circuits from running erratic or dangerous operations, and it can effectively detect brown-outs or other abnormal conditions.

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