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The MAX817MESA+T is a microprocessor supervisory circuit manufactured by Maxim Integrated (now part of Analog Devices). It is designed to monitor system power supplies and provide reset signals to ensure proper operation of microprocessors or other digital systems.

Key Specifications:

• Manufacturer: Maxim Integrated (Analog Devices)
• Type: Microprocessor Supervisor
• Package: 8-pin SOIC (MSOP)
• Operating Voltage Range: 1.2V to 5.5V
• Reset Threshold Options: Adjustable or fixed (factory-set)
• Reset Timeout Period: 140ms (min)
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 6µA (typical)

Descriptions:

• Monitors system voltage and asserts a reset signal when the supply voltage drops below a specified threshold.
• Ensures microprocessor starts in a known state during power-up, power-down, or brownout conditions.
• Available in fixed or adjustable threshold versions for flexibility in different applications.

Features:

• Low Power Consumption: Only 6µA typical supply current.
• Manual Reset Input: Allows external pushbutton reset control.
• Power-On Reset (POR) Circuitry: Guarantees valid reset output at power-up.
• Wide Operating Voltage Range: Supports 1.2V to 5.5V systems.
• Compact Package: 8-pin SOIC (MSOP) for space-constrained designs.

This device is commonly used in embedded systems, industrial controls, and battery-powered applications where reliable power monitoring is critical.