The MAX6807XR26+T is a microprocessor supervisory circuit manufactured by Maxim Integrated. It is designed to monitor voltage levels in a system and provide reset signals to microprocessors and microcontrollers when voltage levels fall outside acceptable limits. This ensures that the system starts up correctly and operates reliably, preventing data corruption and system crashes.

Applications

• Microprocessor-based systems
• Embedded systems
• Critical voltage monitoring
• Power supply monitoring
• Battery-powered devices

Features

• Precision voltage monitoring: Accurately monitors the input voltage with a threshold of 2.63V.
• Integrated watchdog timer: Prevents system lockup by providing a reset if the microprocessor fails to strobe the watchdog input within a specified time.
• Manual reset input: Allows for external reset initiation.
• Open-drain reset output: Offers flexibility in interfacing with various microprocessors.
• Small package size: Available in a compact SOT23 package, saving board space.
• Low supply current: Minimizes power consumption in battery-powered applications.
• Immune to short voltage transients: Ensures reliable reset assertion even during short voltage drops.

Benefits

• Improved system reliability: Prevents system malfunction due to voltage fluctuations.
• Protection against data corruption: Ensures data integrity by resetting the system during voltage drops.
• Simplified system design: Integrates voltage monitoring and reset functions into a single chip.
• Reduced board space: Small package size allows for compact system designs.
• Extended battery life: Low supply current minimizes power consumption in battery-powered devices.

Additional Details

The MAX6807XR26+T operates over a wide temperature range, typically from -40°C to +85°C. It features a reset timeout period to ensure the microprocessor has sufficient time to start up correctly after a reset is triggered. The reset output remains asserted for a certain period after the voltage returns to an acceptable level. This device requires minimal external components, simplifying the design process. The open-drain reset output allows for connection to microprocessors with active-low or active-high reset inputs using a pull-up resistor. The watchdog timer prevents software failures or lockups by resetting the microprocessor if it fails to provide a periodic signal. The MAX6807 family offers various voltage threshold options to suit different application requirements.