The MAX705EESA from Maxim Integrated is a highly reliable, low-power microprocessor (µP) supervisory circuit designed to monitor power supplies and microprocessor activity in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in conjunction with 5V-powered circuits.

Key Features

• Supply Voltage Monitoring: The device ensures that the system's voltage levels are stable and within acceptable parameters. It monitors the supply voltage and keeps the system in reset during power-up, power-down, and brownout conditions.
• Power-On Reset (POR) Circuit: The MAX705EESA generates a reset signal whenever the supply voltage falls below a preset threshold, ensuring that the µP starts in a known state.
• Manual Reset Input: This feature allows for a manual reset, providing an additional layer of system control.
• Watchdog Timer: A built-in watchdog timer keeps the system running smoothly by resetting the µP if it fails to strobe within a preset time frame, indicating a system malfunction.
• Compact Package: Offered in an 8-pin SOIC package, it is suitable for space-constrained applications.

Applications

The MAX705EESA is well-suited for a variety of applications where reliable system operation is paramount. These include:

• Computers and Controllers
• Embedded Systems
• Portable/Battery-Powered Equipment
• Intelligent Instruments
• Critical µP Power Monitoring

Technical Specifications

The device operates over a wide voltage range and has a variety of features that make it an excellent choice for safeguarding digital systems:

• Reset Valid to V<sub>CC = 1V
• Low Supply Current of 17µA (Typical)
• Guaranteed Reset Valid to V<sub>CC = 1V
• 200ms Reset Pulse Width
• Adjustable Power-Fail Warning Voltage (MAX705)

For those looking to integrate robust power supply monitoring and system reliability into their designs, the MAX705EESA by Maxim Integrated is an ideal solution, offering both performance and ease of integration.