Maxim Integrated MAX705EUA+T Microprocessor Supervisory Circuit

The MAX705EUA+T from Maxim Integrated is a compact, highly efficient 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.

This supervisory circuit ensures that the µP is fully reset during power-up, power-down, and brownout conditions. It features a minimum power-on reset pulse width of 140ms, which guarantees that the system’s µP starts up in a known state every time the power is applied. Additionally, the MAX705EUA+T monitors the power supply voltage and maintains a reset output until the voltage reaches the stable operating level and then maintains the reset for at least 140ms after that.

With its wide operating temperature range of -40°C to +85°C, the MAX705EUA+T is suitable for a variety of challenging environments. The device is offered in an 8-pin µMAX package, which is ideal for space-constrained applications due to its small size.

Key features of the MAX705EUA+T include:

• Supply voltage monitoring to ensure stability.
• Manual reset input for additional system-level control.
• Watchdog timer to monitor microprocessor activity.
• 140ms min power-on reset pulse width.
• Active-low RESET output.
• Low supply current of 17µA (typical).
• Guaranteed RESET valid to VCC = 1V.

The device's combination of features makes it an excellent choice for use in systems that require a reliable reset function for microprocessors, such as computers, controllers, intelligent instruments, critical µP and µC power monitoring, and portable/battery-powered equipment.

Maxim Integrated's reputation for quality and reliability ensures that the MAX705EUA+T supervisory circuit is a dependable choice for maintaining system integrity and preventing data corruption during power failures or unexpected system behavior. Its integration into your design will contribute to the overall stability and robustness of your digital system.