Maxim Integrated MAX802TESA Microprocessor Supervisory Circuit

The Maxim Integrated MAX802TESA is a compact, highly integrated 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 significantly enhances system robustness by providing several key monitoring functions. It offers a precision voltage monitor that guards the system against undervoltage conditions, ensuring that the power supply is adequate for proper system operation. When the supply voltage drops below the preset threshold, the reset output is asserted, which resets the microprocessor, thus protecting the system from erratic behavior.

The MAX802TESA features a manual reset input that allows for a simple, user-initiated system reset. This is particularly useful for debugging and system maintenance operations. Additionally, the reset output remains operational with VCC as low as 1V, which is crucial for low voltage conditions.

Another important feature of the MAX802TESA is its power-on reset delay. After the supply voltage exceeds the reset threshold, the reset signal is kept active for a specified period, allowing the system's power supply and microprocessor to stabilize before the system startup commences. This delay is internally set, eliminating the need for external timing components.

The device comes in a space-saving 8-pin SOIC package, making it suitable for high-density circuit designs. The MAX802TESA operates over a wide temperature range, making it versatile for various applications, including computers, controllers, intelligent instruments, and critical µP power monitoring.

In summary, the Maxim Integrated MAX802TESA is an essential component for systems requiring reliable voltage monitoring and processor reset capabilities. Its integration of multiple supervisory functions into a single chip makes it an economical choice for safeguarding digital systems against power supply anomalies and ensuring proper system initialization and operation.