Maxim Integrated MAX706ESA Microprocessor Supervisory Circuits

The MAX706ESA from Maxim Integrated is a compact, highly efficient microprocessor (µP) supervisory circuit designed to monitor power supplies and µP activity in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used with 5V-powered circuits.

This supervisory circuit features a combination of functions that make it ideal for microprocessor systems management. It includes a reset output during power-up, power-down, and brownout conditions. The reset signal remains asserted for a minimum of 140ms after Vcc has risen above the reset threshold level, ensuring that the µP is held in reset until the power supply is stable.

The MAX706ESA comes in a space-saving 8-pin SOIC package, making it suitable for high-density system applications. Its precise Vcc monitoring feature prevents code execution errors during power-up, power-down, and brownout conditions. The circuit also includes a manual reset input that allows the user to trigger a system reset with an external pushbutton or logic signal.

Other key features of the MAX706ESA include a watchdog timer that periodically checks for proper µP operation. If the µP fails to provide a watchdog transition within a preset timeout period, the MAX706ESA generates a system reset. Additionally, the circuit offers a 1.25V threshold detector for power-fail warning, low-battery detection, or to monitor a power supply other than +5V.

The MAX706ESA operates over a wide temperature range, making it suitable for various industrial and commercial applications. It is a reliable choice for systems that require maximum uptime and protection against faulty power supplies or erratic µP behavior.

In summary, the MAX706ESA from Maxim Integrated is a feature-rich, easy-to-use supervisory circuit that ensures the safe operation of µP systems by providing power monitoring, reset functions, and watchdog capabilities, all in a compact package.