Maxim Integrated MAX794ESE+ Microprocessor Supervisory Circuit

The MAX794ESE+ is a state-of-the-art microprocessor (µP) supervisory circuit designed and manufactured by Maxim Integrated, a leader in analog and mixed-signal engineering. This compact and highly reliable component is engineered to monitor power supplies in µP and digital systems, providing excellent circuit protection and ensuring system integrity.

This supervisory IC is particularly designed to maintain system stability by monitoring the power supply voltage. In the event of a power failure or an unacceptable voltage drop, the MAX794ESE+ quickly reacts by asserting a reset signal, which resets the connected microprocessor. The reset signal remains asserted for a minimum of 200ms after the voltage level has returned to an acceptable range, ensuring that the µP and system have ample time to return to a stable operating condition.

The device comes in a narrow SO package, specifically the 16-pin SOIC (0.15", 3.9mm Width) form factor, making it suitable for space-constrained applications. Its operating temperature range of -40°C to +85°C allows it to function reliably in a wide range of environments, from industrial to commercial settings.

Key features of the MAX794ESE+ include:

• Precision monitoring of +5V, +3.3V, and adjustable voltage supplies
• 200ms (min) reset timeout period
• Manual reset capability
• Low supply current of 40µA (typical)
• Battery backup power-switching support
• Independent watchdog timer with 1.6s (typ) timeout
• Debounced TTL/CMOS-compatible manual-reset input

This device is ideal for use in systems that cannot tolerate even a momentary loss of power or those that require a dependable watchdog timer. The MAX794ESE+ is commonly used in applications such as computers, controllers, intelligent instruments, critical µP power monitoring, and portable/battery-powered equipment.

Maxim Integrated's commitment to quality ensures that the MAX794ESE+ provides the necessary features to safeguard your critical system operations against power supply anomalies, making it a smart choice for designers looking to enhance system reliability and performance.