Maxim Integrated's MAX706SESA - Microprocessor Supervisory Circuit

The MAX706SESA from Maxim Integrated is a compact, 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.

This supervisory circuit significantly enhances system reliability by providing several key supervisory functions such as reset output during power-up, power-down, and brownout conditions. The MAX706SESA ensures that the µP is fully reset during power-up and operational for the duration of the power-down sequence. It also monitors the power supply voltage and keeps the µP in reset mode until the power supply voltage reaches a stable and precise factory-trimmed threshold value.

Key Features:

• Precision Monitoring: The MAX706SESA offers precision monitoring of +5V power-supply voltages and is fully specified over temperature.
• Reset Timeout: It features a 200ms (min) power-on reset pulse width, which ensures a proper system reset.
• Manual Reset Input: A manual reset input is provided, allowing for a very low standby current of only 12µA, which is ideal for power-conscious systems.
• Watchdog Timer: A watchdog timer is on-board with a 1.6s (typ) timeout period, providing an additional layer of system protection.
• Compact Package: The device is available in a small 8-pin SO package, making it suitable for space-constrained applications.

The MAX706SESA is ideal for use in microprocessor systems, computers, controllers, and intelligent instruments, where it can help to ensure correct operation during the event of voltage fluctuations or system errors. Its ability to provide a controlled system shutdown and restart ensures that the microprocessor will restart in a known state, which is critical for system recovery and the integrity of processes and data.

Overall, the MAX706SESA is a vital component for any system requiring a reliable and robust supervisory function to maintain the integrity and stable operation of the system's microprocessor and associated components.