Maxim Integrated's MAX708SESA+ Microprocessor Supervisory Circuit

The MAX708SESA+ is a compact, highly efficient microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in µP and digital systems. It provides a significant level of protection to your system by ensuring that the µP and its peripherals are reset properly during power-up, power-down, and brown-out conditions. This supervisory circuit is an essential component for any system that requires reliable operation over a wide range of supply voltages and operating conditions.

The MAX708SESA+ supervisory circuit comes in a small 8-pin SOIC (Narrow) package, making it suitable for space-constrained applications. It is designed to maintain system integrity by monitoring the power supply voltage and asserting a reset signal to the µP whenever the supply voltage drops below a preset threshold. The reset signal remains asserted for a minimum timeout period after the supply voltage exceeds the reset threshold, ensuring the µP has adequate time to stabilize and start up correctly.

Key features of the MAX708SESA+ include:

• A precise factory-set reset threshold voltage, which helps to prevent false triggering and ensures reliable operation.
• A minimum power-on reset timeout of 200ms, providing ample time for the system to recover from power-up transients.
• A manual reset input, which allows for a system reset to be initiated by external hardware or software, offering additional flexibility and control.
• Low power consumption, making it an ideal choice for portable and battery-operated applications.
• Immunity to short VCC transients, ensuring stable operation even in environments with noisy power supplies.

The MAX708SESA+ operates over a wide voltage range of 1.0V to 5.5V and features an active-low reset output. It is designed to support a variety of µP systems, including those that run on 3V, 3.3V, and 5V power supplies. With its robust feature set, the MAX708SESA+ is the perfect solution for enhancing system reliability in microprocessor-based applications such as computers, controllers, intelligent instruments, and critical µP power monitoring.

By integrating the MAX708SESA+ into your design, you can ensure that your system will respond predictably under all power conditions, thereby protecting your data and hardware from unexpected power disruptions.