Maxim Integrated's MAX708RESA+T: Microprocessor Supervisory Circuit

The MAX708RESA+T from Maxim Integrated is a compact, highly reliable 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 in systems with +5V power supply voltage.

This supervisory circuit ensures that the µP is reset to a known state during power-up, power-down, or brown-out conditions. It also has a manual reset feature that allows for a very low voltage reset (V_CC = 1.0V) and an integrated watchdog timer to monitor the µP or microcontroller, which helps in preventing system failures due to software lock-up.

The MAX708RESA+T comes in a compact 8-pin SOIC package, making it suitable for space-constrained applications. Its key features include a reset timeout of 200ms, watchdog timeout of 1.6 seconds, and a supply voltage monitoring threshold preset at 4.65V, which is ideal for 5V-powered systems.

Additional features of the MAX708RESA+T include:

• Immunity to short V_CC transients
• Low power consumption (typically 17µA)
• Guaranteed reset valid to V_CC = 1V
• Debounced manual reset input
• Active-high and active-low reset outputs

The MAX708RESA+T is designed for use in a wide range of applications, including computers, controllers, intelligent instruments, critical µP and µC power monitoring, and portable/battery-powered equipment. Its robust feature set ensures that your system maintains operational integrity and stability through various power supply conditions.

Maxim Integrated's commitment to quality and reliability is evident in the MAX708RESA+T, making it an essential component for designers seeking to enhance system reliability without increasing complexity or cost.

Whether you are designing a new system or looking to improve an existing one, the MAX708RESA+T offers a simple and effective solution for your microprocessor supervisory needs.