Maxim Integrated MAX692AESA+ Microprocessor Supervisory Circuit

The Maxim Integrated MAX692AESA+ is a compact, highly integrated microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in battery-powered applications. This supervisory circuit is ideal for use in a wide range of products, including computers, controllers, and intelligent instruments.

The MAX692AESA+ ensures that the µP is fully reset during power-up, power-down, and brown-out conditions. It also features a 1.25V threshold detector for power-fail warning, low-battery detection, or for monitoring a power supply other than +5V. The device’s reset output is guaranteed to be in the correct state for V_CC down to 1V. Additionally, the MAX692AESA+ includes a debounced manual reset input feature, allowing for a very flexible reset triggering.

One of the key benefits of the MAX692AESA+ is its small size. The device comes in a compact 8-pin SO package, making it suitable for space-constrained applications. It also provides a significant advantage in systems where reliability is critical, by supervising the system voltage and providing a reset signal to the CPU whenever necessary, thus preventing code execution errors during power fluctuations.

Specifications of the MAX692AESA+ include:

• Supply Voltage Range: 4.75V to 5.5V
• Operating Temperature: -40°C to +85°C
• Reset Threshold Voltage: Typically 4.65V
• Reset Timeout: Typically 200ms
• Watchdog Timer: 1.6s timeout (typical)
• Power-Fail Warning: 1.25V threshold detector

The device also features a low supply current of 40µA (typical), making it an energy-efficient choice for battery-powered applications. The MAX692AESA+ is a reliable and essential component for systems requiring robust power monitoring and control, ensuring that they operate safely within their specified voltage and power parameters.

Overall, the Maxim Integrated MAX692AESA+ provides a comprehensive solution for µP system stability and is an excellent choice for designers looking to enhance system reliability without incurring high costs or sacrificing board space.