Product Overview: MAX690AMJA/883B from Maxim Integrated

The MAX690AMJA/883B is a highly reliable, precision microprocessor (µP) supervisory circuit designed by Maxim Integrated 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 systems.

This supervisory circuit significantly improves system consistency and accuracy over temperature, with a factory-trimmed reset threshold. It offers a reset output during power-up, power-down, and brownout conditions. The reset signal remains operational with VCC as low as 1V. The MAX690AMJA/883B also features a complementary Watchdog Timer that can be set by an external capacitor, which helps to ensure that the µP system functions correctly by monitoring the system activity and resetting the µP in case of malfunction.

The MAX690AMJA/883B comes in a hermetically sealed package, making it suitable for military and aerospace applications where reliability in harsh environments is critical. It is also fully compliant with the stringent requirements of the 883B military standards, ensuring performance and durability in extreme conditions.

Key features of the MAX690AMJA/883B include:

• 4.65V ±1% reset threshold voltage
• 200ms min power-on reset pulse width
• 1.3V to 5.5V operating voltage range
• Watchdog timer with a dedicated input
• Active-low RESET output
• Low supply current of 40µA
• Temperature range from -55°C to +125°C
• Hermetically sealed package for harsh environments

With these features, the MAX690AMJA/883B is particularly well-suited for use in critical systems that require constant monitoring and control of the power supply to ensure uninterrupted operation. It's an essential component for designers looking for a robust, reliable solution to enhance system integrity in applications that cannot tolerate any compromise in performance.