Maxim Integrated MAX693EWE Microprocessor Supervisory Circuit

The Maxim Integrated MAX693EWE is a sophisticated 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 conjunction with +5V-powered µPs.

This versatile device incorporates a variety of features to ensure that your microprocessor system runs smoothly. One of the key components is the reset output, which guarantees that the µP starts in a known state. It asserts a reset to the µP during power-up, power-down, and brownout conditions. The reset remains operational with VCC as low as 1V.

In addition to the reset function, the MAX693EWE includes a watchdog timer that can be set by an external capacitor. This timer keeps an eye on your µP, ensuring it's operating correctly. If the µP fails to strobe the watchdog within a preset time frame, the MAX693EWE will issue a system reset as a response.

Battery backup switching is another feature that makes the MAX693EWE a great choice for critical system applications. It automatically switches to a backup battery when the main power supply fails, ensuring data integrity and uninterrupted operation.

The MAX693EWE also offers a chip-enable gating function that can extend battery life in portable equipment. Furthermore, it has a power-fail input to warn the µP of impending power failure, allowing it to execute shutdown routines.

Encased in a 16-pin SOP (Small Outline Package), this integrated circuit is designed for space-constrained applications. Its temperature range of 0°C to +70°C allows for operation in most environmental conditions typically encountered by commercial-grade electronics.

Overall, the Maxim Integrated MAX693EWE is a reliable, feature-rich solution for managing µP systems. Its combination of reset logic, watchdog timer, battery backup, and power monitoring functions make it an essential component for ensuring the stable operation of µP-driven applications.