Maxim Integrated MAX707CSA-T Microprocessor Supervisory Circuit

The MAX707CSA-T from Maxim Integrated is a highly reliable and efficient microprocessor (µP) supervisory circuit designed to monitor power supplies and microprocessor 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 circuits.

This supervisory circuit is particularly engineered to maintain system integrity and prevent data corruption during power failures or transient conditions. It achieves this by providing functions such as reset output during power-up, power-down, and brownout conditions. The reset signal remains asserted for a minimum of 140ms after VCC has risen above the reset threshold level, ensuring that the µP is fully reset and ready to operate correctly when power is stable.

The MAX707CSA-T variant comes in an 8-pin SO package, making it compact and easy to integrate into system designs. Its temperature range extends from 0°C to +70°C, which makes it suitable for commercial applications.

Key features of the MAX707CSA-T include:

• Power-supply monitoring for +5V systems
• 140ms (min) reset pulse width to ensure proper system reset
• Manual reset input for system troubleshooting
• Watchdog timer for system reliability enhancement
• Debounced TTL/CMOS-compatible manual-reset input
• Low supply current of 17µA (typical) for power conservation

Applications for this supervisory circuit are diverse, and it is ideal for use in:

• Computers and controllers
• Embedded systems
• Data storage equipment
• Portable/battery-powered equipment

The MAX707CSA-T is a testament to Maxim Integrated's commitment to providing solutions that enhance the performance and reliability of electronic systems. With its combination of features, it is a go-to component for designers looking to ensure robust power management and system integrity in their digital applications.