Maxim Integrated MAX806TCSA+T Microprocessor Supervisory Circuit

The MAX806TCSA+T is a highly reliable microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in µP and digital systems. It provides a significant level of system reliability and accuracy needed in critical applications where system failure is not an option. This supervisory circuit ensures that the µP is reset to a known state during power-up, power-down, or brown-out conditions.

This device features a combination of functions that make it an essential component for any system requiring robust power management. It includes a watchdog timer, manual reset capability, and a reset output. The watchdog timer helps to ensure that the system will recover from a software lock-up by resetting the µP if it does not receive a periodic signal indicating normal operation.

The MAX806TCSA+T offers a reset output that remains asserted for a minimum of 140ms after VCC has risen above the reset threshold level, providing ample time for the µP and other system components to stabilize. The manual reset function allows for a system reset to be triggered with an external switch or through software control, offering additional flexibility and control over the system's operation.

This device operates over a wide voltage range and features a low supply current, making it suitable for battery-operated applications. The MAX806TCSA+T is available in a compact 8-pin SO package, offering a space-saving solution for today's compact electronic assemblies.

Key features of the MAX806TCSA+T include:

• Precision monitoring of 3V, 3.3V, and 5V power-supply voltages
• Fully integrated watchdog timer
• Manual reset input with debounce
• 140ms min power-on reset pulse width
• Low supply current of 17µA (typical)
• Guaranteed reset valid to VCC = 1V
• Power supply transient immunity

With its combination of features, the MAX806TCSA+T is ideal for use in microprocessor-based systems, computers, controllers, and intelligent instruments where reliable system operation is critical. Maxim Integrated's commitment to quality ensures that this supervisory circuit will provide the necessary oversight to maintain system integrity under a variety of conditions.