Maxim Integrated MAX6335US23D3+T Microprocessor Supervisory Circuit

The MAX6335US23D3+T from Maxim Integrated is a robust 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 with +2.5V, +3V, +3.3V, and +5V powered circuits.

This device performs a variety of functions necessary for system integrity, including resetting the microprocessor during power-up, power-down, and brownout conditions. The reset output is guaranteed to be in the correct state for V<sub>CC down to 1V. Additionally, the MAX6335US23D3+T features a debounced manual reset input, allowing for a manual triggering of the reset sequence.

The supervisory circuit has an active-low RESET output with an integrated watchdog timer that can be disabled if not required for a given application. The reset signal remains asserted for a minimum of 140ms after V<sub>CC has risen above the reset threshold level, ensuring that the system microprocessor has adequate time to initialize and stabilize.

One of the key advantages of the MAX6335US23D3+T is its low supply current draw, making it an excellent choice for portable and power-sensitive applications. With its small footprint, this device is available in a compact SOT-23 package, which is ideal for space-constrained applications.

Specifications of the MAX6335US23D3+T include:

• Precision Monitoring of +2.5V, +3V, +3.3V, and +5V Power-Supply Voltages
• Fully Specified Over Temperature
• Low Power Consumption
• 140ms min Power-On Reset Pulse Width
• Debounced Manual Reset Input
• Watchdog Timer with 1.6s Timeout (Disable Option Available)
• Guaranteed Reset Output Down to V<sub>CC = 1V
• Immune to Short V<sub>CC Transients
• Compact SOT-23 Package

Overall, the MAX6335US23D3+T is a reliable and efficient solution for system management in microprocessor-based systems. It ensures that the digital systems operate reliably within their voltage parameters and provides a safeguard against unexpected system failures due to power issues.