Maxim Integrated's MAX6703SKA Microprocessor Supervisory Circuit

The MAX6703SKA from Maxim Integrated is a highly reliable and compact microprocessor (µP) supervisory circuit designed 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 a variety of applications, including computers, controllers, and intelligent instruments.

This supervisory circuit ensures that the µP is reset to a known state during power-up, power-down, or brown-out conditions. The MAX6703SKA comes in a small 8-pin SOT23 package, making it ideal for space-constrained applications. It has a factory-trimmed reset threshold voltage, which allows the device to monitor 3V, 3.3V, and 5V power supplies.

The MAX6703SKA features an active-low RESET output, which remains asserted for a minimum timeout period of 140ms after V_CC has risen above the reset threshold. This ensures that the µP has adequate time to initialize and stabilize during power-up. Additionally, the device includes a manual reset input that allows the user to trigger a reset with an external pushbutton or logic signal.

Key features of the MAX6703SKA include:

• Factory-Trimmed V_CC Reset Threshold Voltage
• 140ms (min) Reset Timeout Period
• Debounced Manual Reset Input
• Low Supply Current of 5.5µA (typ)
• Immune to Short V_CC Transients
• Wide Operating Temperature Range: -40°C to +125°C
• Active-Low RESET Output

This supervisory circuit is suitable for battery-powered equipment due to its low power consumption. The low supply current feature is particularly important for portable devices, where prolonging battery life is crucial.

Maxim Integrated's MAX6703SKA offers a simple and effective solution for system monitoring, providing peace of mind for designers by ensuring system stability and reliability. With its precision voltage monitoring and compact footprint, the MAX6703SKA is an excellent choice for modern electronic systems requiring robust power management.