Maxim Integrated MAX6811SEUS-T Single/Dual Low-Voltage, Low-Power µP Reset Circuits

The MAX6811SEUS-T from Maxim Integrated is a highly compact, single-supply, low-power microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems with a single 2.5V to 5.5V power supply voltage.

This device is ideal for portable and battery-powered equipment due to its low power consumption and small size. The MAX6811SEUS-T comes in a space-saving 4-pin SOT143 surface-mount package, which is not only practical for modern compact designs but also helps in reducing the overall PCB footprint.

One of the key features of the MAX6811SEUS-T is its ability to assert a reset signal whenever the VCC supply voltage declines below a preset threshold, ensuring that the µP powers up in a known state. The reset output remains asserted for a minimum timeout period after VCC has risen above the reset threshold level, providing the system with a stable interval to initialize.

The device includes a debounced manual reset input that allows for a system reset to be initiated with an external pushbutton. Additionally, the MAX6811SEUS-T has an open-drain RESET output, which can be used to interface with other logic or to daisy-chain several MAX6811SEUS-T devices for more complex system monitoring.

Key specifications of the MAX6811SEUS-T include:

• Supply Voltage Range: 2.5V to 5.5V
• Quiescent Supply Current: 1µA (typical)
• Reset Threshold Options: Factory-trimmed for 2.32V, 2.63V, 2.93V, 3.08V, 4.38V, or 4.63V
• Reset Timeout Period: 140ms (min)
• Operating Temperature Range: -40°C to +85°C
• Packaging: 4-Pin SOT143

Overall, the MAX6811SEUS-T is an essential component for any design requiring high reliability and robust power supply monitoring, especially in applications where space and power are at a premium. Its ease of integration and the assurance it provides in maintaining system integrity make it a go-to choice for designers looking to enhance the operational stability of their digital systems.