Maxim Integrated MAX6314US28D4+T Microprocessor Reset Circuit

The MAX6314US28D4+T is a high-quality microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides a significant level of system reliability and accuracy required for managing microprocessor reset functions. This compact device ensures that the µP and its peripherals are reset properly during a power failure or whenever the voltage level drops below a predetermined threshold, safeguarding the system against data corruption and erratic operation.

This supervisory circuit is particularly suitable for portable and battery-powered equipment due to its low power consumption. The MAX6314US28D4+T operates over a wide voltage range and features a factory-trimmed reset threshold level of 2.8V, catering to systems that run on 3.3V power supplies. The reset output remains asserted for a minimum of 140ms after V<sub>CC has risen above the reset threshold level, providing ample time for the system to stabilize upon power-up.

The device comes in a compact, 4-pin SOT-143 package, making it an ideal choice for space-constrained applications. Its temperature range of -40°C to +85°C allows for operation in diverse environmental conditions. Additionally, the MAX6314US28D4+T features an active-low, push-pull reset output, which provides a direct drive to a µP reset or chip-enable input, eliminating the need for an external pull-up resistor.

Key features of the MAX6314US28D4+T include:

• Factory-trimmed V<sub>CC reset threshold voltage of 2.8V
• Low supply current of 1.2µA (typical), ideal for battery-powered applications
• Guaranteed reset valid to V<sub>CC = 1V
• 140ms (min) reset pulse width
• Immune to short V<sub>CC transients
• No external components required
• Compact SOT-143 package
• Temperature range of -40°C to +85°C

With its precise voltage monitoring and low power consumption, the MAX6314US28D4+T is an excellent choice for critical system monitoring applications that require a reliable reset mechanism. Maxim Integrated's commitment to quality ensures that this reset circuit will maintain system integrity and extend the life of the end product.