Maxim Integrated MAX812LEUS-T Microprocessor Reset Circuit

The MAX812LEUS-T is a compact, highly efficient microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides a significant level of protection to ensure that the µP and its associated hardware operate reliably. This is particularly important in systems that require a stable and accurate reset operation for proper start-up and operation.

This device is specifically engineered to assert a reset signal whenever the VCC supply voltage declines below a preset threshold, ensuring that the µP resets cleanly during power-up, power-down, and brownout conditions. The reset signal remains asserted for a minimum of 140ms after VCC has risen above the reset threshold level, allowing the power supply and processor to stabilize before operation resumes.

The MAX812LEUS-T comes in a 4-pin SOT-143 package, which is ideal for space-constrained applications. Its small size, combined with its low power consumption, makes it an excellent choice for portable and battery-operated devices. The device operates over a wide voltage range, making it versatile for various applications and compatible with numerous microprocessors and microcontrollers.

Key features of the MAX812LEUS-T include:

• Immune to short VCC transients
• Low power consumption
• Precision monitoring of 3V, 3.3V, and 5V power-supply voltages
• 140ms (min) reset pulse width
• Available in a small SOT-143 package

Applications for the MAX812LEUS-T are diverse and include portable devices, computers, embedded systems, and other electronic products that require a reliable reset mechanism. Its robust design ensures that it can handle the harsh conditions often found in industrial and automotive environments.

Maxim Integrated is known for its high-quality and reliable integrated circuits, and the MAX812LEUS-T is no exception. With its precise voltage monitoring capabilities and extended temperature range, it stands out as a dependable component for maintaining system integrity through all sorts of power fluctuations and interruptions.