Maxim Integrated MAX6829YGUT+T Microprocessor Supervisory Circuit

The MAX6829YGUT+T is a highly compact, precision microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in µP and digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when monitoring nominal system voltages from 1.8V to 5V. This component is especially suitable for portable and space-constrained applications due to its tiny SOT23 package.

This supervisory circuit ensures that the µP is reset to a known state during power-up, power-down, or brown-out conditions. The reset output remains asserted for a minimum of 140ms after V_CC has risen above the reset threshold level, ensuring that the µP has sufficient time to stabilize and start-up correctly. The MAX6829YGUT+T features an active-low, push-pull reset output, which provides a direct interface to the reset pin of most popular microprocessors.

The device operates with a low supply current of only 6µA (typical), which is essential for battery-powered equipment. The low power consumption, along with its wide operating voltage range from 1.2V to 5.5V, makes it an ideal choice for a variety of applications including computers, controllers, intelligent instruments, critical µP power monitoring, and portable/battery-powered equipment.

Key features of the MAX6829YGUT+T include:

• Precision monitoring of 1.8V, 2.5V, 3V, 3.3V, and 5V power-supply voltages.
• Factory-trimmed reset threshold voltages for high accuracy.
• Low supply current of 6µA (typical) ideal for battery-powered applications.
• Minimum reset pulse width of 140ms to ensure system stability.
• Immune to short V_CC transients.
• Push-pull reset output for direct interfacing.
• Compact SOT23 packaging for space-saving.

Overall, the MAX6829YGUT+T supervisory circuit from Maxim Integrated is a reliable and efficient solution for system monitoring, providing the necessary protection for microprocessors by ensuring proper operation during power-up, power-down, and voltage dips. Its small size, low power consumption, and precision make it an excellent choice for designers looking to enhance system reliability in a variety of applications.