Maxim Integrated MAX6705TKA-T Microprocessor Supervisory Circuit

The MAX6705TKA-T from Maxim Integrated is a highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies and µP activity in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems that require voltage monitoring and processor supervision.

This device performs a dual function: it asserts a reset signal whenever the VCC supply voltage declines below a preset threshold, ensuring that the µP starts up in a known state, and it monitors the µP to prevent code execution errors during power-up, power-down, and brownout conditions. The reset signal remains asserted for a preset timeout period after VCC has risen above the reset threshold level, providing the system with a stable interval to recover from a low voltage condition.

The MAX6705TKA-T features an active-low RESET output, with the output stage being push-pull, which eliminates the need for an external pull-up resistor. This characteristic simplifies the design and reduces component count. The reset threshold voltage is factory-trimmed to ensure high accuracy without the need for external adjustments. The device operates over a wide supply voltage range, making it suitable for a variety of applications.

Designed in a compact SOT-23 package, the MAX6705TKA-T is ideal for space-constrained applications. Its low power consumption makes it suitable for battery-operated devices. The operating temperature range of -40°C to +125°C ensures reliable performance in harsh environments.

Key features of the MAX6705TKA-T include:

• Precision factory-set VCC reset thresholds
• 150ms min power-on reset timeout (typ)
• Low supply current of 17µA (typ)
• Wide operating voltage range
• Compact SOT-23 package

Overall, the MAX6705TKA-T is an excellent choice for managing power supply and processor supervision in microprocessor-based systems, offering a combination of reliability, precision, and ease of integration.