Maxim Integrated MAX6861UK29+T Microprocessor Reset Circuit

The MAX6861UK29+T is a compact, high-precision microprocessor (µP) supervisory circuit designed by Maxim Integrated 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 2.9V power supply voltage. This device is particularly suitable for portable, battery-operated applications due to its low power consumption and small footprint.

Featuring a factory-trimmed reset threshold voltage of 2.925V, the MAX6861UK29+T ensures that systems powered by a 2.9V rail are accurately monitored. When the monitored voltage falls below the reset threshold, the reset output is asserted, which holds the connected µP in a reset state for a minimum of 140ms (reset timeout period) after the voltage rises above the threshold. This ensures that the µP has sufficient time to stabilize before resuming operation.

One of the standout features of the MAX6861UK29+T is its low quiescent current, which is typically only 1.6µA, making it an energy-efficient choice for power-sensitive designs. The device is available in a small SOT23 package, which is ideal for space-constrained applications.

The MAX6861UK29+T also includes a manual reset input that allows the user to trigger a system reset with an external push-button or logic signal. This feature provides an additional layer of control and security, allowing for system resets without the need for power cycling.

Key features of the MAX6861UK29+T include:

• Factory-trimmed V_CC reset threshold voltage: 2.925V
• Low quiescent current: 1.6µA (typ)
• Minimum reset timeout period: 140ms
• Manual reset input
• Immune to short V_CC transients
• Available in a small SOT23-5 package

Whether it's for handheld devices, consumer electronics, or any other system where power efficiency and reliability are paramount, the MAX6861UK29+T from Maxim Integrated is an excellent choice for supervisory circuit needs.