Maxim Integrated's MAX6746KA31/V Microprocessor Supervisory Circuit

The MAX6746KA31/V from Maxim Integrated is a highly reliable and compact microprocessor (µP) supervisory circuit designed 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 1.575V to 5V. This device is particularly well-suited for portable and battery-powered applications due to its low power consumption and small footprint.

The MAX6746KA31/V offers a precise factory-set V_CC reset threshold of 3.08V, ensuring that the µP is reset properly during power-up, power-down, and brownout conditions. The reset output remains asserted for a minimum of 140ms after V_CC rises above the reset threshold, providing ample time for the system to stabilize.

One of the key features of the MAX6746KA31/V is its capability to assert a reset signal if the manual reset (MR) input is pulled low. This manual reset function is edge-triggered, allowing for a brief assertion of the MR pin to generate a clean reset pulse. The device also includes a debounced MR input, which eliminates the need for external debounce circuitry.

The MAX6746KA31/V operates over a wide temperature range of -40°C to +125°C, making it versatile for various environments and applications. It is available in a compact 8-pin SOT23 package, which minimizes the space required on a printed circuit board (PCB).

With its low supply current of only 5.5µA (typical), the MAX6746KA31/V is energy-efficient, thus extending the battery life of portable devices. This supervisory circuit is ideal for use in systems that require a dependable reset signal to ensure proper operation, such as computers, controllers, intelligent instruments, and portable/battery-powered equipment.

In summary, Maxim Integrated's MAX6746KA31/V is a robust, low-power, and highly precise supervisory circuit that offers a simple and effective solution for system monitoring, ensuring that digital systems operate reliably and safely within their specified voltage ranges.