Maxim Integrated MAX6746KA31 Low-Power Microprocessor Supervisory Circuit

The MAX6746KA31 from Maxim Integrated is a compact, highly reliable supervisory circuit designed to monitor power supplies in microprocessor (µP) and digital systems. It provides a precise, low-power solution for system monitoring, ensuring that your devices operate within safe voltage levels. This supervisory IC is particularly suitable for portable and battery-powered equipment due to its low power consumption and small form factor.

The MAX6746KA31 offers a variety of features that make it an essential component for system stability and data integrity. One of the key features is its ability to provide a reset signal to the µP during power-up, power-down, and brownout conditions. The reset output remains asserted for a preset timeout period after V_CC has risen above the reset threshold, ensuring that the µP is held in reset until conditions have stabilized.

This device includes a factory-trimmed reset threshold voltage, which is preset to 3.1V, tailored for 3.3V-powered systems. It also boasts a low supply current of only 5.5µA, which is critical for power-sensitive applications. The MAX6746KA31 operates over a wide supply voltage range, from 1.2V to 5.5V, providing versatility across different system requirements.

For enhanced reliability, the MAX6746KA31 features an active-low, push-pull reset output. This type of output ensures that the reset signal remains in a defined state even when the IC is not powered, unlike open-drain outputs that require an external pull-up resistor.

The device is available in a small, 8-pin SOT23 package, making it an ideal choice for space-constrained applications. Its extended temperature range of -40°C to +125°C allows for operation in environments with extreme temperature variations.

In summary, the Maxim Integrated MAX6746KA31 is a robust supervisory circuit that offers crucial protection for microprocessor systems by monitoring supply voltages and providing reset signals during abnormal conditions. Its low power consumption, small footprint, and wide operating temperature range make it a versatile choice for a broad array of applications.