Maxim Integrated MAX6367PKA31 Microprocessor Supervisory Circuit

The Maxim Integrated MAX6367PKA31 is a highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies and microprocessor activity in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used with +3.3V-powered circuits.

This supervisory circuit ensures that the µP boots up in a predictable state by monitoring the power supply voltage. It asserts a reset signal to the µP during power-up, power-down, and brownout conditions. The reset output remains operational with VCC as low as 1.2V, which is essential for low voltage applications.

One of the key features of the MAX6367PKA31 is its ability to provide a reset signal to the µP for a minimum of 140ms after VCC has risen above the reset threshold. This ensures that the µP and its peripherals are fully operational before the system begins its functions. The device also includes a manual reset feature, allowing the system to be reset with an external push-button.

The MAX6367PKA31 comes in a small 8-pin SOT23 package, which is ideal for space-constrained applications. It has an operating temperature range of -40°C to +85°C, making it suitable for use in industrial environments. Additionally, the device features a low supply current of 17µA (typical), which is beneficial for portable and battery-powered applications where power efficiency is critical.

Moreover, this supervisory circuit includes a debounced manual reset input, which can be used to initiate a system reset. It also has an active-low reset output, which provides a guaranteed valid reset signal for VCC down to 1.2V. The MAX6367PKA31 is optimized for use in a variety of applications, including computers, controllers, intelligent instruments, critical µP and µC power monitoring, and portable/battery-powered equipment.

In summary, the Maxim Integrated MAX6367PKA31 is a versatile, low-power, and highly reliable supervisory circuit that enhances system stability and ensures proper operation under adverse power conditions. Its compact size, manual reset feature, and extended temperature range make it an excellent choice for a wide range of applications.