Maxim Integrated's MAX825REUK+T Microprocessor Supervisory Circuit

The MAX825REUK+T is a compact, highly reliable microprocessor (µP) supervisory circuit designed and manufactured by Maxim Integrated. This component is engineered to monitor power supplies in µP and digital systems, providing excellent circuit reliability and low cost by eliminating external components and adjustments when used in system monitoring applications.

This supervisory circuit is ideal for portable and space-constrained applications due to its small SOT-23 package. It offers a variety of features that make it a versatile choice for system designers. The MAX825REUK+T provides a precision voltage monitor with a 3.08V factory-set reset threshold voltage, ensuring that the µP is reset to a known state during power-up, power-down, and brownout conditions.

The device features a manual reset input that allows a pushbutton or an external signal to initiate system resets. Additionally, the MAX825REUK+T includes a 140ms minimum power-on reset pulse width which guarantees that the system microprocessor starts up correctly every time the power is turned on or restored.

Another notable feature of the MAX825REUK+T is its low supply current of 4µA (typical), making it an energy-efficient choice for battery-powered applications. The operating voltage range of 1.2V to 5.5V provides flexibility for use in various systems with different power levels.

The device also offers an active-low RESET output, which remains asserted for a minimum of 140ms after VCC has risen above the reset threshold level, ensuring proper system reset. The output is push-pull, which eliminates the need for an external pull-up resistor and further simplifies the design.

With its wide operating temperature range of -40°C to +85°C, the MAX825REUK+T is suitable for use in environments with varying temperature conditions. Its robust design and build quality adhere to Maxim Integrated's standards, ensuring long-term reliability and performance.

In summary, the MAX825REUK+T from Maxim Integrated is a feature-rich, easy-to-implement solution for system voltage monitoring and reset functions. Its compact form factor, low power consumption, and wide operating temperature range make it an excellent choice for designers who require a dependable supervisory circuit for their digital systems.