Maxim Integrated MAX908CSD+T Microprocessor Supervisory Circuit

The Maxim Integrated MAX908CSD+T is a sophisticated microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides a crucial function by ensuring that the µP starts up in a known state and operates reliably. This compact and efficient component is an essential addition to any system requiring a high level of precision and reliability in its power management.

The MAX908CSD+T is adept at providing four key functions: a reset output during power-up, power-down, and brownout conditions; an independent watchdog timer that operates when the system goes astray; a 1.25V threshold detector for power-fail warning, low-battery detection, or to monitor a power supply other than +5V; and an active-high manual-reset input. These features collectively ensure that the system maintains integrity and prevents data corruption during adverse power conditions.

One of the standout features of the MAX908CSD+T is its ability to assert a reset signal whenever the VCC supply voltage falls below the reset voltage threshold, keeping the reset asserted for a minimum of 140ms after VCC rises above the reset threshold. This ensures that the µP and other critical components have enough time to stabilize for proper operation.

The device's watchdog timer is a significant asset, requiring a periodic signal from the µP within a preset timeout period. If the µP fails to restart the timer, the MAX908CSD+T assumes a system failure and issues a system reset, providing an additional layer of protection against system malfunctions.

With its small 14-pin SO package, the MAX908CSD+T is designed for space-constrained applications. Its low power consumption and wide operating voltage range from 4.5V to 5.5V make it suitable for a variety of systems, including computers, controllers, and intelligent instruments. Furthermore, its operating temperature range from -40°C to +85°C ensures reliable performance across diverse environmental conditions.

By integrating the MAX908CSD+T into your digital system, you can enhance system reliability, protect against data loss, and ensure a robust power management solution that safeguards the core operations of your electronics.