MAX705ESA

The MAX705ESA by Analog Devices is a microprocessor supervisory circuit designed to reduce the complexity and number of components required for monitoring power-supply and battery functions in microprocessor systems. This IC significantly improves system reliability and accuracy compared to discrete components.

Key functions include a reset output during power-up, power-down, and brownout conditions, an independent watchdog output that triggers if the watchdog input is not toggled within 1.6 seconds, a 1.25V threshold detector for power-fail or low-battery warnings, and an active-low manual-reset input. The MAX705ESA specifically generates a reset pulse when the supply voltage drops below 4.65V.

This device is ideal for applications such as computers, controllers, and intelligent instruments requiring critical µP power monitoring. Its supervisory-function integration helps improve system reliability while reducing board space. The MAX705ESA is available in an 8-SOIC package, suitable for surface mount applications.

Benefits include guaranteed RESET valid at VCC = 1V, a 200ms reset pulse width, and a debounced TTL/CMOS-compatible manual-reset input. The precision supply voltage monitor at 4.65V and the voltage monitor for power-fail or low-battery warning make it a versatile component for robust system design.