The MAX809-2.93 from Maxim Integrated is a compact, highly reliable voltage supervisor device designed to monitor power supplies in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used for system voltage monitoring.

This voltage supervisor is tailored to maintain system integrity by monitoring the supply voltage and keeping it within the acceptable operating range. The MAX809-2.93 asserts a reset signal whenever the V<sub>CC supply voltage falls below the 2.93V (typical) factory-set reset threshold. The reset output remains asserted for a period after V<sub>CC has risen above the reset threshold, ensuring the system has sufficient time to stabilize.

The device features a precision temperature-compensated voltage reference and comparator circuit to monitor the status of the power supply V<sub>CC. When V<sub>CC falls below the threshold voltage, the reset output is driven active (low) to signal that the system is not within the specified operating range. After V<sub>CC rises above the threshold, the reset signal is kept active for approximately 140ms (minimum) to ensure proper system reset. This timeout period allows the power supply and processor to stabilize before the system resumes operation.

The MAX809-2.93 is available in a variety of packages including the SOT23 and SC70, making it suitable for use in applications with limited space. Its low power consumption and wide operating voltage range make it an ideal choice for portable and battery-operated equipment.

Key features of the MAX809-2.93 include:

• Factory preset reset threshold voltage: 2.93V
• Reset timeout period: 140ms (min)
• Low supply current: 17μA (typ)
• Wide operating voltage range
• Immune to short V<sub>CC transients
• Available in small SOT23 and SC70 packages

Ideal for use in microcontrollers, computers, controllers, and intelligent instruments, the MAX809-2.93 from Maxim Integrated is an essential component for maintaining system stability and preventing data corruption during power supply fluctuations.