The MAX803SQ308T1G is a precision microprocessor (μP) reset circuit developed by ON Semiconductor, a leading supplier of semiconductor-based solutions. This compact and efficient device provides a highly reliable method for monitoring power supplies in digital systems. It is designed to assert a reset signal whenever the VCC supply voltage declines below a preset threshold, ensuring that the μP and other critical components in a system reset properly during power-up, power-down, or brown-out conditions.

The device features a factory-trimmed threshold voltage which ensures that systems powered by 3.08V are adequately protected. The MAX803SQ308T1G has an active-low reset output, which remains asserted for a minimum of 140ms after VCC has risen above the reset threshold level. This timeout ensures that the system has sufficient time to stabilize before the processor starts operating.

The MAX803SQ308T1G comes in a compact SOT-323 package, making it suitable for space-constrained applications. Its low power consumption and wide operating temperature range of -40°C to +85°C make it an excellent choice for portable, automotive, and industrial electronics where efficient power management is crucial.

Key features of the MAX803SQ308T1G include:

• Precision monitoring of 3.08V power supplies
• Factory-trimmed VCC reset threshold voltage
• 140ms minimum reset timeout period
• Low supply current of 4μA (typical)
• Active-low, open-drain RESET output
• Guaranteed RESET valid to VCC = 1.0V
• Immune to short VCC transients
• Compact SOT-323 package
• Operating temperature range: -40°C to +85°C

The MAX803SQ308T1G is ideal for applications requiring high reliability and extended operational life. Its precision voltage monitoring and reset capabilities make it an essential component for ensuring the proper functioning of microprocessor-based systems.