The APX803L-33SA-7 is a highly precise voltage supervisor IC designed by Diodes Incorporated, engineered to maintain system integrity by monitoring the supply voltage of microprocessors (µP) and digital systems. It is an essential component for applications where reliable operation is critical under varying voltage conditions.

This micro-power device offers a nominal threshold voltage of 3.3V, making it well-suited for 3.3V powered systems. It provides a significant measure of protection by asserting a reset signal whenever the VCC voltage falls below the minimum VCC threshold. The reset signal remains asserted until the VCC voltage exceeds the minimum threshold voltage for a period longer than the minimum reset timeout period, ensuring a proper system reset and initialization.

The APX803L-33SA-7 comes in a compact, surface-mount SOT-23 package, which is ideal for space-constrained applications. It operates over a wide temperature range of -40°C to +85°C, offering reliable performance in diverse operating environments. Its low power consumption makes it a suitable choice for portable and battery-powered devices.

Key Features:

• Precision monitoring of 3.3V power supplies
• Low supply current of 20µA (typical) for energy-efficient operation
• Asserted reset output down to VCC = 1.0V
• Minimum power-on reset pulse width of 240ms ensures proper system reset
• Immunity to short VCC transients
• Operating temperature range: -40°C to +85°C
• RoHS compliant and lead-free for environmental consideration

Applications:

The APX803L-33SA-7 is versatile and can be used in a variety of applications, including:

• Microprocessor, microcontroller, and DSP power supply monitoring
• Portable and battery-powered equipment
• Intelligent instruments
• Notebook computers
• Medical and safety systems

With its precision voltage monitoring and low power consumption, the APX803L-33SA-7 is an optimal solution for safeguarding sensitive digital systems from the dangers of unexpected under-voltage conditions.