Diodes Incorporated APX803L20-18C3-7 Microprocessor Reset Circuit

The APX803L20-18C3-7 is a highly precise microprocessor supervisory circuit designed by Diodes Incorporated to monitor the power supplies in microprocessor and digital systems. It provides a significant level of protection against low-voltage conditions, ensuring that the system operates reliably over a wide range of input voltages and temperatures.

This compact device is a crucial component for maintaining system integrity and preventing data corruption during power failures or unexpected power-down events. The APX803L20-18C3-7 asserts a reset signal whenever the VCC supply voltage drops below the factory programmed threshold of 1.8V. The reset signal remains asserted for a minimum of 200ms after VCC has risen above the reset threshold voltage, providing ample time for the system to stabilize.

The APX803L20-18C3-7 comes in a small SOT-23 package, making it ideal for space-constrained applications. Despite its diminutive size, it does not compromise on performance, featuring low power consumption and a wide operating temperature range from -40°C to +85°C, which makes it suitable for use in a variety of harsh environments.

Key features of the APX803L20-18C3-7 include:

• High precision voltage monitoring
• Factory-programmed threshold voltage of 1.8V
• Minimum 200ms reset signal delay
• Low supply current of 10µA (typical)
• Wide operating temperature range (-40°C to +85°C)
• Push-pull active-low reset output
• Compact SOT-23 package

Applications for the APX803L20-18C3-7 include a wide array of products that require reliable voltage monitoring, such as:

• Microprocessor and microcontroller systems
• Portable and battery-powered equipment
• Industrial controllers
• Notebook computers
• Embedded systems

With its combination of features, the APX803L20-18C3-7 from Diodes Incorporated is an excellent choice for designers looking to enhance the reliability and performance of their digital systems. By integrating this reset circuit, developers can ensure that their applications remain operational and protected against the dangers of undervoltage conditions.