The CAT813VI-G is a microprocessor supervisory circuit used to monitor voltage levels in microprocessor-based systems. It generates a reset signal when the supply voltage drops below a specified threshold, preventing the microcontroller from operating erratically or corrupting data during power-up, power-down, or brownout conditions. This supervisor ensures system stability and reliability by maintaining a proper reset state during abnormal voltage conditions.

Applications

• Microprocessor-based systems
• Embedded controllers
• Industrial automation equipment
• Automotive electronics
• Portable instrumentation

Features

• Precision voltage monitoring
• Active-low reset output
• Internal reset timeout period
• Low supply current
• No external components required
• Small SOT23 package
• Wide operating voltage range

Benefits

• Prevents code execution errors during low voltage conditions.
• Ensures reliable system start-up after power loss or brownout.
• Simplifies system design with minimal external components.
• Reduces board space requirements due to its small package size.
• Enhances system stability and data integrity.

The CAT813VI-G functions by constantly monitoring the supply voltage. When the voltage drops below the internally set threshold, the active-low reset output is asserted, holding the microprocessor in a reset state. Once the supply voltage rises above the threshold and remains stable for a predetermined timeout period, the reset output is deasserted, allowing the microprocessor to begin normal operation. This prevents the processor from executing incorrect code or accessing corrupted data. The internal reset timeout ensures that the power supply has stabilized before the microprocessor begins operation. The device's low supply current and small SOT23 package make it ideal for portable and space-constrained applications. It provides a cost-effective solution for voltage monitoring and reset generation.