The CAT809LTBI-T is a microprocessor reset circuit or voltage supervisor manufactured by Catalyst Semiconductor. This device monitors the power supply voltage of a microcontroller or microprocessor and asserts a reset signal if the voltage drops below a certain threshold. The 'T' likely indicates a specific voltage threshold. The CAT809LTBI-T is designed to ensure that the microcontroller starts up correctly and avoids erroneous operation during brownout conditions.

Applications

• Microcontroller systems: Power supply monitoring and reset generation for microcontrollers.
• Embedded systems: Voltage supervision and reset control in various embedded applications.
• Industrial controls: Ensuring proper operation of microprocessors in industrial control systems.
• Automotive electronics: Power supply monitoring and reset generation in automotive control units.
• Consumer electronics: Reset control in devices such as TVs, set-top boxes, and audio equipment.

Features

• Precision voltage monitoring: Monitors the power supply voltage with high accuracy.
• Reset output: Generates a reset signal when the voltage drops below the threshold.
• Active-low reset: The reset output is active low, meaning it is asserted low when a reset condition occurs.
• Open-drain output: The reset output is open-drain, allowing for easy connection to microcontrollers.
• Small package: Available in small surface-mount packages.
• Low power consumption: Minimizes power consumption.

Benefits

• Ensures proper startup: Prevents the microcontroller from running with insufficient voltage.
• Protects against data corruption: Prevents data corruption during brownout conditions.
• Simplifies system design: Eliminates the need for external reset circuitry.
• Reliable operation: Provides a reliable and robust solution for voltage monitoring and reset generation.
• Cost-effective: Offers a cost-effective solution for power supply supervision.

Additional Details

The CAT809LTBI-T monitors the power supply voltage and asserts a reset signal if the voltage drops below a pre-defined threshold. The reset output remains asserted until the voltage rises above the threshold plus a hysteresis voltage. This hysteresis prevents the reset signal from oscillating when the voltage is near the threshold. The device is typically available in SOT-23 or similar small surface-mount packages. It is a common and essential component for ensuring the reliable operation of microcontroller-based systems.