The TPS3809K33 from Texas Instruments is a high-precision voltage supervisor designed to monitor VCC in digital systems and provide a reset signal to the host processor when necessary. This device ensures that the system's microcontroller or processor operates only under adequate power supply conditions, thereby safeguarding the system from erratic behavior due to low voltage levels.

Key Features:

• Voltage Threshold: The TPS3809K33 has a fixed-sense threshold voltage of 3.3V, which is ideal for systems operating at this standard supply voltage.
• Low Current Consumption: With a typical quiescent current of only 9µA, this voltage supervisor is an energy-efficient solution for battery-powered applications.
• Reset Time Delay: It features a programmable time delay for the reset signal, providing flexibility to accommodate various system requirements.
• Manual Reset: A manual reset input is available, allowing the user to trigger a reset event as needed.
• Reset Output: The open-drain reset output ensures compatibility with a variety of logic levels and can be wire-connected to achieve an OR-tied configuration for multiple power supplies.
• Temperature Range: The device operates over a wide temperature range of -40°C to +85°C, making it suitable for industrial applications.

Applications:

The TPS3809K33 is versatile and can be used in a wide array of applications that require reliable voltage monitoring, including:

• Microcontrollers and digital systems
• Portable/battery-powered equipment
• Industrial controls
• Embedded systems
• Computing devices

Package and Availability:

The TPS3809K33 voltage supervisor is available in a small SOT-23 package, which is suitable for space-constrained applications. Texas Instruments provides comprehensive technical support and documentation, making integration into your system straightforward and efficient.