TPS3306-33D Supervisory Circuit

The TPS3306-33D is a high-precision supervisory circuit designed by Texas Instruments to monitor power supplies in digital systems. It provides crucial system protection by ensuring that the power supply remains within acceptable operating limits. This device is particularly well-suited for battery-powered equipment, portable devices, and microprocessor/microcontroller systems where maintaining the correct operation voltage is critical.

The TPS3306-33D supervisory circuit features a fixed-sense threshold voltage of 3.3V, which is tailored for systems that operate at this specific nominal voltage. It offers a dual, over-temperature-compensated reference circuit that enables the monitoring of two independent supply voltages, ensuring that both remain within specified thresholds. This dual monitoring capability makes it an excellent choice for complex systems with multiple power domains.

One of the key features of the TPS3306-33D is its low supply current, which is particularly beneficial for power-sensitive applications. The device also includes a manual reset input, allowing designers to incorporate a push-button reset feature into their systems. The reset output is available in both active-low and active-high configurations, providing flexibility in interfacing with other components of the system.

Additionally, the TPS3306-33D offers a Watchdog Timer function, which can be used to monitor microprocessor activity and initiate a system reset if necessary. This feature is crucial for applications where system reliability and recovery from fault conditions are important.

The device is available in an 8-pin small outline integrated circuit (SOIC) package, making it easy to integrate into space-constrained designs. With its wide operating temperature range and robust feature set, the TPS3306-33D is an excellent choice for ensuring system stability and reliability in a wide array of electronic applications.