The TPS3307 family is a series of micropower supply voltage supervisors designed for circuit initialization primarily in DSP and processor-based systems, which require more than one supply voltage.

The product spectrum of the TPS3307-xx is designed for monitoring three independent supply voltages: 3.3V/1.8V/adj, 3.3V/2.5V/adj or 3.3V/5V/adj. The adjustable SENSE input allows the monitoring of any supply voltage >1.25V.

The various supply voltage supervisors are designed to monitor the nominal supply voltage.

During power-on, RESET is asserted when the supply voltage V_DD becomes higher than 1.1V. Thereafter, the supply voltage supervisor monitors the SENSEn inputs and keeps RESET active as long as SENSEn remain below the threshold voltage V_IT+.

An internal timer delays the return of the RESET output to the inactive state (high) to ensure proper system reset. The delay time, t_{d (typ)} = 200ms, starts after all SENSEn inputs have risen above the threshold voltage V_IT+. When the voltage at any SENSE input drops below the threshold voltage V_IT-, the RESET output becomes active (low) again.

The TPS3307-xx family of devices incorporates a manual reset input, MR. A low level at MR causes RESET to become active. In addition to the active-low RESET output, the TPS3307-xx family includes an active-high RESET output.

The devices are available in either 8-pin MSOP or standard 8-pin SO packages.

The TPS3307-xx devices are characterized for operation over a temperature range of -40°C to +85°C.