TPS3305 Series

Dual-processor voltage supervisor with watchdog timer

Catalog

Dual-processor voltage supervisor with watchdog timer

Part	Operating Temperature [Min]	Operating Temperature [Max]	Reset Timeout [Min]	Reset	Package / Case	Package / Case [custom]	Output	Supplier Device Package	Number of Voltages Monitored	Voltage - Threshold	Mounting Type	Type	Package / Case [y]	Package / Case [x]	Voltage - Threshold [Max]	Voltage - Threshold [Min]
Texas Instruments TPS3305-18DGNRG4	-40 °C	85 °C	140 ms	Active High/Active Low	8-MSOP 8-TSSOP Exposed Pad	0.118 in 3 mm	Push-Pull Totem Pole	8-HVSSOP	2	1.68 V 2.93 V	Surface Mount	Multi-Voltage Supervisor
Texas Instruments TPS3305-33DG4	-40 °C	85 °C	140 ms	Active High/Active Low	8-SOIC		Push-Pull Totem Pole	8-SOIC	2		Surface Mount	Multi-Voltage Supervisor	3.9 mm	0.154 in	4.55 V	2.93 V
Texas Instruments TPS3305-18DR	-40 °C	85 °C	140 ms	Active High/Active Low	8-SOIC		Push-Pull Totem Pole	8-SOIC	2	1.68 V 2.93 V	Surface Mount	Multi-Voltage Supervisor	3.9 mm	0.154 in
Texas Instruments TPS3305-18D	-40 °C	85 °C	140 ms	Active High/Active Low	8-SOIC		Push-Pull Totem Pole	8-SOIC	2	1.68 V 2.93 V	Surface Mount	Multi-Voltage Supervisor	3.9 mm	0.154 in
Texas Instruments TPS3305-25DGNR	-40 °C	85 °C	140 ms	Active High/Active Low	8-MSOP 8-TSSOP Exposed Pad	0.118 in 3 mm	Push-Pull Totem Pole	8-HVSSOP	2	2.25 V 2.93 V	Surface Mount	Multi-Voltage Supervisor
Texas Instruments TPS3305-33DR	-40 °C	85 °C	140 ms	Active High/Active Low	8-SOIC		Push-Pull Totem Pole	8-SOIC	2		Surface Mount	Multi-Voltage Supervisor	3.9 mm	0.154 in	4.55 V	2.93 V
Texas Instruments TPS3305-33DGNG4	-40 °C	85 °C	140 ms	Active High/Active Low	8-MSOP 8-TSSOP Exposed Pad	0.118 in 3 mm	Push-Pull Totem Pole	8-HVSSOP	2		Surface Mount	Multi-Voltage Supervisor			4.55 V	2.93 V
Texas Instruments TPS3305-33DGNRG4	-40 °C	85 °C	140 ms	Active High/Active Low	8-MSOP 8-TSSOP Exposed Pad	0.118 in 3 mm	Push-Pull Totem Pole	8-HVSSOP	2		Surface Mount	Multi-Voltage Supervisor			4.55 V	2.93 V
Texas Instruments TPS3305-33DGN	-40 °C	85 °C	140 ms	Active High/Active Low	8-MSOP 8-TSSOP Exposed Pad	0.118 in 3 mm	Push-Pull Totem Pole	8-HVSSOP	2		Surface Mount	Multi-Voltage Supervisor			4.55 V	2.93 V
Texas Instruments TPS3305-33DGNR	-40 °C	85 °C	140 ms	Active High/Active Low	8-MSOP 8-TSSOP Exposed Pad	0.118 in 3 mm	Push-Pull Totem Pole	8-HVSSOP	2		Surface Mount	Multi-Voltage Supervisor			4.55 V	2.93 V

Catalog

Dual-processor voltage supervisor with watchdog timer

Key Features

• Dual Supervisory Circuits for DSP- and Processor-Based SystemsPower-On Reset Generator with Fixed Delay Time of 200ms; no External Capacitor NeededWatchdog Timer Retriggers theRESETOutput at SENSEn ≥ VIT+Temperature-Compensated Voltage ReferenceMaximum Supply Current of 40µASupply Voltage Range: 2.7V to 6VDefinedRESETOutput From VDD≥ 1.1VMSOP-8 and SO-8 PackagesTemperature Range: -40°C to +85°CAPPLICATIONSProcessor Supply MonitoringIndustrial EquipmentAutomotive SystemsPortable/Battery-Powered EquipmentWireless Communication SystemsNotebook/Desktop ComputersDual Supervisory Circuits for DSP- and Processor-Based SystemsPower-On Reset Generator with Fixed Delay Time of 200ms; no External Capacitor NeededWatchdog Timer Retriggers theRESETOutput at SENSEn ≥ VIT+Temperature-Compensated Voltage ReferenceMaximum Supply Current of 40µASupply Voltage Range: 2.7V to 6VDefinedRESETOutput From VDD≥ 1.1VMSOP-8 and SO-8 PackagesTemperature Range: -40°C to +85°CAPPLICATIONSProcessor Supply MonitoringIndustrial EquipmentAutomotive SystemsPortable/Battery-Powered EquipmentWireless Communication SystemsNotebook/Desktop Computers

Description

The TPS3305 family is a series of micropower supply voltage supervisors designed for circuit initialization. Its dual monitor topology is well-suited to use in DSP and processor-based systems, which often require two supply voltages, core and I/O. RESETis asserted when the voltage at either SENSEn pin falls below its threshold voltage, VIT. When both SENSEn pins are again above their respective threshold voltages,RESETis held low for the factory-programmed delay time (200ms typ).RESETis also asserted if the watchdog input (WDI) is not toggled for more than 1.6s typ. The TPS3305-xx devices are available in either 8-pin MSOP or SO packages, and are specified for operation over a temperature range of -40°C to +85°C. The TPS3305 family is a series of micropower supply voltage supervisors designed for circuit initialization. Its dual monitor topology is well-suited to use in DSP and processor-based systems, which often require two supply voltages, core and I/O. RESETis asserted when the voltage at either SENSEn pin falls below its threshold voltage, VIT. When both SENSEn pins are again above their respective threshold voltages,RESETis held low for the factory-programmed delay time (200ms typ).RESETis also asserted if the watchdog input (WDI) is not toggled for more than 1.6s typ. The TPS3305-xx devices are available in either 8-pin MSOP or SO packages, and are specified for operation over a temperature range of -40°C to +85°C.