TPS3620 Series

Battery-backup supervisor for RAM retention with power fail input & manual reset

Catalog(6 parts)

Part	Type	Output	Package / Case	Package / Case▲▼	Package / Case▲▼	Number of Voltages Monitored▲▼	Operating Temperature▲▼	Operating Temperature▲▼	Reset	Voltage - Threshold▲▼	Mounting Type	Reset Timeout▲▼
Texas Instruments TPS3620-33DGKR Supervisor Push-Pull, Totem Pole 1 Channel 8-VSSOP	Battery Backup Circuit	Push-Pull, Totem Pole	8-MSOP, 8-TSSOP	0.0029972000047564507 m	0.003000000026077032 m	1 ul	85 °C	-40 °C	Active Low	2.930000066757202 V	Surface Mount	0.05999999865889549 s
Texas Instruments TPS3620-33MDGKTEP Supervisor Push-Pull, Totem Pole 1 Channel 8-VSSOP	Battery Backup Circuit	Push-Pull, Totem Pole	8-MSOP, 8-TSSOP	0.0029972000047564507 m	0.003000000026077032 m	1 ul	125 °C	-55 °C	Active Low	2.930000066757202 V	Surface Mount	0.05999999865889549 s
Texas Instruments TPS3620-50DGKR Supervisor Push-Pull, Totem Pole 1 Channel 8-VSSOP	Battery Backup Circuit	Push-Pull, Totem Pole	8-MSOP, 8-TSSOP	0.0029972000047564507 m	0.003000000026077032 m	1 ul	85 °C	-40 °C	Active Low	4.550000190734863 V	Surface Mount	0.05999999865889549 s
Texas Instruments TPS3620-50DGKT Supervisor Push-Pull, Totem Pole 1 Channel 8-VSSOP	Battery Backup Circuit	Push-Pull, Totem Pole	8-MSOP, 8-TSSOP	0.0029972000047564507 m	0.003000000026077032 m	1 ul	85 °C	-40 °C	Active Low	4.550000190734863 V	Surface Mount	0.05999999865889549 s
Texas Instruments TPS3620-33DGKT Supervisor Push-Pull, Totem Pole 1 Channel 8-VSSOP	Battery Backup Circuit	Push-Pull, Totem Pole	8-MSOP, 8-TSSOP	0.0029972000047564507 m	0.003000000026077032 m	1 ul	85 °C	-40 °C	Active Low	2.930000066757202 V	Surface Mount	0.05999999865889549 s
Texas Instruments TPS3620-33MDGKREP Supervisor Push-Pull, Totem Pole 1 Channel 8-VSSOP	Battery Backup Circuit	Push-Pull, Totem Pole	8-MSOP, 8-TSSOP	0.0029972000047564507 m	0.003000000026077032 m	1 ul	125 °C	-55 °C	Active Low	2.930000066757202 V	Surface Mount	0.05999999865889549 s

Key Features

• Supply Current of 40 µA (Max)Battery-Supply Current of 100 nA (Max)Precision Supply Voltage Monitor 3.3 V, 5 V, Other Options on RequestBackup-Battery Voltage Can Exceed VDDPower On Reset Generator With Fixed 100-ms Reset Delay TimeVoltage Monitor For Power-Fail or Low-Battery MonitoringBattery Freshness Seal (TPS3619)Pin-For-Pin Compatible With MAX819, MAX703, and MAX7048-Pin MSOP PackageTemperature Range –40°C to +85°CAPPLICATIONSFax MachinesSet-Top BoxesAdvanced Voice Mail SystemsPortable Battery-Powered EquipmentComputer EquipmentAdvanced ModemsAutomotive SystemsPortable Long-Time Monitoring EquipmentPoint-of-Sale EquipmentAll other trademarks are the property of their respective ownersSupply Current of 40 µA (Max)Battery-Supply Current of 100 nA (Max)Precision Supply Voltage Monitor 3.3 V, 5 V, Other Options on RequestBackup-Battery Voltage Can Exceed VDDPower On Reset Generator With Fixed 100-ms Reset Delay TimeVoltage Monitor For Power-Fail or Low-Battery MonitoringBattery Freshness Seal (TPS3619)Pin-For-Pin Compatible With MAX819, MAX703, and MAX7048-Pin MSOP PackageTemperature Range –40°C to +85°CAPPLICATIONSFax MachinesSet-Top BoxesAdvanced Voice Mail SystemsPortable Battery-Powered EquipmentComputer EquipmentAdvanced ModemsAutomotive SystemsPortable Long-Time Monitoring EquipmentPoint-of-Sale EquipmentAll other trademarks are the property of their respective owners

Description

The TPS3619 and TPS3620 families of supervisory circuits monitor and control processor activity by providing backup-battery switchover for data retention of CMOS RAM. During power on,RESETis asserted when the supply voltage (VDDor VBAT) becomes higher than 1.1 V. Thereafter, the supply voltage supervisor monitors VDDand keepsRESEToutput active as long as VDDremains below the threshold voltage (VIT). An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time starts after VDDhas risen above VIT. When the supply voltage drops below VIT,the output becomes active (low) again. The product spectrum is designed for supply voltages of 3.3 V and 5 V. The TPS3619 and TPS3620 are available in an 8-pin MSOP package and are characterized for operation over a temperature range of–40°C to +85°C. The TPS3619 and TPS3620 families of supervisory circuits monitor and control processor activity by providing backup-battery switchover for data retention of CMOS RAM. During power on,RESETis asserted when the supply voltage (VDDor VBAT) becomes higher than 1.1 V. Thereafter, the supply voltage supervisor monitors VDDand keepsRESEToutput active as long as VDDremains below the threshold voltage (VIT). An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time starts after VDDhas risen above VIT. When the supply voltage drops below VIT,the output becomes active (low) again. The product spectrum is designed for supply voltages of 3.3 V and 5 V. The TPS3619 and TPS3620 are available in an 8-pin MSOP package and are characterized for operation over a temperature range of–40°C to +85°C.