Supervisor Push-Pull, Totem Pole 1 Channel 8-VSSOP

The TPS3617 and TPS3618 are battery-backup supervisors that monitor 5 V supplies. They provide a battery-backup function ideal for applications that require data retention of CMOS RAM during fault conditions. When the voltage at VDDdrops below a preset threshold (VIT), the active low push-pullRESEToutput asserts, and VOUTswitches from VDDto VBAT. When VDDrises above the trip threshold, VOUTswitches immediately from VBATto VDD. TheRESEToutput remains low until the delay time (td) expires. During power on,RESETis asserted when the supply voltage (VDDor VBAT) goes higher than 1.1 V. The PFI andPFOpins are provided if additional voltage monitoring is needed. If the voltage at PFI is less than 1.15 V, the push-pullPFOpin will assert low. When the voltage at PFI exceeds the threshold voltage,PFOwill go high. These devices also feature a watchdog timer pin (WDI) that monitors processor activity and assertsRESETif the the processor is inactive longer than the watchdog timeout period. If the watchdog timer is not used, the WDI pin should be left floating. The TPS3617 and TPS3618 are available in an 8-pin MSOP package and are characterized for operation over a temperature range of -40°C to +85°C. The TPS3617 and TPS3618 are battery-backup supervisors that monitor 5 V supplies. They provide a battery-backup function ideal for applications that require data retention of CMOS RAM during fault conditions. When the voltage at VDDdrops below a preset threshold (VIT), the active low push-pullRESEToutput asserts, and VOUTswitches from VDDto VBAT. When VDDrises above the trip threshold, VOUTswitches immediately from VBATto VDD. TheRESEToutput remains low until the delay time (td) expires. During power on,RESETis asserted when the supply voltage (VDDor VBAT) goes higher than 1.1 V. The PFI andPFOpins are provided if additional voltage monitoring is needed. If the voltage at PFI is less than 1.15 V, the push-pullPFOpin will assert low. When the voltage at PFI exceeds the threshold voltage,PFOwill go high. These devices also feature a watchdog timer pin (WDI) that monitors processor activity and assertsRESETif the the processor is inactive longer than the watchdog timeout period. If the watchdog timer is not used, the WDI pin should be left floating. The TPS3617 and TPS3618 are available in an 8-pin MSOP package and are characterized for operation over a temperature range of -40°C to +85°C.