Specification	TPS3617-50DGKR

Mounting Type	Surface Mount
Number of Voltages Monitored	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output	Totem Pole, Push-Pull
Package / Case	8-MSOP, 8-TSSOP
Package / Case	3 mm
Package / Case [custom]	0.118 in
Reset	Active Low
Reset Timeout	60 ms
Type	Battery Backup Circuit
Voltage - Threshold	4.55 V

TPS3617-50 Series

Battery-backup supervisor for RAM retention with power fail input & watchdog timer

Part	Reset	Output	Package / Case	Package / Case [custom]	Package / Case	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Threshold	Number of Voltages Monitored	Reset Timeout	Type	Mounting Type
Texas Instruments TPS3617-50DGKR	Active Low	Push-Pull Totem Pole	8-MSOP 8-TSSOP	0.118 in	3 mm	-40 °C	85 °C	4.55 V	1	60 ms	Battery Backup Circuit	Surface Mount
Texas Instruments TPS3617-50DGK	Active Low	Push-Pull Totem Pole	8-MSOP 8-TSSOP	0.118 in	3 mm	-40 °C	85 °C	4.55 V	1	60 ms	Battery Backup Circuit	Surface Mount
Texas Instruments TPS3617-50DGKG4	Active Low	Push-Pull Totem Pole	8-MSOP 8-TSSOP	0.118 in	3 mm	-40 °C	85 °C	4.55 V	1	60 ms	Battery Backup Circuit	Surface Mount

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tape & Reel (TR)	2500	$ 1.63
		5000	$ 1.57
Texas Instruments	LARGE T&R	1	$ 2.83
		100	$ 2.48
		250	$ 1.74
		1000	$ 1.40

Description

General part information

TPS3617-50 Series

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.

Documents

Technical documentation and resources

Battery-Backup Supervisor for RAM Retention datasheet (Rev. D)

Data sheet