TPS3818 Series

low quiescent current, Accurate programmable-delay supervisor

Catalog

low quiescent current, Accurate programmable-delay supervisor

Part	Mounting Type	Type	Reset Timeout (Minimum)	Output	Number of Voltages Monitored	Reset	Package / Case	Voltage - Threshold	Operating Temperature (Max)	Operating Temperature (Min)	Package Width	Package Name	Package Length
Texas Instruments TPS3818G25DRVT	Surface Mount	Simple Reset/Power-On Reset	180 ms	Open Collector Open Drain	1	Active Low	6-WDFN Exposed Pad	2.33 V	125 °C	-40 °C	2 mm	6-WSON	2 mm
Texas Instruments TPS3818G25DRVR	Surface Mount	Simple Reset/Power-On Reset	180 ms	Open Collector Open Drain	1	Active Low	6-WDFN Exposed Pad	2.33 V	125 °C	-40 °C	2 mm	6-WSON	2 mm

Catalog

low quiescent current, Accurate programmable-delay supervisor

Description

The TPS3818xxx family of microprocessor supervisory circuits monitor system voltages from 0.4V to 5.0V, asserting an open-drainRESETsignal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. TheRESEToutput remains low for the user-adjustable delay time after the SENSE voltage and manual reset (MR) return above the respective thresholds. The TPS3818 uses a precision reference to achieve 0.5% threshold accuracy for VIT≤ 3.3V. The reset delay time can be set to 20ms by disconnecting the CTpin, 300ms by connecting the CTpin to VDDusing a resistor, or can be user-adjusted between 1.25ms and 10s by connecting the CTpin to an external capacitor. When used with an external capacitor, the TPS3818xxx gives a more accurate delay time than the similar TPS3808xxx device. The TPS3818 has a very low typical quiescent current of 2.4µA so it is well-suited to battery-powered applications. It is available in either a small SOT23 and an ultra-small 2mm × 2mm QFN PowerPAD package, and is fully specified over a temperature range of -40°C to +125°C (TJ). The TPS3818xxx family of microprocessor supervisory circuits monitor system voltages from 0.4V to 5.0V, asserting an open-drainRESETsignal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. TheRESEToutput remains low for the user-adjustable delay time after the SENSE voltage and manual reset (MR) return above the respective thresholds. The TPS3818 uses a precision reference to achieve 0.5% threshold accuracy for VIT≤ 3.3V. The reset delay time can be set to 20ms by disconnecting the CTpin, 300ms by connecting the CTpin to VDDusing a resistor, or can be user-adjusted between 1.25ms and 10s by connecting the CTpin to an external capacitor. When used with an external capacitor, the TPS3818xxx gives a more accurate delay time than the similar TPS3808xxx device. The TPS3818 has a very low typical quiescent current of 2.4µA so it is well-suited to battery-powered applications. It is available in either a small SOT23 and an ultra-small 2mm × 2mm QFN PowerPAD package, and is fully specified over a temperature range of -40°C to +125°C (TJ).