TPS3421 Series

Dual-channel push-button controller with configurable delay & reset pulse

Catalog(3 parts)

Part	Package / Case	Reset Timeout▲▼	Output	Mounting Type	Voltage - Threshold	Operating Temperature▲▼	Operating Temperature▲▼	Type	Reset	Number of Voltages Monitored▲▼	Supplier Device Package▲▼	Supplier Device Package▲▼	Supplier Device Package	Utilized IC / Part	Secondary Attributes	Function	Supplied Contents	Primary Attributes
Texas Instruments TPS3421ECDRYT Supervisor Open Drain or Open Collector 2 Channel 6-SON (1.45x1)	6-UFDFN	0.06400000303983688 s	Open Drain or Open Collector	Surface Mount	Adjustable/Selectable	125 °C	-40 °C	Reset Timer	Active Low	2 ul	1 ul	1.4500000476837158 ul	6-SON
Texas Instruments TPS3421EGDRYT Supervisor Open Drain or Open Collector 2 Channel 6-SON (1.45x1)	6-UFDFN	0.3199999928474426 s	Open Drain or Open Collector	Surface Mount	Adjustable/Selectable	125 °C	-40 °C	Reset Timer	Active Low	2 ul	1 ul	1.4500000476837158 ul	6-SON
Texas Instruments TPS3421EGEVM-156 TPS3421 Push Button On/Off Controller Power Management Evaluation Board								Power Management						TPS3421	Open-Drain Output	Push Button On/Off Controller	Board(s)	2-Channel (Dual)

Key Features

• Very Small Package: 1.45-mm × 1.00-mm SONOperating Range: 1.6 V to 6.5 VSingle (TPS3422) or Dual (TPS3420 andTPS3421) Push-Button InputsLow Supply Current: 250 nA (Typical)Two-State Logic, User-Selectable Input Delay:For Example: 7.5 s and 0 sMultiple Timing Options AvailableFixed Time-out Pulse atRST(TPS3421 andTPS3422): 400 ms (Typical)Other Timing Options Available on RequestActive Low, Open-Drain OutputVery Small Package: 1.45-mm × 1.00-mm SONOperating Range: 1.6 V to 6.5 VSingle (TPS3422) or Dual (TPS3420 andTPS3421) Push-Button InputsLow Supply Current: 250 nA (Typical)Two-State Logic, User-Selectable Input Delay:For Example: 7.5 s and 0 sMultiple Timing Options AvailableFixed Time-out Pulse atRST(TPS3421 andTPS3422): 400 ms (Typical)Other Timing Options Available on RequestActive Low, Open-Drain Output

Description

The TPS3420, TPS3421, and TPS3422 (TPS342x) are low-current, ultrasmall, push-button reset timers. These devices use a long timing setup delay to provide the intended system reset, and avoid resets from short push-button closures or key presses. This reset configuration also allows for differentiation between software interrupts and hard system resets. The TPS3420 and TPS3421 monitor two inputs (PB1 and PB2) and output an active-low reset pulse signal (RST) when both inputs are low for the selected time delay. For the TPS3421,RSTremains low for a factory-programmed fixed time. For the TPS3420,RSTremains low until one of the PBx inputs is released. The need for a dedicated reset button is eliminated because two inputs are used to ensure reset. The TPS3422 monitors one input (PB1) and outputs an active-low reset pulse signal (RST) when PB1 is low for the selected time delay. The TPS342x have an open-drain output that can be wire-ORed with other open-drain devices. The TPS342x operate from 1.6 V to 6.5 V over the –40°C to +125°C temperature range, and provide a precise, space-conscious micropower solution for system resetting needs. The TPS3420, TPS3421, and TPS3422 (TPS342x) are low-current, ultrasmall, push-button reset timers. These devices use a long timing setup delay to provide the intended system reset, and avoid resets from short push-button closures or key presses. This reset configuration also allows for differentiation between software interrupts and hard system resets. The TPS3420 and TPS3421 monitor two inputs (PB1 and PB2) and output an active-low reset pulse signal (RST) when both inputs are low for the selected time delay. For the TPS3421,RSTremains low for a factory-programmed fixed time. For the TPS3420,RSTremains low until one of the PBx inputs is released. The need for a dedicated reset button is eliminated because two inputs are used to ensure reset. The TPS3422 monitors one input (PB1) and outputs an active-low reset pulse signal (RST) when PB1 is low for the selected time delay. The TPS342x have an open-drain output that can be wire-ORed with other open-drain devices. The TPS342x operate from 1.6 V to 6.5 V over the –40°C to +125°C temperature range, and provide a precise, space-conscious micropower solution for system resetting needs.