TPS3421

ACTIVE

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

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Data sheet

document-pdfAcrobat TPS342x Low-Power, Push-Button Controllers With Configurable Delay datasheet (Rev. B) PDF | HTML

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TPS3423

ACTIVE

Nano-power dual push-button controller with short and long press differentiation Added programmable PB timing and short/long press differential functionality.

TPS3424

ACTIVE

Nanopower push-button controller with programmable delay Added programmable PB timing and short/long press differential functionality.

TPS3421

ACTIVE

Data sheet

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Product details

Rating

Catalog

Number of supplies monitored

2

Features

Push-button

Iq (typ) (mA)

0.00025

Output driver type/reset output

Active-low, Open-drain

Operating temperature range (°C)

-40 to 125

Rating

Catalog

Number of supplies monitored

2

Features

Push-button

Iq (typ) (mA)

0.00025

Output driver type/reset output

Active-low, Open-drain

Operating temperature range (°C)

-40 to 125

USON (DRY)

6

1.45 mm² (1.45 mm × 1 mm)

Very Small Package: 1.45-mm × 1.00-mm SON
Operating Range: 1.6 V to 6.5 V
Single (TPS3422) or Dual (TPS3420 and
TPS3421) Push-Button Inputs
Low Supply Current: 250 nA (Typical)
Two-State Logic, User-Selectable Input Delay:
- For Example: 7.5 s and 0 s
- Multiple Timing Options Available
Fixed Time-out Pulse at RST (TPS3421 and
TPS3422): 400 ms (Typical)
- Other Timing Options Available on Request
Active Low, Open-Drain Output

Very Small Package: 1.45-mm × 1.00-mm SON
Operating Range: 1.6 V to 6.5 V
Single (TPS3422) or Dual (TPS3420 and
TPS3421) Push-Button Inputs
Low Supply Current: 250 nA (Typical)
Two-State Logic, User-Selectable Input Delay:
- For Example: 7.5 s and 0 s
- Multiple Timing Options Available
Fixed Time-out Pulse at RST (TPS3421 and
TPS3422): 400 ms (Typical)
- Other Timing Options Available on Request
Active Low, Open-Drain Output

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, RST remains low for a factory-programmed fixed time. For the TPS3420, RST remains 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, RST remains low for a factory-programmed fixed time. For the TPS3420, RST remains 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.

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Technical documentation

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Top documentation	Type	Title	Format options	Date
*	Data sheet	TPS342x Low-Power, Push-Button Controllers With Configurable Delay datasheet (Rev. B)	PDF \| HTML	Sep 2, 2014
	Selection guide	Voltage Supervisors (Reset ICs) Quick Reference Guide (Rev. H)		Feb 28, 2020
	E-book	Voltage Supervisor and Reset ICs: Tips, Tricks and Basics		Jun 28, 2019
	Selection guide	Power Management Guide 2018 (Rev. R)		Jun 25, 2018

Design & development

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Evaluation board

TPS3421EGEVM-156 — TPS3421EG Evaluation Module

The Texas Instruments TPS3421EGEVM-156 evaluation module (EVM) helps designers evaluate the performance of the TPS3421 Dual Channel Push Button Reset Timer. The TPS3421 is a low-current, ultra-small, push-button controller IC. The device uses a long timing setup delay to provide the intended (...)

User guide: PDF

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Simulation model