4 button touch detection IC

Overview

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TTP224B-BSBN/TTP224B-BSB TonTouchTM IC is a touch IC designed using capacitive sensing principle.

This IC has a built-in voltage regulator circuit for the touch sensor, and the stable induction effect can be applied to a wide range of electronic products. panel medium

Must be a completely non-sourced material, designed to replace traditional mechanical switches or normal keys. Provides 4 touch inputs

port and 4 direct output ports.

Features

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Operating voltage 2.4V ~ 5.5V

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Built-in voltage regulator circuit provides stable voltage for touch detection circuit

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Working current @VDD=3V, no load

Typical 2.5uA in low power mode

Typical 13uA in fast mode

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@VDD=3V working voltage:

The fastest response time of KEY is 60ms in fast working mode and 160ms in low power working mode

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The sensitivity of each KEY can be adjusted independently by an external capacitor (1~50pF)

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Provide LPMB port to select fast working mode or low power working mode

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Provides direct output mode, latched output mode, open-drain output, CMOS active high or active low output, via TOG

/OD/AHLB port selection

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Provide MOT0 port selection valid key maximum output time: about 16 seconds/infinity

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Provides the choice of multi-key or single-key output (SM pin)

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After power-on, there is about 0.5 second stabilization time, do not touch the touchpad during this period, all functions are disabled at this time

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Auto calibration function

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The reference value is refreshed every 1 second in the first 8 seconds after the IC is powered on. If a Key is touched or after the 8 seconds is over, it will be changed to every 4 seconds.

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Scope of application

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Various consumer products

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replace button keys