TTP232

12/06/25

Page 4 of 8

Version：1.0

Reference Only

Function Description

Ⅰ. Sensitivity adjustment

The total loading of electrode size and capacitance of connecting line on PCB can affect the

sensitivity. So the sensitivity adjustment must according to the practical application on PCB. The

TTP232 offers some methods for adjusting the sensitivity outside

1. by the electrode size

Under other conditions are fixed. Using a larger electrode size can increase sensitivity.

Otherwise it can decrease sensitivity. But the electrode size must use in the effective scope

2. by the panel thickness

Under other conditions are fixed. Using a thinner panel can increase sensitivity. Otherwise it

can decrease sensitivity. But the panel thickness must be below the maximum value

3. by the value of Cs0~Cs1（please see the down figure）

Under other conditions are fixed. Add the capacitors Cs0~Cs1 can fine tune the sensitivity

for single key, that lets all key’s sensitivity identical. When do not use any capacitor to VSS,

the sensitivity is most sensitive. When adding the values of Cs0~Cs1 will reduce sensitivity

in the useful range（1≦Cs0~Cs1≦50pF）

DBT

SM

MOTB

TP1

Cs1

K1

K0

Cs0

TP0

TOG

TPQ0

TPQ1

AHLB

ELECTRODE

VSS

VDD

VDD

Ⅱ. Output mode（By TOG、AHLB pad option）

The TTP232 outputs（TPQ0~TPQ1）has direct mode active high or low by AHLB pad option, has

toggle mode by TOG pad option

TOG

AHLB

Pad

TPQ0 ～ TPQ1 option features

Remark

1

1

Direct mode, CMOS output active high

Default

1

0

Direct mode, CMOS output active low

0

1

Toggle mode, power on state = 0

0

0

Toggle mode, power on state = 1