TTP232

12/06/25

Page 6 of 8

Version：1.0

Reference Only

Application circuit

104

C1

Cs0

K0

VCC

K1

Cs1

NC 9

TPQ0 11

AHLB 12

VSS 13

TOG 14

VDD 16

TP0 15

6 TPQ1

5 SM

4 MOTB

3 DBT

2 TP1

NC 10

8 NC

7 NC

1 NC

P.S.：

1.

On PCB, the length of lines from touch pad to IC pin shorter is better

And the lines do not parallel and cross with other lines

2.

The power supply must be stable. If the supply voltage drift or shift quickly, maybe causing

sensitivity anomalies or false detections

3.

The material of panel covering on the PCB can not include the metal or the electric element.

The paints on the surfaces are the same

4.

The C1 capacitor must be used between VDD and VSS; and should be routed with very short

tracks to the device’s VDD and VSS pins （TTP232）

5.

The capacitance Cs0~Cs1 can be used to adjust the sensitivity. The value of Cs0~Cs1 use

smaller, then the sensitivity will be better. The sensitivity adjustment must according to the

practical application on PCB. The range of Cs0~Cs1 value are 1~50pF

6.

The sensitivity adjustment capacitors（Cs0~Cs1）must use smaller temperature coefficient and

more stable capacitors. Such are X7R, NPO for example. So for touch application, recommend to

use NPO capacitor, for reducing that the temperature varies to affect sensitivity