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PDF TTP232 Data sheet ( Hoja de datos )
| Número de pieza | TTP232 | |
| Descripción | 2 keys Touch Pad Detector IC | |
| Fabricantes | TONTEK | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TTP232 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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2 keys Touch Pad Detector IC
TTP232
Outline
The TTP232 TonTouchTM IC is capacitive sensing design specifically for touch pad controls.
The device built in regulator for touch sensor. Stable sensing method can cover diversity
conditions. Human interfaces control panel links through non-conductive dielectric material.
The main application is focused at replacing of the mechanical switch or button. The ASSP
can independently handle the 2 touch pads with 2 direct output pins
Characteristic
Operating voltage 2.4V ~ 5.5V
Built-in regulator for touch sensor
Operating current, @VDD=3V no load
At stand-by typical 2.5uA
Have two kinds of response time max about 220mS/270mS from stand-by state @VDD=3V, it
selects by pad option（DBT pin）
Sensitivity can adjust by the capacitance（1~50pF）outside for each touch pad
Provides direct mode or toggle mode、active high or active low by pad option（TOG/AHLB pin）
Have the maximum on time 16sec/infinite by pad option（MOTB pin）
Offer multi-key or single-key feature by pad option（SM pin）
After power-on have about 0.5sec stable-time, during the time do not touch the key pad, and
the function is disabled
Auto calibration for life
The re-calibration period is about 1 sec within 8 sec after power-on. When key has been
touched within 8 sec or key has not been touched more than 8 sec after power-on, then the
re-calibration period change to 4 sec
Applications
Wide consumer products
Button key replacement
12/06/25
Page 1 of 8
Version：1.0
Reference Only
1 page  
TTP232
Ⅲ. Maximum key on duration time（By MOTB pad option）
If some objects cover in the sense pad, and causing the change quantity enough to be detected.
To prevent this, the TTP232 sets a timer to monitor the detection. The timer is the maximum on
duration time. When the detection is over the timer, the system will return to the power-on initial
state, and the output becomes inactive until the next detection
MOTB
1
0
Option features
Infinite（Disable maximum on time）
Maximum on time 16 sec
Remark
Default
Ⅳ. Key operating mode（By SM pad option）
The TTP232 has the Single-key and Multi-key functions by SM pad option
SM
Option features
Remark
1
Multi-key mode
Default
0 Single key mode
Multi-key mode：The TP0-TP1 can be detected 2 keys the same time
Single-key mode：The TP0-TP1 can be detected 1 key only at the same time, when any key be
detected, the other keys can not be detected
Ⅴ. The response time select（By DBT pad option）
The TTP232 has two kinds of response time functions by DBT pad option
DBT
1
0
Option features
220 msec
270 msec
Remark
Default
Ⅵ. The operating timing for key scanning
The states and timing for key scanning
Stand-by timing
Touch operation timing Stand-by timing
TP VDD
VSS
TPQ VDD
VSS
~125ms
~16ms
POSSIBLE KEY TOUCH KEY RELEASE
(NOT REALLY TOUCH)
~125ms
~16ms
KEY TOUCH
Touch operation timing
KEY RELEASE
ABOUT 8SEC
Stand-by timing
~125ms
12/06/25
Page 5 of 8
Version：1.0
Reference Only
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet TTP232.PDF ] | |
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