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PDF TTP223 Data sheet ( Hoja de datos )
| Número de pieza | TTP223 | |
| Descripción | 1 KEY TOUCH PAD DETECTOR IC | |
| Fabricantes | TT | |
| Logotipo |  |
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1. TTP223 pinout datasheet  Hay una vista previa y un enlace de descarga de TTP223 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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Preliminary
TTP223
1 KEY TOUCH PAD DETECTOR IC
GENERAL DESCRIPTION
The TTP223 is a touch pad detector IC which offers 1 touch key. The touching detection IC is
designed for replacing traditional direct button key with diverse pad size. Low power consumption
and wide operating voltage are the contact key features for DC or AC application.
FEATURES
Operating voltage 2.0V~5.5V
Operating current @VDD=3V, no load, SLRFTB=1
At low power mode typical 1.5uA, maximum 3.0uA
At fast mode typical 3.5uA, maximum 7.0uA
@VDD=3V, no load, SLRFTB=0
At low power mode typical 2.0uA, maximum 4.0uA
At fast mode typical 6.5uA, maximum 13.0uA
The response time max about 60mS at fast mode, 220mS at low power mode @VDD=3V
Sensitivity can adjust by the capacitance(0~50pF) outside
Have two kinds of sampling length by pad option(SLRFTB pin)
Stable touching detection of human body for replacing traditional direct switch key
Provides Fast mode and Low Power mode selection by pad option(LPMB pin)
Provides direct mode、toggle mode by pad option(TOG pin)
Open drain mode by bonding option, OPDO pin is open drain output,
Q pin is CMOS output
All output modes can be selected active high or active low by pad option(AHLB pin)
Have the maximum on time 100sec by pad option(MOTB pin)
Have external power on reset pin(RST 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
And the re-calibration period is about 4.0sec, when key has not be touched
APPLICATION
Wide consumer products
Water proofed electric products
Button key replacement
08’/04/07
Page 1 of 11
Ver :1.0
Free Datasheet http://www.datasheet4u.com/
1 page  
Preliminary
TTP223
3. 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 TTP223 sets a timer to monitor the detection. The timer is the maximum on
duration time. It is set about 100sec at 3V. 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
Option features
1 Infinite(Disable maximum on time)
0 Maximum on time 100sec
4. Fast and Low power mode selection (By LPMB pad option)
The TTP223 has Fast mode and Low Power mode to be selected. It depends on the state of LPMB
pad. When the LPMB pin is opened or connected to VDD, the TTP223 runs in Fast mode. When
the LPMB pin is connected to VSS, the TTP223 runs in Low Power mode.
In the Fast mode response time is faster, but the current consumption will be increased. In the Low
Power mode it will be saving power, but will be slowing response time for first touch. When it
awaked in fast mode, the response time is the same the fast mode. In this mode when detecting key
touch, it will switch to Fast mode. Until the key touch is released and will keep a time about 12sec.
Then it returns to Low Power mode.
The states and timing of two modes please see below figure.
LPMB
VDD
VSS
I
VDD
VSS
~20ms
Q VDD
VSS
KEY TOUCH
KEY RELEASE
Fast Mode
LPMB
VDD
VSS
Low Power
mode timing
Fast mode
timing
Low Power
mode timing
Fast mode
timing
I
VDD
VSS
~160ms
~20ms
~160ms
~20ms
POSSIBLE KEY TOUCH KEY RELEASE
(NOT REALLY TOUCH)
KEY TOUCH
Q VDD
VSS
KEY RELEASE
Low Power Mode
ABOUT 12SEC
Low Power
mode timing
~160ms
LPMB
1
0
Option features
Fast mode
Low Power mode
5. Sampling length selection (By SLRFTB pad option)
The TTP223 has two kinds of sampling length to be selected. It depends on the state of SLRFTB
pad. When the SLRFTB pin is opened or connected to VDD, the sampling length is about 1.6msec.
When the SLRFTB pin is connected to VSS, the sampling length is about 3.2msec.
When selecting 3.2msec sampling length the sensitivity will be better, but the current consumption
will be increased. Recommend to use 1.6msec sampling length.
SLRFTB
Option features
1 Sampling length = 1.6msec
0 Sampling length = 3.2msec
08’/04/07
Page 5 of 11
Ver :1.0
Free Datasheet http://www.datasheet4u.com/
5 Page 
ORDER INFORMATION
a. Package form: TTP223-XXX
b. Chip form:
TCP223
c. Wafer base: TDP223
REVISE HISTORY
1. 2008/04/07
-Original version：V_1.0
Preliminary
TTP223
08’/04/07
Page 11 of 11
Ver :1.0
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet TTP223.PDF ] | |
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