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PDF TTP226 Data sheet ( Hoja de datos )
| Número de pieza | TTP226 | |
| Descripción | 8 KEYS TOUCH PAD DETECTOR IC | |
| Fabricantes | TONTEK | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TTP226 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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Preliminary
TTP226
8 KEYS TOUCH PAD DETECTOR IC
GENERAL DESCRIPTION
The TTP222 is a touch pad detector IC which offers 8 touch keys. The touching detection
IC is designed for replacing traditional direct button key with fixed 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 typical 100uA, max 160uA at VDD=3V
The output refresh rate about 55Hz at VDD=3V
64 steps sensitivity selectable (SLSE0~5 pin option)
Another have offer 2 kinds of base-step (OPST pin option)
Stable touching detection of human body for replacing traditional direct switch key
Provides direct mode、matrix mode and serial mode selected by pad option
Maximum 8 input pads and 8 outputs for direct mode;
Maximum 8 input pads for serial interface mode;
Maximum 8 input pads provide fixed 2*4 and 3*3 matrix types
Outputs can be selected active high or active low by pad option
After power-on have 0.8~1.0sec 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 0.8~1.0sec.
When all keys do not touched.
APPLICATION
Wide consumer products
Button key replacement
PACKAGE CONFIGURATION
OSC2
1
TOPAD
2
I7 3
I6 4
NC 5
NC 6
NC 7
I5 8
I4 9
I3 10
I2
I1
I0
11
12
13
TTP226
SSOP-48
OPW0
14
OPW1
15
OPT0
16
NC 17
OPT1
18
NC 19
NC 20
OSC1
21
VSS
22
VDD
23
OPS1
24
48 SLSE5
47 SLSE4
46 SLSE3
45 SLSE2
44 NC
43 SLSE1
42 NC
41 SLSE0
40 VSS
39 DV
38 Q7
37 Q6
36 Q5
35 Q4
34 Q3
33 Q2
32 NC
31 OPST
30 NC
29 Q1
28 Q0
27 TEST
26 AHL
25 OPS0
08’/06/10
Page 1 of 15
Ver : 1.1
1 page  
Preliminary
ELECTRICAL CHARACTERISTICS
‧Absolute Maximum Ratings
TTP226
Parameter
Symbol Conditions
Operating Temperature
TOP
─
Storage Temperature
TSTG
─
Power Supply Voltage
Input Voltage
Human Body Mode
VDD
VIN
ESD
Ta=25°C
Ta=25°C
─
Note：VSS symbolizes for system ground
Value
-20 ~ +70
-50 ~ +125
VSS-0.3 ~ VSS+5.5
VSS-0.3 ~ VDD+0.3
5
Unit
℃
℃
V
V
KV
‧DC/AC Characteristics：(Test condition at room temperature=25℃)
Parameter
Operating Voltage
Reference oscillator
Sensor oscillator
Operating Current
Input Ports
Input Ports
Output port Sink Current
Output Port Source Current
Symbol Test Condition
VDD
OSC1 VDD=3V
OSC2 VDD=3V no load
IOP VDD=3V output no load
VIL Input Low Voltage
VIH Input High Voltage
IOL VDD=3V, Vol=0.6V
IOH VDD=3V, Voh=2.4V
Min. Typ. Max. Unit
2.0 3 5.5 V
- 440K -
- 710K -
Hz
Hz
- 100 160 uA
0 - 0.2 VDD
0.8 - 1.0 VDD
- 8 - mA
- -4 - mA
08’/06/10
Page 5 of 15
Ver : 1.1
5 Page 
Preliminary
TTP226
APPLICATION CIRCUIT
a. For direct mode
APPLICATION FOR DIRECT KEY OUTPUT MODE
KEY7
KEY6
KEY5
KEY4
KEY3
KEY2
KEY1
KEY0
See P.S. : 2 J1
VCC
+2.0 ~ +5.5V
Voltage Regulator
Vin Vout
VSS
1 OSC2
SLSE5 48
2 TOPAD SLSE4 47
3 I7
SLSE3 46
4 I6
SLSE2 45
5 44
6 SLSE1 43
7 42
8 I5
SLSE0 41
9 I4
VSS 40
10 I3 TTP226 DV 39
11 I2 SSOP-48 Q7 38
12 I1
Q6 37
13 I0
Q5 36
14 OPW0
Q4 35
15 OPW1
Q3 34
16 OPT0
Q2 33
17 32
18 OPT1
OPST 31
19 30
20 Q1 29
21 OSC1
Q0 28
22 VSS
TEST 27
23VDD
AHL 26
24 OPS1
OPS0 25
DV
OUT_7
OUT_6
OUT_5
OUT_4
OUT_3
OUT_2
OUT_1
OUT_0
Ci
4.7uF
Co
4.7uF
C2
104
See P.S. : 6
P.S.：1. On PCB, the length of lines from touch pad to IC pins are best the same with K0 to K7.
And the lines do not parallel and cross with other lines.
2. When the application use larger touch pad, recommend to use capacitor on the place of J1.
That can improve the stability. And the value of capacitor can be used by the real application.
Other application can be short on the place of J1.
3. The power supply must be stable. If the supply voltage drift or shift quickly, maybe causing
sensitivity anomalies or false detections.
4. 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.
5. The C2 capacitor must be used between VDD and VSS; and should be routed with very short
tracks to the device’s VDD and VSS pins (TTP226).
6. The value of capacitors can be used by the real application for Ci and Co capacitors.
08’/06/10
Page 11 of 15
Ver : 1.1
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet TTP226.PDF ] | |
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