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PDF ( 数据手册 , 数据表 ) TTP226
| 零件编号 | TTP226 | ||
| 描述 | 8 KEYS TOUCH PAD DETECTOR IC | ||
| 制造商 | TONTEK | ||
| LOGO |  |
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1 Page
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
 
Preliminary
Serial mode RST and CK and DO timing (the value is minimum)
17us
DV
RST
CK
DO
62us
62us
62us
D0 D1 D2 D3 D4 D5
TTP226
D6 D7 D0 D1
5. Key on duration time
OPT1
1
1
0
0
OPT0
1
0
1
0
On duration time
Infinite(disable Key-on-time)
10 seconds to reset system
30 seconds to reset system
60 seconds to reset system
When enable key-on-time, any key of the I0~I7 keys has been detected, it will start the key-on-time
counter until releasing key-touch. And for the duration has another key to be detected, the
key-on-time counter will be re-counting.
6. Sensitivity select and Base-step select and Windows of sensitivity select
a. The windows of sensitivity select by OPW0 & OPW1 pins. When the windows of sensitivity is
selected, and the key has detected, the condition for detecting different number will change from
primitive setting numbers to smaller. So the doing will make the key touch detecting stably.
OPW1
1
1
0
0
OPW0
1
0
1
0
Windows selecting
No-windows
1/2-windows
1/4-windows
1/8-windows
b. The selecting base-step of sensitivity
OPST
1
0
Base-step
1-step(1 sensor-clock)
2-step(2 sensor-clock)
c. Sensitivity selecting
The key detecting condition is the value (different clock numbers) of No-windows for detecting
from no-touching to touching. When the key has been detected, the condition of key detecting
and releasing will change to the value of selecting windows for the windows enabling.
08’/06/10
Page 8 of 15
Ver : 1.1
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| 页数 | 15 页 | ||
| 下载 | [ TTP226.PDF 数据手册 ] | ||
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Link :推荐数据表
| 零件编号 | 描述 | 制造商 |
| TTP222 | 8 KEYS TOUCH PAD DETECTOR IC | TONTEK |
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| TTP223-BA6 | 1 KEY TOUCH PAD DETECTOR IC | TT |
| TTP223N-BA6 | 1 KEY TOUCH PAD DETECTOR IC | TT |
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