TTP225 Datasheet, PDF (1/15 Pages) Tontek Design Technology – 8 KEYS TOUCH PAD DETECTOR IC

Preliminary
TTP225
TonTouch^TM
8 KEYS TOUCH PAD DETECTOR IC
GENERAL DESCRIPTION
The TTP225 TonTouch^TM is a touch pad detector IC with open drain output 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
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Operating voltage 2.0V~5.5V
Operating current typical 120uA, max 160uA at VDD=3V
The output refresh rate about 85Hz 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(Q0~Q7) are open drain(active low)
After power-on have 0.5~0.7sec 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 0.5~0.7sec.
When all keys do not touched.
APPLICATION
ƒ Wide consumer products
ƒ Button key replacement
PACKAGE CONFIGURATION
NC2 1
48 SLSE5
NC1 2
47 SLSE4
I7 3
46 SLSE3
I6 4
45 SLSE2
NC 5
44 NC
NC 6
43 SLSE1
NC 7
42 NC
I5 8
41 SLSE0
I4 9
40 VSS
I3 10
39 DV
I2 11 _TTP225 38 Q7
I1 12
37 Q6
I0 13 ^SSOP-48 36 Q5
OPW0 14
35 Q4
OPW1 15
34 Q3
OPT0 16
33 Q2
NC 17
32 NC
OPT1 18
31 OPST
NC 19
30 NC
NC 20
29 Q1
OSC1 21
28 Q0
VSS 22
27 TEST
VDD 23
26 NC3
OPS1 24
25 OPS0
09’/08/25
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