Preliminary
TTP229-LSF
TonTouch
TM
16 KEYS OR 8 KEYS TOUCH PAD DETECTOR IC
GENERAL DESCRIPTION
The TTP229-LSF TonTouch
TM
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 8
touch pads or up to 16 touch pads.
FEATURES
Operating voltage：2.4V~5.5V
Built-in regulator
Stand-by current
At 3V, and sleep mode slow sampling rate 8Hz：
=> Typical 2.5uA for 16 input keys
=> Typical 2.0uA for 8 input keys
Provides to set 8 direct keys or 16 direct keys by option
Provides to set 8 separate outputs only for 8 direct input keys mode
Has I
2
C-bus slave interface, both can use for 8 and 16 direct input keys mode
TTP229-LSF Slave Device Identifier and Address => [1010 111R]
8 separate outputs can select output driving types by option
(CMOS/OD/OC with active high/low)
Offer multi-key or single-key feature by option
Provides two kinds of sampling rate that slow sampling rate 8Hz
and fast sampling rate 64Hz at sleep mode
Have the maximum key-on time about 80sec by pin option
Sensitivity can adjust by the capacitance(1~50pF) outside
After power-on have about 0.5sec stable-time,
During the time do not touch the key pad, and all functions are disabled
Auto calibration for environment changing
And the re-calibration period is about 4.0sec, when all keys are not activated for fixed time
APPLICATION
Wide consumer products
Button key replacement
10’/02/25
Page 1 of 18
Ver : 1.0
Preliminary
BLOCK DIAGRAM
SENADJ0
TP0
TP1
TP2
TP3
SENADJ1
TP4
TP5
TP6
TP7
Timing Counter
and
Key Scanning
and
Function Control
Circuit
TTP229-LSF
TonTouch
TM
SENADJ2
TP8
TP9
TP10
TP11
TP12
TP13
TP14
TP15
SENADJ3
SDO
Sense Port
and
Detecting
Circuit
Output Buffer
&
Sense Input
Circuit
SLPSENA
SLPSENB
Wake-up
Detecing
Control Circuit
System
Oscillator Circuit
Function Option
Control Circuit
I2C-bus interface
Control Circuit
SCL
SDA
TEST
Regulator
Circuit
System
Power On Circuit
PACKAGE CONFIGURATION
SLPSENA
TP3
TP2
SENADJ0
TP1
TP0
TP15
TP14
SENADJ3
TP13
TP12
SDA
SDO
SCL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VSS
VDD
TP4
TP5
SENADJ1
TP6
TP7
TEST
TP8
TP9
SENADJ2
TP10
TP11
SLPSENB
TTP229-L
(SSOP-28)
10’/02/25
Page 2 of 18
Ver : 1.0
Preliminary
PIN DESCRIPTION
Pin No. Pin Name Share Pin I/O Type
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SLPSENA
TP3
TP2
SENADJ0
TP1
TP0
TP15
TP14
SENADJ3
TP13
TP12
SDA
SDO
SCL
SLPSENB
TP11
TP10
SENADJ2
TP9
TP8
TPQ1
TPQ0
TPQ3
TPQ2
TPQ5
TPQ4
SKMS1
KYSEL
I/O
I/O
TTP229-LSF
TonTouch
TM
Pin Description
SAHL
OPDEN
TPQ7
TPQ6
Sleep mode sensitivity adjustment pin for group-A(TP0~7)
Touch pad input pin(KEY-3)
Key action function option-1(Single-key/Multi-key)
Default is all single-key
I/O
Touch pad input pin(KEY-2)
Key number function option(8-keys/16-keys)
Default is 8-keys
I/O
Touch pad TP0~3 sensitivity adjust common pin
I/O
Touch pad input pin(KEY-1)
Output type function option(Active High/Low)
Default is active-high for TPQ0~7
I/O
Touch pad input pin(KEY-0)
Output type function option(CMOS/OD/OC for 8-keys)
Default is CMOS
I/O/OD Touch pad input pin(KEY-15)
8-keys direct output pin(TPQ7)
I/O/OD Touch pad input pin(KEY-14)
8-keys direct output pin(TPQ6)
I/O
Touch pad TP12~15 sensitivity adjust common pin
I/O/OD Touch pad input pin(KEY-13)
8-keys direct output pin(TPQ5)
I/O/OD Touch pad input pin(KEY-12)
8-keys direct output pin(TPQ4)
I/OD Data pin for the I
2
C-bus serial data interface
O
I
I/O
Data valid signal output, option active Low/High by TP1
Serial clock input pin for the I
2
C-bus serial interface
Sleep mode sensitivity adjustment pin for
group-B(TP8~15)
I/O/OD Touch pad input pin(KEY-11)
8-keys direct output pin(TPQ3)
I/O/OD Touch pad input pin(KEY-10)
8-keys direct output pin(TPQ2)
I/O
Touch pad TP8~11 sensitivity adjust common pin
I/O/OD Touch pad input pin(KEY-9)
8-keys direct output pin(TPQ1)
I/O/OD Touch pad input pin(KEY-8)
8-keys direct output pin(TPQ0)
10’/02/25
Page 3 of 18
Ver : 1.0
Preliminary
TTP229-LSF
TonTouch
TM
Pin Description
Pin No. Pin Name Share Pin I/O Type
21
22
23
24
25
26
27
28
TEST
TP7
TP6
SENADJ1
TP5
TP4
VDD
VSS
WPSCT
SKMS0
SKSRT
SLWPTM
I-PL
I/O
I/O
I/O
I/O
I/O
P
P
Only for test
Touch pad input pin(KEY-7)
Maximum key-on time function option(Infinite/80sec)
Default is infinite
Touch pad input pin(KEY-6)
Sleep mode sampling length function option(4.0/2.0mS)
Default is 4.0ms
Touch pad TP4~7 sensitivity adjust common pin
Touch pad input pin(KEY-5)
Sampling rate at sleep mode function option(8Hz/64Hz)
Default is 8Hz
Touch pad input pin(KEY-4)
Key action function option-0(Single-key/Multi-key)
Default is all single-key
Positive power supply
Negative power supply, ground
Note：Pin Type
I
＝＞CMOS
input only
I-PH
＝＞CMOS
input and pull-high resister
I-PL
＝＞CMOS
input and pull-low resister
O
＝＞CMOS
push-pull output
I/O
＝＞CMOS
I/O
P
＝＞Power
/ Ground
OD
＝＞CMOS
open drain output
(For OD TPQ0~TPQ7 pins have Diode protective circuit, SDA pin has no Diode protective circuit)
10’/02/25
Page 4 of 18
Ver : 1.0
Preliminary
ELECTRICAL CHARACTERISTICS
‧Absolute
Maximum Ratings
Parameter
Symbol
Operating Temperature
T
OP
Storage Temperature
T
STG
Power Supply Voltage
VDD
Input Voltage
V
IN
Human Body Mode
ESD
Note：VSS symbolizes for system ground
Conditions
─
─
Ta=25°C
Ta=25°C
─
TTP229-LSF
TonTouch
TM
Value
-40 ~ +85
-50 ~ +125
VSS-0.3 ~ VSS+6.0
VSS-0.3 to VDD+0.3
6
Unit
℃
℃
V
V
KV
‧DC/AC
Characteristics：
(Test condition at room temperature=25℃)
Parameter
Operating Voltage
Internal Regulator Output
Operating Current
(no load)
Stand-by Current
(VDD=3.0V)
(Sampling length 4.0mS)
Symbol
VDD
VREG
I
OP
Test Condition
Min. Typ. Max. Unit
2.4
2.2
-
2.3
20
2.0
2.5
5.5
9.0
0
0.8
-
-
-
-
8
-4
125
15.6
32
16
80
30K
0.2
1.0
-
-
VDD
VDD
mA
mA
mS
mS
mS
mS
Sec
ohm
5.5
2.4
V
V
uA
VDD=3.0V
Sampling rate Set 8-Keys
8Hz
Set 16-Keys
Sampling rate Set 8-Keys
64Hz
Set 16-Keys
Input Low Voltage
Input High Voltage
VDD=3V, V
OL
=0.6V
VDD=3V, V
OH
=2.4V
VDD=3V, Sampling rate 8Hz
VDD=3V, Sampling rate 64Hz
VDD=3V, set 16-keys
VDD=3V, set 8-keys
50
VDD=3V,
I
SD
uA
Input Ports
Input Ports
Output Port Sink Current
Output Port Source Current
Wake-up Response Time
(at sleep mode)
Output Response Time
(at operation)
Maximum Key-on Time
Input Pin Pull-low Resistor
(TEST)
V
IL
V
IH
I
OL
I
OH
T
WU
T
R
T
MOT
R
PL
110
10’/02/25
Page 5 of 18
Ver : 1.0
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