TTP223-BA6 [ETC]
1 KEY TOUCH PAD DETECTOR IC;
| 型号： | TTP223-BA6 |
| 厂家： | 
ETC |
| 描述： | 1 KEY TOUCH PAD DETECTOR IC |
| 文件： | 总8页 (文件大小：251K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TTP223-BA6
TTP223N-BA6
TM
Preliminary
1 KEY TOUCH PAD DETECTOR IC
GENERAL DESCRIPTION
The TTP223-BA6/TTP223N-BA6 TonTouchTM 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
At low power mode typical 1.5uA, maximum 3.0uA
The response time max 220mS at low power mode @VDD=3V
Sensitivity can adjust by the capacitance(0~50pF) outside
Stable touching detection of human body for replacing traditional direct switch key
Provides Low Power mode
Provides direct mode、toggle mode by pad option(TOG pin)
Q pin is CMOS output
All output modes can be selected active high or active low by pad option(AHLB 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
At low power mode the re-calibration period is about 4.0sec normally,
When key detected touch and released touch, the auto re-calibration will be redoing after
about 16sec from releasing key
The sensitivity of TTP223N-BA6 is better than TTP223-BA6’s.
But the stability of TTP223N-BA6 is worse than TTP223-BA6’s.
APPLICATION
Wide consumer products
Button key replacement
09’/11/30
Page 1 of 8
Ver : 2.1
TTP223-BA6
TTP223N-BA6
TM
Preliminary
BLOCK DIAGRAM
Sensor &
Reference
detecting circuit
Sensor oscillator
I
circuit
Q
Output
mode
&
driver
circuit
Touch detecting
circuit
Timing counter
TOG
Key-on & timing
control
System oscillator
circuit
AHLB
PACKAGE LIST
Package Type SOT-23-6L
TTP223-BA6 and TTP223N-BA6 PACKAGE CONFIGURATION
TTP223-BA6
TTP223N-BA6
223B
223NB
Lot No.
Lot No.
(Latter 4 digit)
(Latter 4 digit)
PAD DESCRIPTION
Pad No. Pad Name I/O Type
Pad Description
1
2
3
4
Q
VSS
I
O
P
I/O
CMOS output pin
Negative power supply, ground
Input sensor port
AHLB
I-PL Output active high or low selection,
1=>Active low; 0(Default)=>Active high
5
6
VDD
TOG
P
Positive power supply
I-PL Output type option pin,
1=>Toggle mode; 0(Default)=>Direct mode
Pin Type
I
O
I/O
I-PL
P
CMOS input only
CMOS push-pull output
CMOS I/O
CMOS input and pull-low resister
Power / Ground
09’/11/30
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Ver : 2.1
TTP223-BA6
TTP223N-BA6
TM
Preliminary
ELECTRICAL CHARACTERISTICS
‧Absolute Maximum Ratings
Parameter
Operating Temperature
Storage Temperature
Power Supply Voltage
Input Voltage
Symbol
Conditions
─
Value
-40 ~ +85
-50 ~ +125
VSS-0.3 ~ VSS+5.5
VSS-0.3 ~ VDD+0.3
4
Unit
℃
TOP
TSTG
VDD
VIN
─
℃
V
V
KV
Ta=25°C
Ta=25°C
─
Human Body Mode
ESD
Note：VSS symbolizes for system ground
‧DC/AC Characteristics：(Test condition at room temperature=25℃)
Parameter
Operating Voltage
Symbol
VDD
FFAST VDD=3V
FLOW
Test Condition
Min. Typ. Max. Unit
2.0
3
5.5
-
V
System oscillator
-
512K
16K
1M
Hz
Sensor oscillator
Operating Current
FSEN VDD=3V no load
-
-
-
Hz
uA
VDD=3V
at low power mode
and output no load
IOP
1.5 3.0
Input Ports
Input Ports
Input Low Voltage
VIL
0
0.8
-
-
-
0.2 VDD
1.0 VDD
Input High Voltage
VIH
Output Port Sink Current
Output Port Source Current
Output Response Time
VDD=3V, VOL=0.6V
IOL
8
-
-
mA
mA
VDD=3V, VOH=2.4V
IOH
-
-4
VDD=3V, At fast mode
TR
60 mS
220
VDD=3V, At low power mode
Input Pin Pull-low Resistor
VDD=3V,
(TOG, AHLB)
RPL
28K
ohm
09’/11/30
Page 3 of 8
Ver : 2.1
TTP223-BA6
TTP223N-BA6
TM
Preliminary
FUNCTION DESCRIPTION
1. Sensitivity adjustment
The total loading of electrode size and capacitance of connecting line on PCB can affect the
sensitivity. So the sensitivity adjustment must according to the practical application on PCB. The
TTP223-BA6/TTP223N-BA6 offers some methods for adjusting the sensitivity outside.
1-1 by the electrode size
Under other conditions are fixed. Using a larger electrode size can increase sensitivity. Otherwise it
can decrease sensitivity. But the electrode size must use in the effective scope.
1-2 by the panel thickness
Under other conditions are fixed. Using a thinner panel can increase sensitivity. Otherwise it can
decrease sensitivity. But the panel thickness must be below the maximum value.
1-3 by the value of Cs (please see the down figure)
Under other conditions are fixed. When do not use the Cs to VSS, the sensitivity is most sensitive.
When adding the values of Cs will reduce sensitivity in the useful range (0≦Cs≦50pF).
VDD
5
ELECTRODE
VDD
3
1
I
Q
6
4
TOG
AHLB
Cs
VSS
2
2. Output mode
The TTP223-BA6/TTP223N-BA6 has direct mode active high or low by AHLB pad option. And
has toggle mode by TOG pad option. Pad Q is CMOS output.
TOG AHLB
Pad Q option features
0
0
1
1
0
1
0
1
Direct mode,
CMOS active high output
Direct mode,
CMOS active low output
Toggle mode,
Power on state=0
Toggle mode,
Power on state=1
09’/11/30
Page 4 of 8
Ver : 2.1
TTP223-BA6
TTP223N-BA6
TM
Preliminary
3. Low power mode
The TTP223-BA6/TTP223N-BA6 is Low Power mode. It will be saving power. 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 please see below figure.
Low Power
mode timing
Fast mode
timing
Low Power
mode timing
Fast mode
timing
Low Power
mode timing
VDD
VSS
I
~160ms
~20ms
~160ms
~20ms
KEY TOUCH
ABOUT 12SEC
~160ms
POSSIBLE KEY TOUCH
KEY RELEASE
KEY RELEASE
(NOT REALLY TOUCH)
VDD
VSS
Q
Low Power Mode
4. Option pin
For power saving concern and package bonding option consideration, all the feature option pins
with latch type design and initial states are 0 or 1 as power on. If those pins are forced to VDD or
VSS, the states will be changed to 1 or 0 without any current leakage to conflict the power saving
issue.
Feature option pins
Initial state by Power on
AHLB
0
TOG
0
09’/11/30
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Ver : 2.1
TTP223-BA6
TTP223N-BA6
TM
Preliminary
APPLICATION CIRCUIT
VCC
+2.0 ~ +5.5V
Voltage Regulator
Vin
Vout
VSS
Ci
4.7uF
Co
4.7uF
See P.S. : 6
TTP223N-BA6 SOT-23-6L
TTP223-BA6 SOT-23-6L
1 Q
TOG 6
VDD 5
AHLB 4
2 VSS
3 I
104
C1
Cs
Sense Pad
PS：1. On PCB, the length of lines from touch pad to IC pin shorter is better.
And the lines do not parallel and cross with other lines.
2. The power supply must be stable. If the supply voltage drift or shift quickly, maybe causing
sensitivity anomalies or false detections.
3. 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.
4. The capacitance Cs can be used to adjust the sensitivity. The value of Cs use smaller, then
the sensitivity will be better. The sensitivity adjustment must according to the practical
application on PCB. The range of Cs value is 0~50pF.
5. The C1 capacitor must be used between VDD and VSS; and should be routed with very short
tracks to the device’s VDD and VSS pins (TTP223-BA6/TTP223N-BA6).
6. The value of capacitors can be used by the real application for Ci and Co capacitors.
7. The sensitivity adjustment capacitors (Cs) must use smaller temperature coefficient and more
stable capacitors. Such are X7R, NPO for example. So for touch application, recommend to
use NPO capacitor, for reducing that the temperature varies to affect sensitivity.
09’/11/30
Page 6 of 8
Ver : 2.1
TTP223-BA6
TTP223N-BA6
TM
Preliminary
Package Type: SOT-23-6L
Package Outline Dimension
09’/11/30
Page 7 of 8
Ver : 2.1
TTP223-BA6
TTP223N-BA6
TM
Preliminary
ORDER INFORMATION
a. Package form: TTP223-BA6、TTP223N-BA6
REVISE HISTORY
1. 2008/08/15
-Original version：V1.0
2. 2009/08/31 => V_2.0
-Add the TTP223N-BA6.
-Add the trademark 〝 TonTouchTM 〞to every page.
3. 2009/11/30 => V_2.1
- On the page-3 change the Operating Temperature => -40 ~ +85℃.
09’/11/30
Page 8 of 8
Ver : 2.1
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