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PDF TTP229-BSF Data sheet ( Hoja de datos )
| Número de pieza | TTP229-BSF | |
| Descripción | 16 KEYS OR 8 KEYS TOUCH PAD DETECTOR IC | |
| Fabricantes | TONTEK | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TTP229-BSF (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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Preliminary
TTP229-BSF
TonTouchTM
16 KEYS OR 8 KEYS TOUCH PAD DETECTOR IC
GENERAL DESCRIPTION
The TTP229-BSF TonTouchTM 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 a 2-wires serial output interface, both can use for 8 and 16 direct input keys mode
8 separate outputs can select output driving types by option
(CMOS/OD/OC with active high/low)
2-wires serial interface can select active high or low by option
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
09’/12/22
Page 1 of 16
Ver : 1.1
1 page  
Preliminary
ELECTRICAL CHARACTERISTICS
‧Absolute Maximum Ratings
Parameter
Symbol
Operating Temperature
TOP
Storage Temperature
TSTG
Power Supply Voltage
VDD
Input Voltage
Human Body Mode
VIN
ESD
Note：VSS symbolizes for system ground
Conditions
─
─
Ta=25°C
Ta=25°C
─
TTP229-BSF
TonTouchTM
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
Symbol
Test Condition
Min. Typ. Max. Unit
Operating Voltage
VDD
2.4 - 5.5 V
Internal Regulator Output VREG
2.2 2.3 2.4 V
Operating Current
(no load)
Stand-by Current
(VDD=3.0V)
(Sampling length 4.0mS)
IOP VDD=3.0V
Sampling rate Set 8-Keys
8Hz Set 16-Keys
ISD Sampling rate Set 8-Keys
64Hz
Set 16-Keys
20 uA
2.0
2.5
5.5 uA
9.0
Input Ports
VIL Input Low Voltage
0 - 0.2 VDD
Input Ports
VIH Input High Voltage
0.8 - 1.0 VDD
Output Port Sink Current
IOL VDD=3V, VOL=0.6V
- 8 - mA
Output Port Source Current IOH VDD=3V, VOH=2.4V
- -4 - mA
Wake-up Response Time
(at sleep mode)
Output Response Time
(at operation)
Maximum Key-on Time
TWU
TR
TMOT
VDD=3V, Sampling rate 8Hz
VDD=3V, Sampling rate 64Hz
VDD=3V, set 16-keys
VDD=3V, set 8-keys
50
125
15.6
32
16
80 110
mS
mS
mS
mS
Sec
Input Pin Pull-low Resistor
(TEST)
RPL VDD=3V,
30K ohm
09’/12/22
Page 5 of 16
Ver : 1.1
5 Page 
Preliminary
TTP229-BSF
TonTouchTM
9. The timing from sleep mode to operation mode
Finger
Trigger
Wake-up
Detect
Period
Key
Scanning
Period
Detected
Key-out
False Trigger
Sleep mode
Sleep mode
Key scanning
Re-calibration
Time is about 4sec
Time is about 4sec
Figure 9-1. The timing for false trigger
Re-calibration
Finger
Trigger
Wake-up
Detect
Period
Key
Scanning
Period
Detected
Key-out
Valid Trigger
Sleep mode
Operation mode
Sleep mode
About 4sec
Re-calibration About 4sec
Re-calibration
After detected key release and do not any trigger about 8sec
Figure 9-2. The timing for valid trigger
09’/12/22
Page 11 of 16
Ver : 1.1
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet TTP229-BSF.PDF ] | |
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