Document
Preliminary
TTP223-BA6
1 KEY TOUCH PAD DETECTOR IC
GENERAL DESCRIPTION
The TTP223-BA6 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
APPLICATION
Wide consumer products Button key replacement
08’/08/15
Page 1 of 8
Ver : 1.0
Free Datasheet http://www.datasheet4u.com/
Preliminary
BLOCK DIAGRAM
I Sensor oscillator circuit Sensor & Reference detecting circuit
TTP223-BA6
Output mode & driver circuit
Q
Timing counter
Touch detecting circuit
System oscillator circuit
Key-on & timing control
TOG AHLB
PACKAGE LIST
Package Type SOT-23-6L TTP223-BA6 PACKAGE CONFIGURATION
AHLB I 3 4 TOG 6 1 Q VDD 223B
Lot No.(Latter 5 digit)
PAD DESCRIPTION
Pad No. Pad Name I/O Type 1 2 3 4 5 6
Pin Type I O I/O I-PL P 08’/08/15
VSS
2
5
Pad Description CMOS output pin Negative power supply, ground Input sensor port Output active high or low selection, 1=>Active low; 0(Default)=>Active high Positive power supply Output type option pin, 1=>Toggle mode; 0(Default)=>Direct mode
Q VSS I AHLB VDD TOG
O P I/O I-PL P I-PL
CMOS input only CMOS push-pull output CMOS I/O CMOS input and pull-low resister Power / Ground Page 2 of 8 Ver : 1.0
Free Datasheet http://www.datasheet4u.com
Preliminary
ELECTRICAL CHARACTERISTICS ‧Absolute Maximum Ratings
Parameter Symbol Operating Temperature TOP Storage Temperature TSTG Power Supply Voltage VDD Input Voltage VIN Human Body Mode ESD Note:VSS symbolizes for system ground Conditions ─ ─ Ta=25°C Ta=25°C ─
TTP223-BA6
Value -20 ~ +70 -50 ~ +125 VSS-0.3 ~ VSS+5.5 VSS-0.3 ~ VDD+0.3 4 Unit ℃ ℃ V V KV
‧DC/AC Characteristics:(Test condition at room temperature=25℃) Parameter
Operating Voltage System oscillator Sensor oscillator Operating Current Input Ports Input Ports Output Port Sink Current Output Port Source Current Output Response Time Input Pin Pull-low Resistor
Symbol VDD
FFAST FLOW FSEN
Test Condition
VDD=3V VDD=3V no load VDD=3V at low power mode and output no loa.