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TTP223 Datasheet Preview

TTP223 Datasheet

1 KEY TOUCH PAD DETECTOR IC

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Preliminary
TTP223
1 KEY TOUCH PAD DETECTOR IC
GENERAL DESCRIPTION
The TTP223 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
ƒ Operating voltage 2.0V~5.5V
ƒ Operating current @VDD=3V, no load, SLRFTB=1
At low power mode typical 1.5uA, maximum 3.0uA
At fast mode typical 3.5uA, maximum 7.0uA
@VDD=3V, no load, SLRFTB=0
At low power mode typical 2.0uA, maximum 4.0uA
At fast mode typical 6.5uA, maximum 13.0uA
ƒ The response time max about 60mS at fast mode, 220mS at low power mode @VDD=3V
ƒ Sensitivity can adjust by the capacitance(0~50pF) outside
ƒ Have two kinds of sampling length by pad option(SLRFTB pin)
ƒ Stable touching detection of human body for replacing traditional direct switch key
ƒ Provides Fast mode and Low Power mode selection by pad option(LPMB pin)
ƒ Provides direct modetoggle mode by pad option(TOG pin)
Open drain mode by bonding option, OPDO pin is open drain output,
Q pin is CMOS output
ƒ All output modes can be selected active high or active low by pad option(AHLB pin)
ƒ Have the maximum on time 100sec by pad option(MOTB pin)
ƒ Have external power on reset pin(RST pin)
ƒ After power-on have about 0.5sec stable-time, during the time do not touch the key pad,
And the function is disabled
ƒ Auto calibration for life
And the re-calibration period is about 4.0sec, when key has not be touched
APPLICATION
ƒ Wide consumer products
ƒ Water proofed electric products
ƒ Button key replacement
08’/04/07
Page 1 of 11
Ver :1.0
Free Datasheet http://www.datasheet4u.com/




TT

TTP223 Datasheet Preview

TTP223 Datasheet

1 KEY TOUCH PAD DETECTOR IC

No Preview Available !

BLOCK DIAGRAM
Preliminary
Sensor oscillator
I circuit
Sensor &
Reference
detecting circuit
LPMB
MOTB
SLRFTB
RST
Timing counter
System oscillator
circuit
Touch detecting
circuit
Key-on & timing
control
TTP223
Output
mode
&
driver
circuit
Q
OPDO
TOG
AHLB
PAD DESCRIPTION
Pad No.
1
2
3
4
5
6
7
8
9
10
11
Pad Name
Q
OPDO
VSS
LPMB
TOG
VDD
AHLB
RST
SLRFTB
MOTB
I
I/O Type
Pad Description
O
O
P
I-PH
I-PL
P
I-PL
I-PL
I-PH
I-PH
I/O
CMOS output pin
Open drain output pin
Negative power supply, ground
Low power mode selection,
1=>Fast mode; 0=>Low power mode
Output type option pin,
1=>Toggle mode; 0=>Direct mode
Positive power supply
Output active high or low selection,
1=>Active low; 0=>Active high
External power on reset pin
Selecting the sampling length,
1=>about 1.6msec; 0=>about 3.2msec
Maximum on time 100sec selection,
1=>Disable, 0=>Enable
Input sensor port
08’/04/07
Page 2 of 11
Ver :1.0
Free Datasheet http://www.datasheet4u.com/


Part Number TTP223
Description 1 KEY TOUCH PAD DETECTOR IC
Maker TT
Total Page 11 Pages
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