产品名称:

WTC1006BSI

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Operating voltage: 3.3v

Output voltage range: GND

Sensing thickness (insulating medium): 0-20mm

Response time of effective touch: Less than 100ms

Operating temperature: -40℃-+85℃

Storage temperature: -50℃-+125℃


Be applicable to various kitchen apparatuses, audio and video devices, air conditioners, sanitary electrical apparatuses, lights and switches, security equipment, instruments, portable players, mobile phones, electronic toys and learning machines.


WTC1006BSI 6-Channel Capacitive-Sensing Touch Switch Chip

Specification (V1.5)

As an integrated circuit designed for the purpose of implementing a human touch interface, WTC1006BSI series touch-sensing IC can take the place of the mechanical soft-touch keys and realize a water-proof, dust-proof, sealed, isolated, solid and beautiful operation interface. One WTC1006BSI can realize three to six independent keys, and the users may flexibly use them as required.


 Pin Configuration:

引脚图3.jpg

  Figure 1: WTC1006BSI Pin Diagram

 

 Definitions of Pins:

The definitions of WTC1006BSI pins are as shown in the table below:

Pin No.Pin NameUsageFunction Description
1SW5|Interface of touch key 5 (sensor pad 5)
2SW4|Interface of touch key 4 (sensor pad 4)
3SW3|Interface of touch key 3 (sensor pad 3)
4SW2|Interface of touch key 2 (sensor pad 2)
5SW1|Interface of touch key 1 (sensor pad 1)
6SW0|Interface of touch key 0 (sensor pad 0)
7CSEL |Capacitor interface for adjusting the sensitivity
8GND|Power ground
9
OUT0O

SW0 status output. Normally it is in high impedance state, and when it is effectively touched, it will output low level, and when finger leaves it, it will return to be in high impedance state.

10OUT1O

SW1 status output. Normally it is in high impedance state, and when it is effectively touched, it will output low level, and when finger leaves it, it will return to be in high impedance state.

11ROSC|Connected to 10K pull-up resistor
12VCC|Power input
13OUT2 O

SW2 status output. Normally it is in high impedance state, and when it is effectively touched, it will output low level, and when finger leaves it, it will return to be in high impedance state.

14OUT3O

SW3 status output. Normally it is in high impedance state, and when it is effectively touched, it will output low level, and when finger leaves it, it will return to be in high impedance state.

15OUT4O

SW4 status output. Normally it is in high impedance state, and when it is effectively touched, it will output low level, and when finger leaves it, it will return to be in high impedance state.

16OUT5O

SW5 status output. Normally it is in high impedance state, and when it is effectively touched, it will output low level, and when finger leaves it, it will return to be in high impedance state.


Output Display:

In case of no effective touch after WTC1006BSI is electrified, the output ports of all keys will be in high impedance state. When effective touch is detected on the sensor pad, the corresponding output channel of WTC1006BSI will output low level within 100ms. When the figure leaves, the output channel will be recovered to be in high impedance state. Take SW0 channel as an example, the relation between its output signals and sensor input channels are shown in Figure 3, and other channels are the same.

WTC1006BS                             Figure 2: Output Sequence Diagram of WTC1006BSI Keys


Peripheral Circuit and Precautions:

The peripheral circuit of WTC1006BSI is very simple, and only needs a few resistors and capacitors. The key component is capacitor CSEL for adjusting the sensitivity and 1K resistor for measuring the matched impedance of circuit. CSEL should use 10%-precision polyester capacitor, capacitor made of X7R material or capacitor made of NOP material. 1K resistance group can provide the best and most stable measurement effect, and CSEL and matched resistance shall be placed as close as possible to IC at PCB layout. Figure 3 is application circuit diagram of WTC1006BSI in 6-key mode:

The matched resistance R1~6 should be placed close to IC as much as possible.

WTC1006BS

                Figure 3: WTC1006BSI Application Schematic Diagram


 

 

 

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