产品名称:

WTC6104BSI

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Operating voltage:

WTC6104BSI: 3.3v

WTC6104BSI-L: 2.2v

Output voltage range: GND

Sensing thickness (insulating medium): 0-20mm, maximum 500mm

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 player, mobile phones, electronic toys and learning machines.


WTC6104BSI 4-Channel Capacitive-Sensing Touch Button Chip

Specification (V1. 5)

As an integrated circuit designed for the purpose of implementing a human touch interface, WTC6104BSI 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 WTC6104BSI can realize two to four independent keys, and the users may flexibly use them as required.


Pin Configuration:

WTC6104BSI pin configuration diagram is shown below:

 引脚图2.jpg

 Figure 1: WTC6104BSI Pin Diagram


 Definitions of Pins

Pin No. 

Pin Name

Usage 

Function Description

1

SLOCK_S

|

Selection of output mode Connecting VCC will enable ordinary soft-touch key mode

Connecting GND will enable self-locking key output

mode

2

HLS

|

Selection of initial level of output pin Connect VCC, and the initial level of output pin is

high.

Connect GND, and the initial level of output pin is low.

3

SW3 

|

Interface of touch key 3 (sensor pad 3)

4

SW2

|

Interface of touch key 2 (sensor pad 2)

5

SW1

|

Interface of touch key 1 (sensor pad 1)

6

SW0 

|

Interface of touch key 0 (sensor pad 0)

7

CSEL

|

Capacitor interface for adjusting the sensitivity

8

GND 

|

Power ground

9

OUT0

O

SW0 status output

10

OUT1 

O

SW1 status output

11

/RES

|

IC reset pin

12

VCC

|

Power input

13

OUT2

O

SW2 status output

14

OUT3

O

SW3 status output

15

BUZZ 

O

Buzzer control pin

16

BLC

O

Backlight LED control pin

 

Multi-key (SHIFT) Working Mode:

Figure 4 is operating circuit diagram of WTC6104BSI in 4-key non-self-locking mode:

The channel matched resistance R0-03 should be placed into IC as much as possible.


 WTC6104BSI

                                        Figure 4: WTC6104BSI Application Schematic Diagram


Output in Non-self-locking Mode:

When LOCK_S is connected to VCC, WTC6104BSI will adopt the output mode of ordinary soft-touch switch.

When the occurrence of effective touch on sensor pad is detected, the corresponding indicative pin will

output reversal, and when the finger leaves, the indicative pin will be recovered to output the initial level.

Take SW0 channel as an example, the relationship between output signal and sensor input channel is as

shown in Figure 3, and other channels are the same.


WTC6104BSI

Figure 2: Output Sequence Diagram of Keys when WTC6104BSI is in Non-self-locking Mode

 

Output in Self-locking Mode

When LOCK_S is connected to GND, WTC6104BSI will adopt the output mode of self-locking switch. When the occurrence of effective touch on sensor pad is detected, the corresponding indicative pin of sensor pad will output reversal of level, and when the finger leaves, the output level of indicative pin will remain the same. Take SW0 channel as an example, the relationship between output signal and sensor input channel is as shown in Figure 4. Other channels are the same.


WTC6104BSI

Figure 3: Output Sequence Diagram of Keys when WTC6104BSI is in Self-locking Mode

 


 

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