产品名称:

WTC66K1R

  • 产品参数
  • 应用秘籍
  • 产品概述
  • 工作电路
  • 参考方案

Operating voltage: 3.3V

Output voltage range: GND

Sensing thickness (insulating medium): 0-10mm

Response time of effective touch: Less than 200ms

Operating temperature: -40°C—+85°C

Storage temperature: -50°C—+125°C


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.


WTC66K1R Capacitive sensitive touch switch & roller encoder chip

Specification (V1. 5)

WTC66K1R series touch sensing IC is an integrated circuit designed to achieve human touch interface.It can replace mechanical light touch and mechanical rotary encoder, to realize waterproof and dustproof, seal isolation, solid and beautiful operation interface. A WTC66K1R can achieve 3 ~ 6 independent touch keys and a touch roller encoder. It can provide user with a low-cost human-computer interaction interface. The operation and signal output of the touch roller coder is the same as the mechanical wheel coder. But there are no burrs for the output pulse of the mechanical code. The user does not have to handle the soft and hardware aiming at the burr, and only needs to adjust one capacitor Csel that can change the sensitivity of all channels, with high production efficiency. Through selecting the appropriate Csel capacitance value and properly adjusting the sensing disk area, it can make WTC66K1R to adapt the Insulation panels of different thickness of 0 — 10mm.



 Definitions of WTC66K1R Pins:

 

WTC66K1R (6键+1编码器触摸感应滚轮IC )

             Figure 1:Pin figure


Definitions of WTC62K1R Pins:

Pin No.Pin NameUsageFunction Description
1BLCOBacklight LED control pin
2BUZZOBuzzer control pin
3SW8|Roller induction disc unit interface
4SW9|Roller induction disc unit interface
5SW10|Roller induction disc unit interface
6SW11|Roller induction disc unit interface
7SW12|Roller induction disc unit interface
8SW13|Roller induction disc unit interface
9
SW14|Roller induction disc unit interface
10SW15|Roller induction disc unit interface
11CSEL|Sensitivity adjustable capacitor interface
12GND|Power ground
13CODER1 ORoller encoder pulse output 1
14CODER0ORoller encoder pulse output 0
15OUT0OTouch key SW0 status output
16OUT1OTouch key SW1 status output
17
OUT2OTouch key SW2 status output
18OUT3|/O Touch key SW3 status output
19/RST  |Chip reset pin
20VCC|positive power supply output
21OUT4 OTouch key SW4 status output
22OUT5OTouch key SW5 status output
23SW0|Touch key (induction disc) interface 0
24SW1|Touch key (induction disc) interface 1
25SW2|Touch key (induction disc) interface 2
26SW3|Touch key (induction disc) interface 3
27SW4|Touch key (induction disc) interface 4
28SW5|Touch key (induction disc) interface 5

 

Peripheral Circuit:

  RP1 ,RP2,and R1,R2 are the match resistance group. Please try to place them close to the IC

WTC66K1R

                 Figure 4: WTC66K1R Application Schematic Diagram


Output Display:

The output of the touch key

When the occurrence of effective touch on the sense element is detected, WTC66K1R will output the status of corresponding sense element channel within 100ms, so that it can be processed by user MCU, or directly drive the execution circuit to work

The relationship between the output signal and the touch key input channel is shown below

The signal output does not have the output jitter of the mechanical key. The user does not need to make mechanical key to jitter.

WTC66K1R

                     Figure 2: Sequence diagram of the output of the key


Touch rotary encoder output

The operation mode and output signal of the touch roller are consistent with the common mechanical roller encoder. But there is no the burr of mechanical outputpulse. The user does not have to handle the soft and hardware aiming at the burr

WTC66K1R

                                     Figure 3: Sequence diagram of touch roller output

The rotation of roller gives 18 pulses a week.

The phase difference between the two pulses is around 6ms.



 

 

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