产品名称:

WTC6216BSI

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

Operating voltage: WTC6216BSI: 3.3V

Output voltage range: GND

Sensing thickness (insulating medium): 0-20mm

Response time of effective touch: Less than 100ms

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.


WTC6216BSI Inductive touch key chip of sixteen-way electric capacitance

Specification  (V1.5) )

WTC6216BSI series touch sensing IC is an integrated circuit designed to achieve human touch interface. It can replace the mechanical light touch key to realize waterproof and dustproof, seal isolation, with strong and artistic operation interface. A WTC6216BSI can achieve 4 to 16 independent keys. The user can use it flexibly according to the needs.


Definitions of WTC6216BSI Pins:

WTC6104BSI Pin Diagram

引脚图10.jpg

 Figure 1: WTC6104BSI Pin Diagram

Definitions of WTC6216BSI pins

Pin No.

Pin Name

Usage

Function Description

1

SW9

|

Interface of touch key 9 (sense element 9)

2

SW8

|

Interface of touch key 9 (sense element 8)

3

SW7

|

Interface of touch key 9 (sense element 7)

4

SW6

|

Interface of touch key 9 (sense element 6)

5

SW5

|

Interface of touch key 9 (sense element 5)

6

SW4

|

Interface of touch key 9 (sense element 4)

7

SW3

|

Interface of touch key 9 (sense element 3)

8

SW2

|

Interface of touch key 9 (sense element 2)

9

SW1

|

Interface of touch key 9 (sense element 1)

10

SW0

|

Interface of touch key 9 (sense element 0)

11

CSEL

O

Capacitor interface for adjusting the sensitivity

12

GND

|

Power ground

13

S0

|

The S0 must be connected to VCC usufully for the internal test foot

14

S1

|

The S1 must be connected to VCC usufully for the internal test foot

15

DATA0

|/O

BCD code output and sensitivity fine adjustment input

16

DATA1 

|/O

BCD code output and sensitivity fine adjustment input

17

DATA2

|/O

BCD code output and sensitivity fine adjustment input

18

DATA3

|/O

BCD code output and sensitivity fine adjustment input

19

/RST 

|

Chip reset pin

20

VCC

|

positive power supply output

21

OUT_FLAG

O

Key state indicator: 1 indicates that the key has no effective touch; 0

indicates that there is a key pressed

22

SETUP

|

The symbol of sensitivity fine adjustment input: setting 0 indicates

that the sensitivity is input and set by the user; when setting 1, it

indicates that IC normally performs the test work.

23

SW15

|

Interface of touch key 15 (sense element 15)

24

SW14

|

Interface of touch key 15 (sense element 14)

25

SW13

|

Interface of touch key 15 (sense element 13)

26

SW12

|

Interface of touch key 15 (sense element 12)

27

SW11

|

Interface of touch key 15 (sense element 11)

28

SW10

|

Interface of touch key 15 (sense element 10)


Output Display:

Sequence diagram of BCD interface output

When the effective touch occurred on the induction disk is detected, the WTC6216BSI outputs the BCD code of the corresponding induction disk in 200ms, so that the user MCU can process it. The OUT_FLAG foot indicates the state of the key; 1 indicates that the key has no effective touch, and 0 indicates that it has a key  pressed. The sequential relationship between the OUT_FLAG and BCD code output feet (DATA3 ~ DATA0) is shown in Figure 2

WTC6216BSI

                                          Figure 2: Sequence diagram of key output

Peripheral Circuit:

WTC6216BSI  

                           Figure 3: WTC6216BSI Application Schematic Diagram

 

 

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