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STMPE24M31 датащи(PDF) 8 Page - STMicroelectronics

номер детали STMPE24M31
подробное описание детали  S-Touch짰 16/24-channel touchkey controller with PWM and ratio engines
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STMPE24M31 датащи(HTML) 8 Page - STMicroelectronics

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Pin assignment
STMPE16M31, STMPE24M31
8/85
Doc ID 16174 Rev 4
Figure 4.
Sample application - notebook multimedia bar
Table 3.
Limitations on intrinsic capacitance on PCB / flexi PCB(1)
1.
For small PCBs, it is possible to operate the device with CRef left unconnected. However, without a small
capacitance at this pin, the capacitive sensing operation tends to be noisier. It is recommended that a
capacitor of 10 pF to be connected to this pin.
Cmax-Cmin
(Difference between
highest and lowest channel
capacitance)
Cmax
Matching capacitors
< 30 pF
< 30 pF
Not required
<3 0 pF
> 30 pF, < 60 pF
Cref of up to 30 pF required
>30pF, <60pF
> 30 pF, <60 pF
Cref of up to 30 pF required
Channel matching capacitance of up
to 25 pF required
> 60 pF
> 60 pF
PCB optimization required
Obsolete
Product(s)
- Obsolete
Product(s)


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