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7643 bảng dữ liệu(PDF) 363 Page - Renesas Technology Corp

tên linh kiện 7643
Giải thích chi tiết về linh kiện  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  424 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7643 bảng dữ liệu(HTML) 363 Page - Renesas Technology Corp

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7643 Group
REJ09B0133-0200
APPENDIX
3.4 Countermeasure against noise
Rev.2.00
Aug 28, 2006
page 40 of 98
3.4.2 Connection of bypass capacitor across VSS line and VCC line
Connect an approximately 0.1
µF bypass capacitor across the VSS line and the VCC line as follows:
• Connect a bypass capacitor across the VSS pin and the VCC pin at equal length.
• Connect a bypass capacitor across the VSS pin and the VCC pin with the shortest possible wiring.
• Use lines with a larger diameter than other signal lines for VSS line and VCC line.
• Connect the power source wiring via a bypass capacitor to the VSS pin and the VCC pin.
In use of the 7643 group it is recommended to connect 0.1
µF and 4.7 µF capacitors in parallel between
pins Vcc and Vss, and pins AVss and AVcc. However, their capacitors must not be allocated near the
LPF pin.
Fig. 3.4.3 Bypass capacitor across the VSS line and the VCC line
VSS
VCC
VSS
VCC
N.G.
O.K.
VSS
(AVSS)
VCC
(AVCC)
4.7
µS
0.1
µS



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