7545 datasheet(46/62 Pages) RENESAS

46 / 62 page

Rev.1.06

Mar 07, 2008

Page 46 of 59

REJ03B0140-0106

7545 Group

2. Connection of bypass capacitor

(1) 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.

Fig. 52 Bypass capacitor across the VSS line and the VCC

line

(2) Connection of bypass capacitor across VSS line

and VDDR line

Connect an approximately 0.1

µF bypass capacitor across the

VSS line and the VDDR line as follows:

• Connect a bypass capacitor across the VSS pin and the VDDR

pin at equal length.

• Connect a bypass capacitor across the VSS pin and the VDDR

pin with the shortest possible wiring.

• Use lines with a larger diameter than other signal lines for VSS

line and VDDR line.

• Connect the power source wiring via a bypass capacitor to the

VSS pin and the VDDR pin.

Fig. 53 Bypass capacitor across the VSS line and the VDDR

line

VSS

VCC

VSS

VCC

N.G.

O.K.

VSS

VDDR

VSS

VDDR

N.G.

O.K.

7545 Datasheet(PDF) 46 Page - Renesas Technology Corp

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