®
X2Y Fil t e r & De c o u p l i n g
ca pa c i t o r s
so l d e r
pA d
re c o M M e n d At i o n s
0402 (X07)
IN mm
0603 (X14)
0805 (X15)
1206 (X18)
1210 (X41)
1410 (X44)
1812 (X43)
IN
mm
IN
mm
1.27
0.89
1.27
0.56
2.03
3.05
IN
mm
1.65
1.02
2.03
1.02
3.05
4.06
IN
mm
IN
mm
IN
mm
X
Y
G
V
0.020
0.020
0.024
0.015
0.039
0.064
0.51
0.51
0.61
0.38
0.99
1.63
0.035
0.025
0.040
0.020
0.060
0.090
0.89
0.64
1.02
0.51
1.52
2.29
0.050
0.035
0.050
0.022
0.080
0.120
0.065
0.040
0.080
0.040
0.120
0.160
0.100
0.040
0.080
0.045
0.160
0.160
2.54
1.02
2.03
1.14
4.06
4.06
0.100
0.040
0.100
0.045
0.160
0.180
2.54
1.02
2.54
1.14
4.06
4.57
0.125
0.040
0.130
0.045
0.190
0.210
3.18
1.02
3.30
1.14
4.83
5.33
U
Z
Use of solder mask beneath component is not recommended.
Z
Z
V
V
U
U
X
X
V
V
V
V
V
V
Y
G
Y
G
Good Layout
Poor Layout
Figure 1
optiMizing X2Y pe r F o r M A n c e w it h
pr o p e r
At tA c h M e n t
te c h n i q u e s
X2Y® capacitors excel in low inductance performance for a myriad of applications including EMI/RFI filtering, power supply bypass
/ decoupling. How the capacitor is attached to the application PCB is every bit as important as the capacitor itself. Proper attention
to pad layout and via placement insures superior device performance. Poor PCB layouts squander performance, requiring more
capacitors, and more vias to do the same job. Figure 1 compares the X2Y® recommended layout against a poor layout. Because
of its long extents from device terminals to vias, and the wide via separation, the poor layout shown performs badly. It exhibits
approximately 200% L1 inductance, and 150% L2 inductance compared to recommended X2Y layouts.
For further details on via placement and it’s effect on mounted inductance, please refer to X2Y Attenuators, LLC. application note
“Get the Most from X2Y Capacitors with Proper Attachment Techniques” at www.x2y.com/bypass.htm
®
X2Y technology patents and registered trademark under license from X2Y ATTENUATORS, LLC
Johanson Dielectrics, Inc. reserves the right to make design and price changes without notice. All sales are subject to the terms
and conditions printed on the back side of our sales order acknowledgment forms, including a limited warranty and remedies for
non-conforming goods or defective goods. We will be pleased to provide a copy of these terms and conditions for your review.
JOꢀANSON ꢀONG KONG LTD.
JOꢀANSON EUROPE LTD.
Unit E, 11/F., Phase 1, Kaiser Estate
41 Man Yue Street
Hunghom, Kowloon, Hong Kong
Tel: (852) 2334 6310 • Fax: (852) 2334 8858
Acorn House, Old Kiln Road
Flackwell Heath, Bucks HP10 9NR
United Kingdom
15191 Bledsoe Street
Sylmar, California 91342
Tel (818) 364-9800 • FAX (818) 364-6100
http://www.johansondielectrics.com
Tel +44-162-853-1154 • Fax +44-162-853-2703
© 2008 Publication X2Y0804 Printed in USA
JOHANSON [ JOHANSON TECHNOLOGY INC. ]
