W215B Datasheet, PDF (12/14 Pages) Cypress Semiconductor – Uses external 14.318-MHz crystal

PRELIMINARY
Layout Example
+3.3V Supply
FB
0.005 µF
C4
G
VDDQ3
10 µF
C3
G
G
G
VDDQ3
5Ω
C5 G G C6
1G
2
3
4
5^G
6
7^V
8^G
9
10 ^G
11
12
13
14 ^G
15 ^V
16 ^G
17
18
19
20 ^G
21
22
23
24 G
+2.5V Supply
VDDQ2
FB
10 µF
C1
G
0.005 µF
C2
G
G 48
47
V ₄₆
G
G ₄₅
44
43
42
G ₄₁
V ₄₀
G
G ₃₉
38
37
36
G 35
34 ^VDDQ3
V
Core
G
G ₃₃
32
G ₃₁
30
G 29
V ₂₈
G
G ₂₇
26
G ^V 25
G
W215B
FB = Dale ILB1206 - 300 (300Ω @ 100 MHz)
C1 & C3 = 10–22 µF C2 & C4 = 0.005 µF C5 = 47 µF ^{C6 = 0.1 µF}
G = VIA to GND plane layer V =VIA to respective supply plane layer
Note: Each supply plane or strip should have a ferrite bead and capacitors
Document #: 38-07222 Rev. *A*
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