W40S11-02 Datasheet, PDF (8/9 Pages) Cypress Semiconductor – SDRAM Buffer - 2 DIMM (Mobile)

Layout Example
W40S11-02
+3.3V Supply
FB
.005PF
C4
G
V_DDQ3
10PF
C3
G
G
1^V
2
3
4
G
5^V
6
7
8
9
G
10 ^V
11
12
13
G
14 V
V 28
G
27
26
25
V ₂₄
G
23
22
21
20
V ₁₉
G
18
17
16
15
FB = Dale ILB1206 - 300 (300:@ 100 MHz)
Ceramic Caps C3 = 10–22 µF
C4 = 0.005 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
All V_DDs have –1 mF low ESR bypass at pin to ground
All bypass caps = 0.1 PF ceramic
Rev 1.0, Dec. 01, 2006
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