W256 Datasheet, PDF (7/9 Pages) Cypress Semiconductor – 12 Output Buffer for 2 DDR and 3 SRAM DIMMS

Layout Example Single Voltage
+3.3V Supply or 2.5V Supply
FB
VDD
0.005 µF 10 µF
C2
C1
GG
1
28
2^G
G ₂₇
3
26
4^G
V ₂₅
G
G
5^V
G ₂₄
6^G
23
7
22
8
V ₂₁
G
G
9^V
G ₂₀
10
19
11 ^G
18
12
G ₁₇
G
13
14 ^V
G
16
15
FB = Dale ILB1206 – 300 (300Ω @ 100 MHz)
Cermaic Caps C1 = 10–22 µF C2 = 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 bypass caps = 0.1 µF ceramic
W256
Ordering Information
Ordering Code
W256H
W256HT
Lead Free
CYW256OXC
CYW256OXCT
Package Type
28-pin SSOP
28-pin SSOP – Tape and Reel
28-pin SSOP
28-pin SSOP – Tape and Reel
Operating Range
Commercial
Commercial
Commercial
Commercial
Document #: 38-07256 Rev. *C
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