W256
Document #: 38-07256 Rev. *C Page 7 of 9
Layout Example Single Voltage
FB
+3.3V Supply or 2.5V Supply
C2
10 µF
0.005 µF
G G
VDD
C1
28
27
26
25
24
23
22
21
20
18
1
2
3
4
5
6
7
8
9
10
11
12
13
14
19
17
16
15
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
Cermaic CapsC1 = 10–22
µF
C2 = 0.005
µF
FB = Dale ILB1206 – 300 (300@ 100 MHz)
All bypass caps = 0.1 µF ceramic
G
V
G
V
G
V
G
V
G
V
W256
G
G
G
G
G
G
G
G
G
Ordering Information
Ordering Code Package Type Operating Range
W256H 28-pin SSOP Commercial
W256HT 28-pin SSOP – Tape and Reel Commercial
Lead Free
CYW256OXC 28-pin SSOP Commercial
CYW256OXCT 28-pin SSOP – Tape and Reel Commercial
W256
Document #: 38-07256 Rev. *C Page 8 of 9
© Cypress Semiconductor Corporation, 2004. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use
of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be
used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its
products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress
products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.
Package Drawings and Dimension
28-Lead (5.3 mm) Shrunk Small Outline Package O28
51-85079-*C
W256
Document #: 38-07256 Rev. *C Page 9 of 9
Document History Page
Document Title: W256 12 Output Buffer for 2 DDR and 3 SRAM DIMMS
Document Number: 38-07256
REV. ECN NO. Issue Date
Orig. of
Change Description of Change
** 110521 12/04/01 SZV Change from Spec number: 38-01083 to 38-07256
*A 112153 03/01/02 IKA Added 333 MHz for SDRAM
*B 122858 12/19/02 RBI Added power requirements to operating conditions information.
*C 258671 See ECN RGL Added Lead Free Devices

W256H

Mfr. #:
Manufacturer:
Cypress Semiconductor
Description:
IC CLK BUFFER 1:12 180MHZ 28SSOP
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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