0NZCY2310
13ANZ
CY2313ANZ
13 Output, 3.3V SDRAM Buffer for
Desktop PCs with 3 DIMMs
Features
鈥?One input to 13 output buffer/driver
鈥?Supports up to three SDRAM DIMMs
鈥?One additional outputs for feedback
鈥?Serial interface for output control
鈥?Low skew outputs
鈥?Up to 100-MHz operation
鈥?Multiple V
DD
and V
SS
pins for noise reduction
鈥?Low EMI outputs
鈥?28-pin SOIC (300-mil) package
鈥?3.3V operation
Functional Description
The CY2313ANZ is a 3.3V buffer designed to distribute
high-speed clocks in desktop PC applications. The part has 13
outputs, 12 of which can be used to drive up to three SDRAM
DIMMs, and the remaining can be used for external feedback
to a PLL. The device operates at 3.3V and outputs can run up
to 100 MHz, thus making it compatible with Pentium
庐
II pro-
cessors. The CY2313ANZ can be used in conjunction with the
CY2280, CY2281, CY2282 or similar clock synthesizer for a
complete Pentium II motherboard solution.
The CY2313ANZ also includes a serial interface which can
enable or disable each output clock. On power-up, all output
clocks are enabled.
Block Diagram
Pin Configuration
BUF_IN
SDRAM0
SDRAM1
SDRAM2
SDRAM3
SDRAM4
SDRAM5
SDRAM6
SDRAM7
SDRAM8
SDRAM9
SDRAM10
SDRAM11
SDRAM12
V
DD
SDRAM0
SDRAM1
V
SS
V
DD
SDRAM2
SDRAM3
V
SS
BUF_IN
SDRAM4
SDRAM5
SDRAM12
V
DDIIC
SDATA
28 SOIC
Top View
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5
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7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
SDATA
Serial Interface
Decoding
SCLOCK
V
DD
SDRAM11
SDRAM10
V
SS
V
DD
SDRAM9
SDRAM8
V
SS
V
DD
SDRAM7
SDRAM6
V
SS
V
SSIIC
SCLK
Pentium is a registered trademark of Intel Corporation.
Cypress Semiconductor Corporation
Document #: 38-07144 Rev. *A
鈥?/div>
3901 North First Street
鈥?/div>
San Jose
鈥?/div>
CA 95134 鈥?408-943-2600
Revised December 14, 2002
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