CY2314ANZ Datasheet, PDF (1/8 Pages) Cypress Semiconductor – 14 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs

0NZCY 2310
14ANZ
Features
• One input to 14 output buffer/driver
• Supports up to three SDRAM DIMMs
• Two additional outputs for feedback
• Serial interface for output control
• Low skew outputs
• Up to 100-MHz operation
• Multiple V_DD and V_SS pins for noise reduction
• Dedicated OE pin for testing
• Low EMI outputs
• 28-pin SOIC (300-mil) package
• 3.3V operation
Block Diagram
CY2314ANZ
14 Output, 3.3V SDRAM Buffer for
Desktop PCs with 3 DIMMs
Functional Description
The CY2314ANZ is a 3.3V buffer designed to distribute
high-speed clocks in desktop PC applications. The part has 14
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^® II pro-
cessors. The CY2314ANZ can be used in conjunction with the
CY2280, CY2281, CY2282 or similar clock synthesizer for a
complete Pentium II motherboard solution.
The CY2314ANZ also includes a serial interface which can
enable or disable each output clock. On power-up, all output
clocks are enabled. A separate Output Enable pin facilitates
testing on ATE.
Pin Configuration
BUF_IN
SDATA
SCLOCK
Serial Interface
Decoding
OE
Pentium is a registered trademark of Intel Corporation.
SDRAM0
SDRAM1
SDRAM2
SDRAM3
SDRAM4
SDRAM5
SDRAM6
SDRAM7
SDRAM8
SDRAM9
SDRAM10
SDRAM11
SDRAM12
SDRAM13
V_DD
SDRAM0
SDRAM1
V_SS
V_DD
SDRAM2
SDRAM3
V_SS
BUF_IN
SDRAM4
SDRAM5
SDRAM12
V_DDIIC
SDATA
28-pin SOIC
Top View
1
28
2
27
3
26
4
25
5
24
6
23
7
22
8
21
9
20
10
19
11
18
12
17
13
16
14
15
V_DD
SDRAM11
SDRAM10
V_SS
V_DD
SDRAM9
SDRAM8
V_SS
OE
SDRAM7
SDRAM6
SDRAM13
V_SSIIC
SCLK
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
Document #: 38-07143 Rev. *A
Revised December 14, 2002