CY25818SC CYPRESS [Cypress Semiconductor], CY25818SC Datasheet

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CY25818SC

Manufacturer Part Number
CY25818SC
Description
SPREAD SPECTRUM CLOCK GENERATOR
Manufacturer
CYPRESS [Cypress Semiconductor]
Datasheet
Cypress Semiconductor Corporation
Document #: 38-07362 Rev. *A
Features
• 8- to 32-MHz input frequency range
• CY25818: 8–16 MHz
• CY25819: 16–32 MHz
• Separate modulated and unmodulated clocks
• Accepts clock, crystal, and resonator inputs
• Down spread modulation
• Power-down function
• Low-power dissipation
• Low cycle-to-cycle jitter
• Available in 8-pin (150-mil) SOIC package
Block Diagram
— CY25818 = 33 mW-typ @ 8 MHz
— CY25818 = 56 mW-typ @ 16 MHz
— CY25819 = 36 mW-typ @ 16 MHz
— CY25819 = 63 mW-typ @ 32 MHz
— SSCLK = 250 ps-typ
— REFOUT = 275 ps-typ
XIN/CLKIN
XOUT
VDD
VSS
1
8
7
2
300K
MODULATION
REFERENCE
CONTROL
DECODER
DIVIDER
S0 PD#
INPUT
3
6
3901 North First Street
COUNTER
PD and
VCO
CP
Spread Spectrum Clock Generator
DIVIDER
MUX
and
VCO
LF
Applications
Benefits
• Printers and MFPs
• LCD panels and notebook PCs
• Digital copiers
• PDAs
• Automotive
• CD-ROM, VCD, and DVD
• Networking and LAN/WAN
• Scanners
• Modems
• Embedded digital systems
• Peak electromagnetic interference (EMI) reduction by
• Fast time to market
• Cost reduction
8–16 dB
4
5
REFCLK
SSCLK
San Jose
Pin Configuration
XIN/CLKIN
SSCLK
VSS
CA 95134
S0
Revised December 28, 2002
1
2
3
4
8-pin SOIC
8 Pin SOIC
CY25818
CY25819
CY25818/19
408-943-2600
8
7
6
5
XOUT
VDD
REFCLK
PD#

Related parts for CY25818SC

CY25818SC Summary of contents

Page 1

Features • 32-MHz input frequency range • CY25818: 8–16 MHz • CY25819: 16–32 MHz • Separate modulated and unmodulated clocks • Accepts clock, crystal, and resonator inputs • Down spread modulation • Power-down function • Low-power dissipation — ...

Page 2

Pin Description Pin Name 1 XIN/CLK 2 VSS SSCLK 5 REFCLK 6 PD# 7 VDD 8 XOUT Overview The Cypress CY25818/19 products are Spread Spectrum Clock Generator (SSCG) ICs used for the purpose of reducing EMI ...

Page 3

Figure 1 illustrates how to implement 3-Level Logic. L OGI C L OGI ( CON ...

Page 4

... CCJss Cycle-to-Cycle Jitter CCJref Cycle-to-Cycle Jitter Ordering Information Part Number CY25818SC 8-pin SOIC CY25818SCT 8-pin SOIC – Tape and Reel CY25819SC 8-pin SOIC CY25819SCT 8-pin SOIC – Tape and Reel Note: 1. Single Power Supply: The voltage on any input or I/O pin cannot exceed the power pin during power-up. ...

Page 5

Characteristics Curves The following curves demonstrate the characteristic behavior of the CY25818/19 when tested over a number of environ ...

Page 6

SSCG Profiles CY25818/19 SSCG products use a non-linear “optimized” frequency profile as shown in Figure 6 and Figure 7. The use of Cypress proprietary “optimized” frequency profile maintains Figure 6. CY25818 Spread Spectrum Profile (Frequency vs. Time) Document #: 38-07362 ...

Page 7

Application Schematic 14.3 MHz or 27.0 MHz Package Drawing and Dimensions All product and company names mentioned in this document may be the trademarks of their respective holders. Document #: 38-07362 ...

Page 8

Document Title: CY25818/19 Spread Spectrum Clock Generator Document Number: 38-07362 Issue REV. ECN NO. Date ** 112462 03/21/02 *A 122701 12/28/02 Document #: 38-07362 Rev. *A Orig. of Change Description of Change OXC New Data Sheet RBI Added power up ...

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