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CY25811/12/14
Spread Spectrum Clock Generator
Cypress Semiconductor Corporation
•
198 Champion Court
•
San Jose
, CA 95134-1709
•
408-943-2600
Document Number: 38-07112 Rev. *F
Revised September 21, 2007
Features
■ 4 to 32 MHz input frequency range
■ 4 to 128 MHz output frequency range
■ Accepts clock, crystal, and resonator inputs
■ 1x, 2x, and 4x frequency multiplication:
❐ CY25811: 1x; CY25812: 2x; CY25814: 4x
■ Center and down spread modulation
■ Low power dissipation:
❐ 3.3V = 52 mW-typ at 6 MHz
❐ 3.3V = 60 mW-typ at12 MHz
❐ 3.3V = 72 mW-typ at 24 MHz
■ Low cycle to cycle jitter:
❐ 8 MHz = 480 ps-max
❐ 16 MHz = 400 ps-max
❐ 32 MHz = 450 ps-max
■ Available in 8 pin SOIC and TSSOP packages
■ Commercial and industrial temperature ranges
Applications
■ Printers and MFPs
■ LCD panels
■ Digital copiers
■ PDAs
■ CD-ROM, VCD, and DVD
■ Networking, LAN/WAN
■ Scanners
■ Modems
■ Embedded digital systems
Benefits
■ Peak EMI reduction by 8 to 16 dB
■ Fast time to market
■ Cost reduction
S1
S0
FRSEL
300K
VDD
VSS
XIN
XOUT
SSCLK
8pF
REFERENCE
DIVIDER
PD and
CP
LF
VCO
VCO
COUNTE
R
COUNTER
and
MUX
INPUT
DECODER
LOGIC
1
7
8
2
5
MODULATION
CONTROL
3
4
6
8pF
Logic Block Diagram
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