CY25811/12/14
Spread Spectrum Clock Generator
Features
Applications
• 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:
• Printers and MFPs
• LCD panels
• Digital copiers
• PDAs
• CD-ROM, VCD, and DVD
• Networking, LAN/WAN
• Scanners
— 3.3V = 52 mW-typ @ 6MHz
• Modems
— 3.3V = 60 mW-typ @ 12MHz
• Embedded digital systems
— 3.3V = 72 mW-typ @ 24MHz
• Low cycle-to cycle jitter:
Benefits
• Peak EMI reduction by 8 to 16 dB
• Fast time to market
• Cost reduction
— 8 MHz = 450 ps-max
— 16 MHz = 225 ps-max
— 32 MHz = 150 ps-max
• Available in 8-pin SOIC and TSSOP packages
• Commercial and industrial temperature ranges
Block Diagram
Pin Configuration
300K
REFERENCE
DIVIDER
PD and
CP
1
8pF
LF
XIN
1
2
3
4
8
7
6
5
XIN/CLKIN
VSS
XOUT
VDD
8
8pF
XOUT
CY25811
CY25812
CY25814
VCO
COUNTE
R
MODULATION
CONTROL
VCO
FRSEL
SSCLK
S1
7
2
VDD
VSS
INPUT
DECODER
LOGIC
COUNTER
S0
and
5
MUX
SSCLK
6
3
4
8-pin SOIC/TSSOP
S0
S1
FRSEL
Cypress Semiconductor Corporation
•
3901 North First Street
•
San Jose, CA 95134
•
408-943-2600
Document #: 38-07112 Rev. *E
Revised June 03, 2004