CY25819_11 Datasheet, PDF (1/13 Pages) Cypress Semiconductor – Spread Spectrum Clock Generator 8- to 32-MHz input frequency range

CY25819
Spread Spectrum Clock Generator
Spread Spectrum Clock Generator
Features
■ 8- to 32-MHz input frequency range
■ CY25819: 16 MHz to 32 MHz
■ Separate modulated and unmodulated clocks
■ Accepts clock, crystal, and resonator inputs
■ Down spread modulation
■ Power-down function
■ Low-power dissipation
❐ CY25819 = 36 mW typ at 16 MHz
❐ CY25819 = 63 mW typ at 32 MHz
■ Low cycle-to-cycle jitter
❐ SSCLK = 250 ps typ
❐ REFOUT = 275 ps typ
■ Available in 8-pin (150 mil) SOIC package
Block Diagram
300K
XIN/CLKIN 1
XOUT 8
VDD ⁷
VSS ²
Applications
■ 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
Benefits
■ Peak electromagnetic interference (EMI) reduction by 8 dB to
16 dB
■ Fast time to market
■ Cost reduction
REFERENCE
DIVIDER
PD and
CP
LF
MODULATION
CONTROL
VCO
COUNTER
VCO
INPUT
DECODER
36
S0 PD#
DIVIDER
and
MUX
4 SSCLK
5 REFCLK
Cypress Semiconductor Corporation • 198 Champion Court
Document #: 38-07362 Rev. *D
• San Jose, CA 95134-1709 • 408-943-2600
Revised May 10, 2011
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