CY25561 Datasheet, PDF (1/8 Pages) Cypress Semiconductor – Spread Spectrum Clock Generator

CY25561
Spread Spectrum Clock Generator
Features
• 50- to 166-MHz operating frequency range
• Wide range of spread selections (9)
• Accepts clock and crystal inputs
• Low-power dissipation
— 70 mW–Typ @ 66 MHz
• Frequency spread disable function
• Center spread modulation
• Low cycle-to cycle jitter
• Eight-pin SOIC package
Block Diagram
Applications
• Desktop, notebook, and tablet PCs
• VGA controllers
• LCD panels and monitors
• Workstations and servers
Benefits
• Peak EMI reduction by 8 to 16 dB
• Fast time to market
• Cost reduction
Pin Configuration
Xin/
CLK
1
Xout 8
VDD ₂
VSS ₃
300 K
REFERENCE
DIVIDER
PD CP
Loop
Filter
MODULATION
CONTROL
FEEDBACK
DIVIDER
vco
INPUT
DECODER
LOGIC
VDD
VDD
20K
20K
20K
20K
VSS
VSS
5
67
SSCC
S1 S0
DIVIDER
&
MUX
XIN/CLK 1
VDD ₂
VSS ³
SSCLK 4
CY25561
8 XOUT
7 S0
6 _S1
5 SSCC
4 SSCLK
Cypress Semiconductor Corporation • 3901 North First Street • San Jose, CA 95134 • 408-943-2600
Document #: 38-07242 Rev. *B
Revised October 16, 2002