CY25560 Datasheet, PDF (1/8 Pages) Cypress Semiconductor – Spread Spectrum Clock Generator

CY25560
Spread Spectrum Clock Generator
Features
• 25- to 100-MHz operating frequency range
• Wide (9) range of spread selections
• Accepts clock and crystal inputs
• Low power dissipation:
— 56 mW @ Fin = 25 MHz
— 89 mW @ Fin = 65 MHz
— 139 mW @ Fin = 100 MHz
• Frequency spread disable function
• Center spread modulation
• Low cycle-to cycle jitter
• 8-pin SOIC package
• Commercial and Industrial temperature ranges
Block Diagram
Applications
• Desktop, notebook, and tablet PCs
• VGA controllers
• LCD panels and monitors
• Printers and multifunction devices (MFP)
Benefits
• Peak electromagnetic interference (EMI) reduction by 8 to
16 dB
• Fast time to market
• Cost reduction
Pin Configuration
Xin/
CLK
1
Xout 8
VDD ₂
VSS 3
250 K
REFERENCE
DIVIDER
MODULATION
CONTROL
PD CP
FEEDBACK
DIVIDER
Loop
Filter
vco
VDD
20 K
INPUT
DECODER
LOGIC
VDD
20 K
20 K
VSS
5
SSCC
67
S1 S0
20 K
VSS
DIVIDER
&
MUX
XIN/CLK 1
VDD ²
VSS 3
SSCLK 4
CY25560
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 #: 38-07425 Rev. *D
Revised January 28, 2005