CY25560
Spread Spectrum Clock Generator
Features
鈥?25- to 100-MHz operating frequency range
鈥?Wide (9) range of spread selections
鈥?Accepts clock and crystal inputs
鈥?Low power dissipation:
鈥?56 mW @ Fin = 25 MHz
鈥?89 mW @ Fin = 65 MHz
鈥?139 mW @ Fin = 100 MHz
鈥?Frequency spread disable function
鈥?Center spread modulation
鈥?Low cycle-to cycle jitter
鈥?8-pin SOIC package
鈥?Commercial and Industrial temperature ranges
Applications
鈥?Desktop, notebook, and tablet PCs
鈥?VGA controllers
鈥?LCD panels and monitors
鈥?Printers and multifunction devices (MFP)
Benefits
鈥?Peak electromagnetic interference (EMI) reduction by 8 to
16 dB
鈥?Fast time to market
鈥?Cost reduction
Block Diagram
Pin Configuration
250 K
Xin/
CLK
1
REFERENCE
DIVIDER
PD
CP
Loop
Filter
XIN/CLK 1
VDD 2
VSS 3
SSCLK 4
8 XOUT
7 S0
Xout
8
CY25560
6 S1
5 SSCC
MODULATION
CONTROL
FEEDBACK
DIVIDER
vco
VDD
2
3
INPUT
DECODER
LOGIC
VDD
20 K
VDD
20 K
DIVIDER
&
MUX
4
SSCLK
VSS
20 K
20 K
5
SSCC
VSS
6
S1
7
S0
VSS
Cypress Semiconductor Corporation
Document #: 38-07425 Rev. *D
鈥?/div>
3901 North First Street
鈥?/div>
San Jose
,
CA 95134
鈥?/div>
408-943-2600
Revised January 28, 2005
next