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CK-SSC Spread Spectrum Clock Generato
r
CY25822-
2
Cypress Semiconductor Corporation • 3901 North First Street • San Jose, CA 95134 • 408-943-2600
Document #: 38-07531 Rev. ** Revised March 18, 2003
Features
• 3.3V operation
• 48- and 66-MHz frequency support
• Selectable slew rate control
• 350-pS jitter
•I
2
C programmability
• 500-µA power-down current
• Spread Spectrum for best electromagnetic interference
(EMI) reduction
• 8-pin SOIC package
Block Diagram
Pin Configuration
1
2
3
4
8
7
6
5
CLKIN
VDD
GND
*PWRDWN#
SCLOCK
SDATA
REFOUT
CY25822-2
CLKOUT
* 150KΩ Pull-up
Freq. Phase
Modulating
VCO
Post
CLKOUT
Detector
Charge
Pump
Waveform
DividersDivider
Feedback
Divider
PLL
GND
VDD
Σ
M
N
Clock Input
(SSCG Output)
REFOUT
Logic
Control
SDATA
SCLOCK
PWRDWN#
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