CK-SSC Spread Spectrum Clock Generator
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-
µ
A 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
C L K IN
V D D
G N D
* P W R D W N #
S C L O C K
S D A T A
R E F O U T
C Y 2 5 8 2 2 - 2
C L K O U T
* 1 5 0 K
Ω
P u ll-u p
Freq.
Phase
Modulating
VCO
Post
CLKOUT
Detector
Charge
Pump
Waveform
Dividers
Divider
Feedback
Divider
PLL
GND
VDD
Σ
M
N
Clock Input
(SSCG Output)
REFOUT
Logic
Control
SDATA
SCLOCK
PWRDWN#
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