CY25818 Cypress Semiconductor, CY25818 Datasheet - Page 5

• Manufacturer Part Number: CY25818
• Description: Spread Spectrum Clock Generator
• Manufacturer: Cypress Semiconductor

Document #: 38-07362 Rev. *B
SSCG Profiles
CY25818/19 SSCG products use a non-linear “optimized”
frequency profile as shown in Figure 6 and Figure 7. The use
of Cypress proprietary “optimized” frequency profile maintains
flat energy distribution over the fundamental and higher order
harmonics. This results in additional EMI reduction in
electronic systems.
Application Schematic
Notes:
3. X
4. Xin = 32.0MHz; S0 = 1; SSCLK = 32.0 MHz; BW = -2.15%
IN
= 16.0 MHz; S0 = 1; SSCLK = 16.0 MHz; BW = –2.14%.
Figure 6. CY25818 Spread Spectrum Profile
(Frequency vs. Time)
27 pF
27 pF
C2
C3
14.3 MHz
27.0 MHz
or
1
8
6
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Figure 8. Typical Application Schematic
PD#
XOUT
XIN
CY25818
CY25819
Vdd
Vss
2
7
C3
REFCLK
SSCLK
Figure 7. CY25819 Spread Spectrum Profile
S0
0.1 uF
3
4
5
(Frequency vs. Time)
14.3 MHz (CY25818)
27.0 MHz (CY25819)
Vdd
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CY25818/19
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