Pin # 1 2 3 4 5 6 Pin Name Xin/CLK VDD GND SSCLK SSCC S1 Type I P P O I I Positive power supply Power supply ground SSCG modulated clock output Spread spectrum clock control (enable/disable) function.
SSCG function is enabled when input is high and disabled when input is low.
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CY25562
Spread Spectrum Clock Generator
Features
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Applications
■ ■ ■
50 to 200 MHz Operating Frequency Range Wide range of spread selections: 9 Accepts Clock and Crystal Inputs Low Power Dissipation ❐ 70 mW Typ (Fin = 65 MHz) Frequency Spread Disable Function Center Spread Modulation Low Cycle-to-cycle Jitter 8-pin SOIC Package
High resolution VGA controllers LCD panels and monitors Workstations and servers
Benefits
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■ ■ ■ ■
Peak EMI reduction by 8 to 16 dB Fast time to market Cost reduction
Logic Block Diagram
300K
Xin/ CLK
1
REFERENCE DIVIDER
PD
CP
Loop Filter
Xout
8
MODULATION CONTROL
FEEDBACK DIVIDER
vco
VDD
2
INPUT DECODER LOGIC
VDD VDD
DIVIDER & MUX
4 SSCLK
VSS
3
20 K
20 K
20 K
VSS
20 K
VSS
5 SSCC
6 S1
7 S0
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