CY25561

CY25561 Spread Spectrum Clock Generator Features ■ ■ ■ ■ Applications ■ ■ ■ ■ 50 to 166 MHz Operating Frequency Range Wide Range of Spread Selections:9 Accepts Clock and Crystal Inputs Low Power Dissipation ❐ 70 mW–Typ at 66 MHz Frequency Spread Disable Function Center Spread Modulation Low Cycle-to-cycle Jitter 8-pin SOIC Package Desktop, notebook, and tablet PCs VGA controllers LCD panels and monitors Workstations and servers ■ ■ ■ ■ Benefits ■ ■ ■ Peak EMI reduction by 8 to16 dB Fast time to market Cost reduction Logic Block Diagram 300 K 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 20K 20K 20K VSS 20K VSS 5 SSCC 6 S1 7 S0 www.DataSheet4U.net Cypress Semiconductor Corporation Document Number: 38-07242 Rev. *C 198 Champion Court San Jose, CA 95134-1709 408-943-2600 Revised September 15, 2008 [+] Feedback CY25561 Pinout Figure 1. Pin Configuration XIN/CLK 1 VDD 2 8 XOUT 7 S0 CY25561 VSS 3 SSCLK 4 6 S1 5 SSCC Table 1. Pin Description Pin Name 1 2 3 4 5 6 Xin/CLK VDD GND SSCLK SSCC S1 Type I P P O I I Positive power supply Power supply ground Modulated clock output Description Clock or crystal connection input. Refer to Table 2 for input frequency range selection. Spread spectrum clock control (enable/disable) function. SSCG function is enabled when input is high and disabled when input is low. This pin is pulled hig...