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SM560

Cypress Semiconductor
Part Number SM560
Manufacturer Cypress Semiconductor
Description Spread Spectrum Clock Generator
Published Jan 19, 2007
Detailed Description www.DataSheet4U.com SM560 Spread Spectrum Clock Generator Features • • • • • • • • • 25- to 108-MHz operating frequenc...
Datasheet PDF File SM560 PDF File

SM560
SM560

Overview
www.
DataSheet4U.
com SM560 Spread Spectrum Clock Generator Features • • • • • • • • • 25- to 108-MHz operating frequency range Wide (9) range of spread selections Accepts clock and crystal inputs Low power dissipation 3.
3V = 85 mw (50 MHz) Frequency Spread disable function Center Spread modulation Low cycle-to cycle jitter Eight-pin SOIC package Applications • VGA controllers • LCD panels and monitors • Printers and multi-function devices (MFP) Benefits • Peak electromagnetic interference (EMI) reduction by 8 to 16 dB • Fast time to market • Cost reduction Block Diagram Pin Configuration 250 K Xin/ CLK 1 4 pf REFERENCE DIVIDER PD CP LF Xin/CLK VDD VSS SSCLK FEEDBACK DIVIDER VCO 1 8 Xout S0 S1 SSCC SM560 2 3 4 7 6 5 MODULATION CONTROL Xout 8 8 pF VDD VSS 2 INPUT DECODER LOGIC DIVIDER AND MUX 3 4 SSCLK 5 6 7 SSCC S1 S0 Cypress Semiconductor Corporation Document #: 38-07020 Rev.
*E • 3901 North First Street • San Jose • CA 95134 • 408-943-2600 Revised June 25, 2004 SM560 Pin Definitions Pin 1 2 3 4 5 6 7 8 Name Xin/CLK VDD GND SSCLK SSCC S1 S0 Xout Type I P P O I I I O Positive power supply.
Power supply ground.
Modulated clock output.
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 high internally.
Tri-level Logic input control pin used to select frequency and bandwidth.
Frequency/bandwidth selection and Tri-level Logic programming.
See Figure 1.
Tri-level Logic input control pin used to select frequency and bandwidth.
Frequency/bandwidth selection and Tri-level Logic programming.
See Figure 1.
Oscillator output pin connected to crystal.
Leave this pin unconnected If an external clock drives Xin/CLK.
Description Clock or Crystal connection input.
Refer to Table 1 for input frequency range selection.
Functional Description The Cypress SM560 is a Spread Spectrum Clock Generator (SSCG) IC used for the purpose of reducing Electro M...


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