ICS181-51

ICS181-51 www.DataSheet4U.com Low EMI Clock Generator Description The ICS181-51 generates a low EMI output clock from a clock or crystal input. The device uses ICS’ proprietary mix of analog and digital Phase-Locked Loop (PLL) technology to spread the frequency spectrum of the output, thereby reducing the frequency amplitude peaks by several dB. The ICS181-51 offers center spread selection of +/-0.625% and +/-1.875%. Refer to the MK1714-01/02 for the widest selection of input frequencies and multipliers. ICS offers a complete line of EMI reducing clock generators. Consult us when you need to remove crystals and oscillators from your board. Features Pin and function compatible to Cypress W181-51 Packaged in 8-pin SOIC Provides a spread spectrum output clock Accepts a clock input and provides same frequency dithered output Input frequency of 28 to 75 MHz for Clock input Peak reduction by 7dB - 14dB typical on 3rd - 19th odd harmonics Spread percentage selection for +/-0.625% and +/-1.875% Operating voltage of 3.3 V and 5 V Advanced, low-power CMOS process Block Diagram VDD FS2:1 SS% PLLClock Synthesis andSpread Spectrum Circuitry CLK X1/CLKIN X2 ClockBuffer/ Crystal Oscillator GND MDS 181-51 A 1 l Revision 110404 tel (408 ) 29 7-120 1 l I n t e gra t e d C i r cu i t S y s t e m s l 5 25 Race Street, San Jo se, CA 9 512 6 w w w. i c st . c o m ICS181-51 LOW EMI CLOCK GENERATOR www.DataSheet4U.com Pin Assignment X1/CLKIN X2 GND SS% 1 2 3 4 8 7...