ICS181-01 Datasheet | Renesas

Description The ICS181-01 generates a low EMI output clock from a clock or crystal input. The device uses IDT’s 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 d B. The ICS181-01 offers down spread selection of -1.25% and -3.75%. Refer to the MK1714-01/02 for the widest selection of input frequencies and multipliers. IDT offers a plete line of EMI reducing clock generators. Consult us when you need to remove crystals and oscillators from your board. Block Diagram Features - Pin and function patible to Cypress W181-01 - 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 7d B - 14d B typical on 3rd - 19th odd harmonics - Spread percentage selection for -1.25% and -3.75% - Operating voltage of 3.3 V and 5 V - Industrial temperature range available - Advanced, low-power CMOS process FS2:1 SS% X1/CLKIN X2 Clock Buffer/ Crystal Oscillator PLL Clock Synthesis and Spread Spectrum Circuitry IDT™ / ICS™ LOW EMI CLOCK GENERATOR ICS181-01 REV D 051310 ICS181-01 LOW EMI CLOCK GENERATOR SSCG Pin Assignment Spread Spectrum Select Table X1/CLKIN 1 X2 2 GND 3 SS% 4 8 FS2 7 FS1 6 VDD 5 CLKOUT 8-pin (150 mil) SOIC SS% (Pin 4) 0 1 Spread Direction Down Down Spread Percentage...