650GI-44LF

DATASHEET SPREAD SPECTRUM CLOCK SYNTHESIZER ICS650-44 Description Features The ICS650-44 is a spread spectrum clock synthesizer Packaged in 16-pin TSSOP (173 mil) intended for video projector and digital TV applications. It Supply voltages: VDD = 3.3 V, VDDO = 2.5 V generates three copies of an EMI optimized 50 MHz clock Peak-to-peak jitter: 125 ps typ signal (EMI peak reduction of 7 to 14 dB on 3rd through 19th harmonics) through the use of Spread Spectrum Output duty cycle 45/55% (worst case) techniques from a 25 MHz crystal or clock input. The 25 MHz crystal or reference clock input modulation rate is 50 kHz. Zero (0) ppm frequency error on all output clocks Advanced, low-power CMOS process Industrial temperature range (-40 to +85C) Pb (lead) free package Block Diagram VDD VDDO 3 25 MHz crystal or clock input X1/CLKIN 50M Crystal OSC X2 PLL with 50M Spread External capacitors are Spectrum required with a crystal input. Control FS3:0 Logic 50M 2 GND PDTS IDT / ICS SPREAD SPECTRUM CLOCK SYNTHESIZER 1 ICS650-44 REV E 051310ICS650-44 SPREAD SPECTRUM CLOCK SYNTHESIZER CLOCKSYNTHESIZER Pin Assignment Spread Spectrum and Output Configuration Table X2 X1/ CLKIN 1 16 FS3 FS2 FS1 FS0 Spread Type SS Out VDD 0 0 0 0 Center 0.25 FS0 2 15 0 0 0 1 Center 0.50 PDTS FS1 3 14 0 0 1 0 Center 0.75 FS2 50M 4 13 0 0 1 1 Center 1.00 VDD VDD 5 12 0 1 0 0 Center 1.25 GND GND 6 11 0 1 0 1 Center 1.50 VDDO FS3 7 10 0 1 1 0 Center 1.75 50M 50M 8 9 0 1 1 1 Center 2.00 1 0 0 0 Down -0.5 16-pin (173 mil) TSSOP 1 0 0 1 Down -0.75 1 0 1 0 Down -1.0 1 0 1 1 Down -1.25 1 1 0 0 Down -1.5 1 1 0 1 Down -1.75 1 1 1 0 Down -2.0 1 1 1 1 Off Off IDT / ICS SPREAD SPECTRUM CLOCK SYNTHESIZER 2 ICS650-44 REV E 051310