650GI-41LF Renesas

DATASHEET SPREAD SPECTRUM CLOCK SYNTHESIZER ICS650-41 Description Features The ICS650-41 is a spread spectrum clock synthesizer Packaged in 16-pin TSSOP (173 mil) intended for video projector applications. It generates an Supply voltages: VDD = 3.3 V, VDDO = 2.5 V EMI optimized 50 MHz clock signal (EMI peak reduction of Peak-to-peak jitter: 125 ps typ 7 to 14 dB on 3rd through 19th harmonics) through the use of Spread Spectrum techniques from a 25 MHz crystal or Output duty cycle 45/55% (worst case) clock input. For the 50 MHz output, the modulation rate is Guarantees +85C operational condition 50 kHz. 25 MHz crystal or reference clock input In addition to the EMI optimized clock signal, the device Zero (0) ppm frequency error on all output clocks generates a 48 MHz clock for USB. Advanced, low-power CMOS process Industrial temperature range Block Diagram VDD VDDO 25 MHz crystal 3 or clock input X1/CLKIN PLL1 with Crystal Spread 50M OSC Spectrum X2 External capacitors are required with a crystal input. FS3:0 Control PLL2 48M Logic SS EN 2 GND PDTS IDT / ICS SPREAD SPECTRUM CLOCK SYNTHESIZER 1 ICS650-41 REV G 102709ICS650-41 SPREAD SPECTRUM CLOCK SYNTHESIZER CLOCKSYNTHESIZER Pin Assignment Spread Spectrum and Output Configuration Table X1/CLKIN X2 1 16 FS3 FS2 FS1 FS0 Spread Type SS Out FS0 VDD 2 15 0 0 0 0 Center 0.25 FS1 PDTS 3 14 0 0 0 1 Center 0.50 0 0 1 0 Center 0.75 SS EN FS2 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 FS3 VDDO 7 10 0 1 1 0 Center 1.75 48M 50M 8 9 0 1 1 1 Center 2.00 16-pin (173 mil) TSSOP 1 0 0 0 Down -0.5 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 Down -2.25 IDT / ICS SPREAD SPECTRUM CLOCK SYNTHESIZER 2 ICS650-41 REV G 102709