ICS849S625I

Crystal-to-LVPECL/LVDS Clock Synthesizer 849S625 Data Sheet General Description Features The 849S625 is a high frequency clock generator. The 849S625 uses an external 25MHz crystal to synthesize 625MHz, 312.5MHz, 156.25MHz and 125MHz clocks. The 849S625 has excellent cycle-to-cycle and RMS phase jitter performance. The 849S625 operates at full 3.3V supply mode and is available in a fully RoHS compliant 48-lead TQFP, E-Pad package. Frequency Table for Bank A, B and C Outputs Ten selectable differential LVPECL or LVDS outputs Output frequencies of 625MHz, 312.5MHz, 156.25MHz or 125MHz using a 25MHz crystal. Crystal interface designed for a 25MHz, parallel resonant crystal Cycle-to-cycle jitter: 25ps (maximum) RMS phase jitter at 156.25MHz (1MHz - 20MHz): 0.375ps (typical), LVDS outputs Output duty cycle: 53% (maximum) Full 3.3V supply mode -40°C to 85°C ambient operating temperature Available in lead-free (RoHS 6) packaging Crystal Frequency (MHz) M Feedback Divider VCO Frequency (MHz) Nx Output Divider Output Frequency (MHz) 25 25 625 1 625 25 25 625 2 312.5 25 25 625 4 156.25 25 25 625 5 125 Pin Assignment VCC REF_CLK VEE BYPASS MR SEL_OUT SELA0 SELA1 VCCA QA0 nQA0 VCCO XTAL_IN XTAL_OUT VEE SELC0 SELC1 OEA VCC OEB OEC SELB0 SELB1 VEE 48 47 46 45 44 43 42 41 40 39 38 37 1 36 2 35 3 34 4 33 5 ICS849S625I 32 6 31 7 30 8 29 9 28 10 27 11 26 12 25 13 14 15 16 17 18 19 20 21 22 23 24 QA1 nQA1 QA2 nQA2 VCCO VE...