ICS840051I Datasheet | Integrated Circuit Systems

FEATURES - 1 LVCMOS/LVTTL output, 15Ω output impedance - Crystal oscillator interface designed for 18p F parallel resonant crystals - Output frequency range: 70MHz - 170MHz - VCO range: 560MHz - 680MHz - RMS phase jitter at 155.52MHz (1.875MHz - 20MHz): 0.48ps (typical) - RMS phase noise at 155.52MHz Offset Noise Power 100Hz -99.7 d Bc/Hz 1KHz -120 d Bc/Hz 10KHz -128 d Bc/Hz 100KHz -127 d Bc/Hz - 3.3V or 2.5V operating supply - -40°C to 85°C ambient operating temperature - Lead-Free fully Ro HS pliant GENERAL DESCRIPTION The ICS840051I is a Gigabit Ethernet Clock Generator and a member of the Hi Per Clocks TM Hi Per Clock S™ family of high performance devices from ICS. The ICS840051I can synthesize 10 Gigabit Ethernet, SONET, or Serial ATA reference clock frequencies with the appropriate choice of crystal and output divider. The ICS840051I has excellent phase jitter performance and is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space. .. FREQUENCY TABLE Inputs Crystal Frequency (MHz) 20.141601 20.141601 19.53125 19.53125 19.44 19.44 18.75 18.75 FREQ_SEL 0 1 0 1 0 1 0 1 Output Frequency (MHz) 161.132812 80.566406 156.25 78.125 155.52 77.76 15 0 75 BLOCK DIAGRAM OE Pullup FREQ_SEL Pulldown PIN ASSIGNMENT VDDA OE XTAL_OUT XTAL_IN Q0 1 2 3 4 8 7 6 5 VDD Q0 GND FREQ_SEL XTAL_IN XTAL_OUT Phase Detector 560MHz-680MHz 0 ÷4 (default) 1 ÷8 8-Lead TSSOP 4.40mm x 3.0mm x 0.925mm package body G Package Top View ÷32 (fixed) 840051AGI .icst./products/hiperclocks.html REV. A JANUARY 14, 2005 Integrated Circuit Systems, Inc. FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR Type Power Input Input Input Power Description TABLE 1. PIN DESCRIPTIONS Number 1 2 3, 4...