8T49N012

FemtoClock® NG Crystal-to-3.3V, 2.5V LVPECL/LVCMOS Clock Generator with Fanout Buffer 8T49N012 DATA SHEET General Description The 8T49N012 is a high performance Clock Generator with selectable LVPECL or Single-ended outputs. The 8T49N012 can generate selectable frequencies from a crystal or a single-ended reference clock. The frequency is selected from the Frequency Selection Table. Excellent phase noise performance is maintained with IDT’s Fourth Generation FemtoClock® NG PLL technology. Pin Assignment VEE QA0_CMOS nQA0_CMOS VCCO_A QA1_CMOS nQA1_CMOS VEE QA2_CMOS nQA2_CMOS VCCO_A QA3_CMOS nQA3_CMOS VEE nOE_C SE VCC XTAL_SEL PS_SEL VCCA VEE NA_DIV1 NA_DIV0 VCC_X XTAL_OUT XTAL_IN VEE CLK_IN nOE_B 56 55 54 53 52 51 50 49 48 47 46 45 44 43 1 42 2 41 3 40 4 39 5 38 6 37 7 8T49N012 36 8 35 9 34 10 33 11 32 12 31 13 30 14 29 15 16 17 18 19 20 21 22 23 24 25 26 27 28 QC0 nQC0 QC1 nQC1 VCCO_C QC2 nQC2 VEE QC3 nQC3 QC4 nQC4 QC5 nQC5 Features Fourth Generation FemtoClock NG PLL technology Three differential output banks: Bank A: selectable between four pairs of LVPECL or four pairs of complementary LVCMOS/LVTTL outputs Bank B: two pairs of LVPECL outputs Bank C: six pairs of LVPECL outputs Selectable clock input or crystal input. Supports 25MHz fundamental crystal or 25MHz, 50MHz, 66.67MHz clock input Selectable 156.25MHz, 125MHz, 100MHz clock for Bank B and Bank C outputs Selectable 156.25MHz, 125MHz, 100MHz, 250MHz, 312.5MHz, 50MHz, 25MHz, 62.5MHz o...