Programmable FemtoClock NG LVPECL/LVDS IDT8T49N006I Clock Generator with 6-Outputs DATASHEET General Description Features The IDT8T49N006I is a six output Clock Generator with selectable Fourth Generation FemtoClock NG PLL technology 2 LVDS or LVPECL outputs. The IDT8T49N006I can generate any one Six selectable LVPECL or LVDS outputs via I C of four frequencies from a single crystal or reference clock. The four CLK, nCLK input pair can accept the following differential input frequencies are selected from the Frequency Selection Table (Table levels: LVPECL, LVDS, HCSL 2 C interface. The four predefined 3A) and are programmed via I FemtoClock NG VCO Range: 1.91GHz - 2.5GHz frequencies are selected in the user application by two frequency RMS phase jitter at 156.25MHz (12kHz - 20MHz): 228fs (typical) selection pins. Note the desired programmed frequencies must be used with the corresponding crystal or clock frequency as indicated RMS phase jitter at 156.25MHz (10kHz - 1MHz): 175fs (typical) in Table 3A. Full 2.5V or 3.3V power supply Excellent phase noise performance is maintained with IDTs Fourth 2 I C programming interface Generation FemtoClock NG PLL technology, which delivers PCI Express (2.5 Gb/S), Gen 2 (5 Gb/s) and Gen 3 (8 Gb/s) jitter sub-400fs RMS phase jitter. compliant -40C to 85C ambient operating temperature Lead-free (RoHS 6) packaging Pin Assignment 30 29 28 27 26 25 24 23 22 21 31 20 V EE FSEL1 32 V SCLK 19 CC 33 V SDATA 18 EE V EE 34 17 ADDR SEL 35 16 FSEL0 VCCA LOCK 15 nCLK 36 V EE 37 14 CLK V CC 38 13 VEE 39 12 CLK SEL XTAL OUT 40 V EE 11 XTAL IN 1 2 34 56 7 8 9 10 IDT8T49N006I 40-Lead VFQFN 6mm x 6mm x 0.95mm package body 4.65mm x 4.65mm E-Pad NL Package Top View IDT8T49N006A-dddNLGI REVISION A OCTOBER 22, 2013 1 2014 Integrated Device Technology, Inc. nc nc nc nc Q3 Q0 nQ3 nQ0 V VCCO CCO Q4 Q1 nQ4 nQ1 Q2 Q5 nQ5 nQ2 V V EE EE IDT8T49N006I Data Sheet PROGRAMMABLE FEMTOCLOCK NG LVPECL/LVDS CLOCK GENERATOR WITH 6-OUTPUTS Block Diagram LOCK Q0 nQ0 Pulldown Q1 CLK SEL nQ1 XTAL IN Q2 1 Xtal 0 nQ2 Osc XTAL OUT Phase N 6:0 PS Pulldown Detector Q3 CLK FemtoClock NG 1 PU/PD P 1:0 + 0 VCO nCLK nQ3 Charge Pump Q4 nQ4 M 8:1 Q5 nQ5 Pulldown Divider, VPP/FSEL 0 Pulldown Output Type PROG CLK/FSEL 1 Pullup & OUTPUT ENABLE 6 SCLK Output Pullup OUTPUT STYLE 6 SDATA Enable Pulldown Selection ADDR SEL IDT8T49N006A-dddNLGI REVISION A OCTOBER 22, 2013 2 2014 Integrated Device Technology, Inc.