FemtoClock NG Clock Generator 8V49NS0312 Datasheet with 4 Dividers Description Features Eleven differential LVPECL, LVDS outputs with programmable The 8V49NS0312 is a Clock Generator with four output dividers: voltage swings three integer and one that is either integer or fractional. When used with an external crystal, the 8V49NS0312 generates One LVCMOS output high-performance timing geared towards the communications and Input reference maybe bypassed to this output datacom markets, especially for applications that demand extremely The clock input operates in full differential mode (LVDS, LVPECL) low phase noise, such as 10, 40, and 100GE. or single-ended LVCMOS mode The 8V49NS0312 provides versatile frequency configurations and Driven from a crystal or differential clock input output formats and is optimized to deliver excellent phase noise 2.4-2.5GHz PLL frequency range supports Ethernet, SONET and performance. The device delivers an optimum combination of high CPRI frequency plans clock frequency and low phase noise performance, combined with Four Integer output dividers with a range of output divide ratios high power supply noise rejection. (see Table 7) The 8V49NS0312 supports two types of output levels: LVPECL or One Fractional Output divider can generate any desired output LVDS on eleven of its outputs. In addition, there is a single LVCMOS frequency output that has the option of providing a generated clock or acting as Support of output power-down a reference bypass output. Excellent clock output phase noise The device can be configured to deliver specific output Offset Output Frequency Single-side Band Phase Noise configurations under pin control only or additional configurations 2 100kHz 156.25MHz -143dBc/Hz through an I C serial interface. Phase Noise RMS, 156.25MHz, 12kHz to 20MHz integration It is offered in a lead-free (RoHS6) 64-VFQFPN package. range: 110fs (maximum) Select configurations may be controlled via the use of control input pins without need for serial port access 2 LVCMOS compatible I C serial interface gives access to additional configurations either alone or in combination with the control input pins Single 3.3V supply voltage Lead-free (RoHS 6) 64-VFQFPN packaging -40C to 85C ambient operating temperature 2019 Integrated Device Technology, Inc. 1 April 24, 20198V49NS0312 Datasheet Block Diagram Figure 1: 8V49NS0312 Block Diagram 2019 Integrated Device Technology, Inc. 2 April 24, 2019