Integrated Device Technology Programmable FemtoClock NG LVPECL/LVDS Dual 4-Output Fractional Clock Generator 8T49N524-004NLGI

The IDT8T49N524I is an eight output programmable any-rate dual clock generator with selectable LVDS or LVPECL outputs. Both clock generators use Fractional Output Dividers to be able to generate output frequencies that are independent of each other and independent of the input frequency. Output frequencies for both clock generators are generated from a single crystal or reference clock. Clock Generator A supports three different factory-programmed default frequencies that can be selected from using only the FSEL control pins. Alternatively any desired output frequency can be programmed over the I2C serial port. The chosen output frequency is then driven out the QA0 to QA3 outputs. Clock Generator B supports a single factory-programmed default frequency. It can also be programmed for any output frequency via the serial port. The output frequency is driven out the QB0 to QB3 outputs. Please consult IDT for programming software that can be used to determine the required settings for any desired configuration. Excellent phase noise performance is achieved with IDT ’s fourth Generation FemtoClock® NG PLL technology, which delivers sub-0.5ps RMS phase jitter in the integer divide mode.