840NT4NLGI8

System & DDR Clocks for Freescale B4/T4 Processor Systems 840NT4 DATA SHEET General Description Features The 840NT4 is a PLL-based clock generator designed to interface with Freescale B4/T4 Processor systems. The clock generator offers low jitter, low-skew clock outputs, frequency margining (0.025 0.312MHz step granularity), and spread spectrum clocking that meets the ever-growing demands of Freescale’s next generation processors. • Ten LVCMOS clock outputs: four system clocks, four DDR clocks, one RTC output, and one 25MHz reference clock • Selectable input reference: crystal oscillator interface or differential LVPECL input • • • • • • Output Frequency Range: 25MHz - 200MHz • • • Serial Interface: I2C programmable Frequency Margining in