ICS8432-51K

PRELIMINARY Integrated Circuit Systems, Inc. www.DataSheet4U.com ICS8432-51K 700MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER FEATURES Dual differential 3.3V LVPECL outputs Selectable crystal oscillator interface or LVCMOS/LVTTL TEST_CLK Output frequency range: 31.25MHz to 700MHz Crystal input frequency range: 12MHz to 25MHz VCO range: 250MHz to 700MHz Parallel or serial interface for programming counter and output dividers RMS period jitter: 3.5ps (maximum) Cycle-to-cycle jitter: 25ps (maximum) 3.3V supply voltage 0°C to 70°C ambient operating temperature Replaces the ICS8432-01 GENERAL DESCRIPTION The ICS8432-51K is a general purpose, dual output Crystal-to-3.3V Differential LVPECL High FreHiPerClockS™ quency Synthesizer and a member of the HiPerClockS™ family of High Performance Clock Solutions from ICS. The ICS8432-51K has a selectable TEST_CLK or crystal input. The VCO operates at a frequency range of 250MHz to 700MHz. The VCO frequency is programmed in steps equal to the value of the input reference or crystal frequency. The VCO and output frequency can be programmed using the serial or parallel interface to the configuration logic. The low phase noise characteristics of the ICS8432-51K make it an ideal clock source for Gigabit Ethernet, Fibre Channel 1 and 2, and Infiniband applications. ICS BLOCK DIAGRAM VCO_SEL PIN ASSIGNMENT VCO_SEL nP_LOAD XTAL1 M4 M3 M2 M1 M0 XTAL_SEL TEST_CLK XTAL1 OSC XTAL2 0 1 32 31 30 29 28 2...