ICS841S01 Datasheet | Integrated Device Technology

.. PRELIMINARY PCI EXPRESS™ CLOCK GENERATOR GENERAL DESCRIPTION The ICS841S01 is a PLL-based clock generator IC S specifically designed for PCI_Express™Clock Hi Per Clock S™ Generation applications. This device generates a 100MHz HCSL clock. The device offers a HCSL (Host Clock Signal Level) clock output from a clock input reference of 25MHz. The input reference may be derived from an external source or by the addition of a 25MHz crystal to the on-chip crystal oscillator. An external reference may be applied to the XTAL_IN pin with the XTAL_OUT pin left floating. The device offers spread spectrum clock output for reduced EMI applications. An I2C bus interface is used to enable or disable spread spectrum operation as well as select either a down spread value of -0.35% or -0.5%. The ICS841S01 is available in both standard and lead-free 16-Lead TSSOP packages. Features - One 0.7V current mode differential HCSL output pair - Crystal oscillator interface, 25MHz - Output frequency: 100MHz - RMS period jitter: 3ps (maximum) - Cycle-to-cyle jitter: 35ps (maximum) - I2C support with readback capabilities up to 400k Hz - Spread Spectrum for electromagnetic interference (EMI) reduction - 3.3V operating supply mode - 0°C to 70°C ambient operating temperature - Available in both standard (Ro HS 5) and lead-free (Ro HS 6) packages BLOCK DIAGRAM 25MHz PIN ASSIGNMENT PLL Divider Network SRCT0 SRCC0 XTAL_IN XTAL_OUT SDATA Pullup SCLK Pullup I2C Logic VSS_SRC VDD_SRC SRCT0 SRCC0 VDD_SRC VSS_SRC IREF VSSA 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VDD_SRC SDATA SCLK XTAL_OUT XTAL_IN VDD_REF VSS_REF VDDA IREF 16-Lead TSSOP 4.4mm x 5.0mm x 0.92mm package body G Package Top...