ICS9169A-70 Datasheet | Integrated Circuit Systems

.. Integrated Circuit Systems, Inc. Frequency Generator for Workstation Systems General Description The ICS9169A-70 is a low-cost frequency generator designed specifically for workstation or PC system clocks. The integrated buffer minimizes skew and provides all the clocks required. A 14.318 MHz XTAL oscillator provides the reference clock to generate standard Pentium frequencies. The CPU clock makes gradual frequency transitions without violating the PLL timing of internal microprocessor clock multipliers. Features - - - - - - - - - 9 PCI outputs selectable from 30 to 66.6MHz 3 SCSI outputs, selectable from 10 to 80MHz 500ps skew window for all synchronous clock edges Integrated buffer outputs drive up to 30p F loads 500ps output to output skew window Buffers drive 30p F loads nominally 0.8V/ns skew rate 3.0V - 3.7Vsupply range 32-pin SOIC package 48 MHz clock for USB support and 24 MHz clock for FD Data Shee . Pin Configuration Block Diagram 32-Pin SOIC . 9169A-70 Rev B 2/14/01 ICS reserves the right to make changes in the device data identified in this publication without further notice. ICS advises its customers to obtain the latest version of all device data to verify that any information being relied upon by the customer is current and accurate. .. Pin Descriptions PIN NUMBER 1 2 PIN NAME VDD1 X1 TYPE PWR IN DESCRIPTION Power for logic, PLL and output buffers. XTAL or external reference frequency input. This input includes XTAL load capacitance and feedback bias for a 12-16 MHz crystal, nominally 14.31818 Mhz. XTAL output which includes XTAL load capacitance. PCI clock outputs Ground for logic, PLL and output buffers. Power for PCI clock outputs Frequency multiplier select pins. See table above. These inputs have internal pull up devices. Power for SCSI clock outputs SCSI clock outputs page. These inputs have internal pull up devices REF is a buffered copy of the...