ICS9112-33

Integrated Circuit Systems, Inc. S a General atDescription The ICS9112-33/34 are high-speed clock generators designed .D to support fibre channel system requirements. The ICS9112w 33/34 w generates 106.25 MHz from a 21.25 MHz crystal. wAn exact frequency multiplying ratio ensures better than ±100 ppm frequency accuracy using a standard AT crystal The ICS9112-33/34 with less than 25ps accumulative jitter is well suited for Fibre Channel applications. Crystal: EC-21.25M (Ecliptek) Frequency h Generator for Fibre Channel Systems Features Generates 106.25 MHz clocks from a 21.25 MHz crystal Less than 45ps one sigma jitter (10ps typ.) Less than ±130ps absolute jitter Less than 25ps accumulative jitter @ 256 cycles Rise/fall times less than 1.2ns driving 15pF On-chip loop filter components 3.0V-5.5V supply range 8-pin, 150-mil SOIC package t e e 4U . m o c ICS9112-33/34 Preliminary Product Preview with external load capacitors (typically 33pF±5% for an 18pF load crystal). Achieving ±100 ppm over four years requires the crystal to have a ±20 ppm initial accuracy, ±30 ppm temperature and ±5 ppm/year aging coefficients. Applications Specifically designed to support the high-speed clocking requirements of fibre channel systems. Block Diagram w w w .D t a S a e h t e U 4 .c m o ICS9112-33/34 Rev D 3/3/99 PRODUCT PREVIEW documents contain information on new products in the sampling or preproduction phase of development. Characteristic data and ot...