ICS9112-32

Integrated Circuit Systems, Inc. S a General atDescription The ICS9112-31/32 are high-speed clock generators designed .D to support fibre channel system requirements. The ICS9112w 31/32 w generates 106.25 MHz from a 25 MHz crystal. wAn exact frequency multiplying ratio ensures better than ±100 ppm frequency accuracy using a standard AT crystal 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. The ICS9112-31/32 with less than 25ps accumulative jitter is well suited for Fibre Channel applications. Frequency h Generator for Fibre Channel Systems Features Generates 106.25 MHz clocks from a 25 MHz crystal Less than 45ps one sigma jitter (15ps 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 ICS9112-31/32 Preliminary Product Preview 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 9112-31 9112-32 Rev D 3/2/99 PRODUCT PREVIEW documents contain information on new products in the sampling or preproduction phase of development. Characteristic data and other specifications are subject to ...