The ICS844001I is a Fibre Channel Clock
ICS Generator and a member of the HiPerClocksTM
HiPerClockS™ family of high performance devices from ICS.
The ICS844001I uses an 18pF parallel resonant
crystal over the range of 20.4MHz - 28.3MHz.
For Fibre Channel applications, a 26.5625MHz crystal is used.
The frequency select pin allows the device to generate
either 106.25MHz or 212.5MHz from a 26.5625MHz
cr ystal. To generate 187.5MHz for 12Gb Ethernet, a
23.4375MHz crystal is used. The ICS844001I uses ICS’ 3rd
generation low phase noise VCO technology and can
achieve <1ps typical rms phase jitter, easily meeting Fibre
Channel and Ethernet jitter requirements. The ICS844001I is
packaged in a small 8-pin TSSOP, making it ideal for use in
systems with limited board space.
• (1) Differential LVDS output
• Crystal oscillator interface, 18pF parallel resonant crystal
(20.4MHz - 28.3MHz)
• Output frequency range: 81.66MHz - 226.66MHz
• VCO range: 490MHz - 680MHz
• RMS phase jitter @ 106.25MHz, using a 26.5625MHz crystal
(637kHz - 10MHz): 0.74ps (typical)
• 3.3V or 2.5V operating supply
• -40°C to 85°C ambient operating temperature
COMMON CONFIGURATION TABLE - FIBRE CHANNEL, 12Gb ETHERNET
Crystal Frequency (MHz) FREQ_SEL
490MHz - 680MHz
M = ÷24 (fixed)
4.40mm x 3.0mm x 0.925mm
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial
product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.
REV. A JUNE 16, 2005