843011CG www.icst.com/products/hiperclocks.html REV. A JANUARY 25, 2006
1
Integrated
Circuit
Systems, Inc.
ICS843011C
FEMTOCLOCKS™ C RYSTAL-TO-
3.3V LVPECL CLOCK GENERATOR
PRELIMINARY
GENERAL DESCRIPTION
The ICS843011C is a Fibre Channel Clock
Generator and a member of the HiPerClocks
TM
family of high performance devices from ICS.
The ICS843011C uses a 26.5625MHz crystal to
synthesize 106.25MHz or a 25MHz crystal to
synthesize 100MHz. The ICS843011C has excellent <1ps
phase jitter performance, over the 637kHz – 10MHz
integration range. The ICS843011C is packaged in a small
8-pin TSSOP, making it ideal for use in systems with limit-
ed board space.
FEATURES
• One differential 3.3V LVPECL output
• Crystal oscillator interface designed for 26.5625MHz
18pF parallel resonant crystal
• Output frequency: 106.25MHz or 100MHz
• VCO range: 560MHz - 680MHz
• RMS phase jitter @ 100MHz, using a 25MHz crystal
(637kHz - 10MHz): 0.29ps (typical)
• 3.3V operating supply
• -40°C to 85°C ambient operating temperature
• Available in both standard and lead-free RoHS compliant
packages
HiPerClockS™
ICS
FREQUENCY TABLE
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5265.6252.601
52001
ICS843011C
8-Lead TSSOP
4.40mm x 3.0mm x 0.925mm package body
G Package
Top View
VCCA
VEE
XTAL_OUT
XTAL_IN
1
2
3
4
VCC
Q
nQ
nc
8
7
6
5
OSC
Phase
Detector
VCO
637.5MHz w/
26.5625MHz Ref.
M = ÷24 (fixed)
÷6
BLOCK DIAGRAM PIN ASSIGNMENT
Q
nQ
XTAL_IN
XTAL_OUT
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.