ICS843051 Datasheet, PDF (1/15 Pages) Integrated Circuit Systems – FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR

Integrated
Circuit
Systems, Inc.
ICS843051
FEMTOCLOCKS™ CRYSTAL-TO-
3.3V LVPECL CLOCK GENERATOR
GENERAL DESCRIPTION
ICS
The ICS843051 is a Gb Ethernet Generator and a
member of the HiPerClocks^TM family of high
HiPerClockS™ _{performance devices from ICS.The ICS843051 can}
synthesize 10 Gigabit Ethernet, SONET, or Serial
ATA reference clock frequencies with the
appropriate choice of crystal and output divider.The ICS843051
has excellent phase jitter performance and is packaged in a
small 8-pin TSSOP, making it ideal for use in systems with
limited board space.
FEATURES
• 1 differential 3.3V LVPECL output
• Crystal oscillator interface designed for
18pF parallel resonant crystals
• RMS phase jitter at:
155.52MHz (12KHz - 20MHz): 0.74ps (typical)
156.25MHz (1.875MHz - 20MHz): 0.43ps (typical)
161.13MHz (1.933MHz - 20MHz): 0.43ps (typical)
• RMS phase noise at 156.25MHz
Offset
Noise Power
100Hz .................. -95 dBc/Hz
1KHz ................ -110 dBc/Hz
10KHz ................ -125 dBc/Hz
100KHz ................ -125 dBc/Hz
• 3.3V operating supply
• 0°C to 70°C ambient operating temperature
• Industrial temperature information available upon request
• Lead-Free package fully RoHS compliant
FREQUENCY TABLE
Inputs
Crystal Frequency (MHz)
20.141601
20.141601
19.53125
19.53125
19.44
19.44
18.75
18.75
FREQ_SEL
0
1
0
1
0
1
0
1
Output Frequency
(MHz)
161.132812
80.566406
156.25
78.125
155.52
77.76
150
75
PIN ASSIGNMENT
VCCA 1
VEE 2
XTAL_OUT 3
XTAL_IN 4
8 VCC
7 Q0
6 nQ0
5 FREQ_SEL
ICS843051
8-Lead TSSOP
4.40mm x 3.0mm x 0.925mm
package body
G Package
Top View
BLOCK DIAGRAM
XTAL_IN
XTAL_OUT
OSC
843051AG
Phase
Detector
VCO
FREQ_SEL
0 ÷4 (default)
1 ÷8
÷32
(fixed)
www.icst.com/products/hiperclocks.html
1
nQ0
Q0
REV. A DECEMBER 14, 2004