ICS843002I-41 Datasheet, PDF (2/21 Pages) Integrated Circuit Systems – 700MHz, FEMTOCLOCKS-TM VCXO BASED SONET/SDH JITTER ATTENUATOR

Integrated
Circuit
Systems, Inc.
BLOCK DIAGRAM
PRELIMINARY
ICS843002I-41
700MHZ, FEMTOCLOCKS™ VCXO BASED
SONET/SDH JITTER ATTENUATOR
External
Loop
Components
19.44 MHz
Pullable
xtal
ICS843002-41
ISET
LF0
LF1
V_{CCO_LVCMOS}
CLK1
nCLK1
LOR1
CLK0
nCLK0
LOR0
CLK_SEL
R_SEL2:0 ³
Activity
Detector
1
0
Activity
Detector
R Divider =
1, 2, 4, 8,
16 or 32
Divide
by 32
Phase
Detector
Charge
Pump
and Loop
Filter
VCXO
19.44 MHz
Divide
by 32
VCXO Jitter Attenuation PLL
622.08 MHz
110
FemtoClock
PLL
111
110
x32
Cx Divider =
1,2,4,8,16,32,
HiZ or Disable
111
Cx Divider =
1,2,4,8,16,32,
HiZ or Disable
V_{CCO_PECL}
QA
nQA
3 _{QA_SEL2:0}
QB
nQB
3 _{QB_SEL2:0}
NOTE 1: 19.44MHz VCXO crystal shown is typical for SONET/SDH device applications.
843002AKI-41
www.icst.com/products/hiperclocks.html
2
REV. A JUNE 1, 2005