
ICS843002I-41
700MHZ, FEMTOCLOCK VCXO BASED SONET/SDH JITTER ATTENUATOR
IDT / ICS VCXO BASED SONET/SDH JITTER ATTENUATOR
2
ICS843002AKI-41 REV. B
APRIL 7, 2009
Block Diagram
R Divider =
1, 2, 4, 8,
16 or 32
CLK1
nCLK1
Activity
Detector
CLK0
nCLK0
Activity
Detector
LOR1
LOR0
R_SEL2:0
3
ISET
CLK_SEL
FemtoClock
PLL
x32
622.08 MHz
V
CCO_PECL
QA
nQA
Cx Divider =
1,2,4,8,16,32,
HiZ or Disable
QB
nQB
QB_SEL2:0
QA_SEL2:0
3
VCXO
Charge
Pump
and Loop
Filter
External
Loop
Components
19.44 MHz
Pullable
xtal
19.44 MHz
XT
AL_IN
XT
AL_OUT
LF1
LF0
Divide
by 32
Divide
by 32
VCXO Jitter Attenuation PLL
Phase
Detector
ICS843002I-41
110
111
V
CCO_LVCMOS
1
0
Cx Divider =
1,2,4,8,16,32,
HiZ or Disable
NOTE: 19.44MHz VCXO crystal shown is typical for SONET/SDH device applications.