ICS813252I-02 Datasheet, PDF (2/22 Pages) Integrated Device Technology – VCXO JITTER ATTENUATOR & FEMTOCLOCK™ MULTIPLIER

ICS813252I-02
VCXO JITTER ATTENUATOR & FEMTOCLOCK™ MULTIPLIER
BLOCK DIAGRAM
Loop
Filter
PDSEL_[2:0]
Pullup
CLK0
nCLK0
0
CLK1
nCLK1
CLK_SEL
1
Pulldown
VCXO Input
Pre-Divider
000 = 1
001 = 193
010 = 256
011 = 2430
100 = 3125
101 = 9720
110 = 15625
111 = 19440
(default)
25MHz
Phase
Detector
Charge
Pump
VCXO
VCXO Feedback Divider
÷3125
VCXO Jitter Attenuation PLL
FemtoClock PLL
625MHz
Output Divider
00 = 25 (default)
01 = 5
10 = 4
11 = 2
2
Output Divider
00 = 25 (default)
01 = 5
10 = 4
11 = 2
2
QA
nQA
ODASEL_[1:0]
QB
nQB
ODBSEL_[1:0]
IDT^™ / ICS^™ VCXO JITTER ATTENUATOR/MULTIPLIER
2
CS813252CKI-02 REV. A OCTOBER 22, 2008