ICS84330-02 Datasheet, PDF (10/17 Pages) Integrated Circuit Systems – 700MHZ, LOW JITTER, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
ICS84330-02
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
LAYOUT GUIDELINE
The schematic of the ICS84330-02 layout example used in
this layout guideline is shown in Figure 6A. The ICS84330-02
recommended PCB board layout for this example is shown
in Figure 6B. This layout example is used as a general guide-
line. The layout in the actual system will depend on the
selected component types, the density of the components,
the density of the traces, and the stack up of the P.C. board.
SP ^C1
X1
C2
16MHz, 18pF
SP
VCC=3.3V
S P = S p a ce (i .e . n o t in tsta ll e d )
M [8:0]= 11001000 0 (400)
N[1:0] =00 (Di vi de by 2)
VCC
M4
12
M5
M6
13
14
M4
M5
M7
M8
N2
N1
15
16
17
18
M6
M7
M8
N0
N1
U1
ICS84330-02
RU0
SP
RU1
SP
RU7
1K
RU8
1K
RU9
SP
RU10
1K
RU11
SP
RU12
1K
C4
0. 1u
RD0
1K
RD1
1K
RD7
SP
RD8
SP
RD9
1K
RD10 RD6
SP
1K
RD12
SP
VCC
4
X_I N
XTAL_SEL
3
2
FREF_EXT
VCCA
S_LOAD
S_DATA
S_CLOCK
1
28
27
26
R7
10
VCCA
C11
0.01u
C16
10u
C3
0. 1uF
Zo = 50 Ohm
Fout = 200 M Hz ₊
Zo = 50 Ohm
-
R2
R1
50
50
R3
50
FIGURE 6A. SCHEMATIC OF RECOMMENDED LAYOUT
84330AV-02
www.icst.com/products/hiperclocks.html
10
REV. A MAY 31, 2005