ICS84330CI Datasheet, PDF (11/20 Pages) Integrated Circuit Systems – 720MHZ, LOW JITTER, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER

ICS84330CI Data Sheet
720MHZ, CRYSTAL-TO-LVPECL FREQUENCY SYNTHESIZER
Layout Guideline
The schematic of the ICS84330CI layout example used in this layout
guideline is shown in Figure 6A. The ICS84330CI recommended
PCB board layout for this example is shown in Figure 6B. This layout
example is used as a general guideline. 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
SP = Space (i.e. not intstalled)
M [8:0]= 110010000 (400)
N[1:0] =00 (Divide by 2)
M4
M5
M6
M7
12
13
14
15
M4
M5
M6
M8
16 ^M7
N2
N1
17
18
M8
N0
N1
U1
ICS84330
VCC
RU0
SP
RU1
SP
RU7
1K
RU8
1K
RU9
SP
RU10 RU11 RU12
1K
SP
1K
C4
0.1u
RD0
1K
RD1
1K
RD7
SP
RD8
SP
RD9
1K
RD10 RD6
SP
1K
RD12
SP
Figure 6A. ICS84330CI Schematic of Recommended Layout
VCC
X_IN
XTAL_SEL
FREF_EXT
4
3
2
1
VCCA ₂₈
S_LOAD
S_DATA
S_CLOCK
27
26
R7
10
VCCA
C11
0.01u
C16
10u
C3
0.1uF
Zo = 50 Ohm
Fout = 200 MHz ₊
Zo = 50 Ohm
-
R2
R1
50
50
R3
50
ICS84330CVI REVISION A JANUARY 7, 2011
11
©2011 Integrated Device Technology, Inc.