84330AV-02
www.idt.com
REV. B JULY 25, 2010
10
ICS84330-02
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
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-
LAYOUT GUIDELINE
FIGURE 6A. SCHEMATIC OF RECOMMENDED LAYOUT
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.
M8
N1
M3
N2
U1
ICS84330-02
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
27
26
25
24
23
22
21
28
VCCA
FREF_EXT
XTAL_SEL
X_IN
X_
O
U
T
OE
nP
_L
O
A
D
M0
M1
M2
M3
M4
M5
M6
M7
M8
N0
N1
VEE
T
EST
S_DATA
S_CLOCK
VC
C
FO
U
T
nF
O
U
T
VEE
VC
C
S_LOAD
Zo = 50 Ohm
RD1
1K
Fout = 200 M Hz
RU7
1K
VC
C
M1
M4
RU1
SP
OE
M8
C16
10u
N0
RD0
1K
M1
RD10
SP
RD12
SP
RU9
SP
M5
RU8
1K
R2
50
VCC
C1
SP
C3
0.1uF
M7
C4
0.1u
RD7
SP
VCC
RD6
1K
nP
LO
A
D
SP = Space (i.e. not i ntstalled)
M6
C11
0.01u
VCCA
M0
RD8
SP
N[1:0] =00 (Divide by 2)
M0
R7
10
RU0
SP
RD9
1K
M [8 :0]= 11001 0000 (400 )
+
-
Zo = 50 Ohm
M7
M2
R3
50
R1
50
X1
16MHz, 18pF
OE
RU11
SP
C2
SP
N1
RU12
1K
nP
Load
VCC=3.3V
RU10
1K