ICS84329-01 Datasheet, PDF (11/20 Pages) Integrated Device Technology – 700MHZ, LOW JITTER, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER

ICS84329-01
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
LAYOUT GUIDELINE
The schematic of the ICS84329-01 layout example used in
this layout guideline is shown in Figure 6A. The ICS84329-01
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 com-
ponent types, the density of the components, the density of the
traces, and the stack up of the P.C. board.
C3
0.1u
16MHz
X1
VCC
VCC=3.3V
SP = Space (i.e. not intstalled)
M[8:0]= 110010000 (400)
N[1:0] =01 (Divide by 2)
RU0
SP
RU1
SP
VCC
RU7
1K
RU8
1K
RU9
SP
RU10 RU11
1K
SP
RD0
1K
RD1
1K
RD7
SP
RD8
SP
RD9
1K
RD10 RD6
SP
1K
M4
M5
12
13
M4
M6
14 ^M5
M7
M8
N2
15
16
17
M6
M7
M8
N1
18 ^N0
N1
U1
84329_01_PLCC
C2
0.1u
XTAL1
4
3
nc ₂
nc
VCCA
S_LOAD
1
28
27
S_DATA ₂₆
S_CLOCK
R7
10
VCCA
C11
0.01u
C16
10u
C1
0.1uF
Zo = 50 Ohm
Fout = 200 MHz
Zo = 50 Ohm
R2
R1
50
50
R3
50
FIGURE 6A. SCHEMATIC OF RECOMMENDED LAYOUT
84329AM-01
www.idt.com
11
REV. D AUGUST 7, 2010