ICS84329-01B Datasheet, PDF (11/19 Pages) Integrated Circuit Systems – 700MHZ, LOW JITTER, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
ICS84329B-01
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
LAYOUT GUIDELINE
The schematic of the ICS84329B-01 layout example used in
this layout guideline is shown in Figure 6A. The ICS84329B-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.
C1
0. 1uF
VCC=3.3 V
SP = Space (i .e. n ot i ntstal le d)
M [8 :0 ]= 11 001 0000 (40 0)
N[1:0 ] =0 1 (Di vi de b y 2)
M4
M5
M6
M7
M8
N2
12
13
14
15
16
17
M4
M5
M6
M7
M8
N1
18
N0
N1
16MH z, 18pF
X1
XTALIN
nc
nc
VCCA
S_LOAD
4
3
2
1
28
27
S_D ATA
S_CLOCK
26
C3
22p
VCC
C4
R7
22p
10
VC C A
C11
0. 01u
C16
10u
RU0
SP
RU1
SP
VCC
U1
84329BV_01
RU7
1K
RU8
1K
RU9
SP
RU10 RU11
1K
SP
C2
0.1u
RD0
1K
RD1
1K
RD7
SP
RD8
SP
RD9
1K
RD10 RD6
SP
1K
C1
0.1uF
Zo = 50 Ohm
Fout = 200 M Hz
Zo = 50 Ohm
R2
R1
50
50
R3
50
FIGURE 6A. SCHEMATIC OF RECOMMENDED LAYOUT
84329BM-01
www.icst.com/products/hiperclocks.html
11
REV. A JUNE 10, 2005