ICS84330C Datasheet, PDF (10/19 Pages) Integrated Circuit Systems – 700MHZ, LOW JITTER, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
ICS84330C
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
LAYOUT GUIDELINE
The schematic of the ICS84330C layout example used in
this layout guideline is shown in Figure 6A. The ICS84330C
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
U1
VCC=3.3V
SP = Spa ce (i .e. no t i n tsta l l e d)
M [8 :0 ]= 1 10 01 00 00 (40 0)
N[1:0] =00 (Di vi de by 2 )
M4
M5
M6
12
13
14
M4
M5
M7
15 ^M6
M8
16 ^M7
N2
N1
17
18
M8
N0
N1
ICS84330
VCC
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
XTAL1
XTAL_SEL
FREF_EXT
4
3
2
1
VCCA ₂₈
S_LOAD
S_DATA
S_CLOCK
27
26
VCC
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
84330CV
www.icst.com/products/hiperclocks.html
10
REV. B DECEMBER 7, 2004