ICS8430-71B Datasheet, PDF (10/16 Pages) Integrated Circuit Systems – 700MHZ, LOW JITTER, CRYSTAL INTERFACE / LVCMOS-TO-3.3V LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS8430B-71
700MHZ, LOW JITTER, CRYSTAL INTERFACE/
LVCMOS-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
LAYOUT GUIDELINE
The schematic of the ICS8430B-71 layout example used in
this layout guideline is shown in Figure 5A. The ICS8430B-71
recommended PCB board layout for this example is shown in
Figure 5B. 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.
U1
1
2
M5
3
4
5
6
7
M6
M7
M8
N0
N1
8
N2
VEE
ICS8430B-71
C14
0.1u
C1
C2
X1
VCC
X_OUT
24
23
TEST_CLK
XTAL_SEL
VCCA
S_LOAD
22
21
20
19
S_DATA ₁₈
S_CLOCK
MR
17
REF_IN
XTAL_SEL
S_LOAD
S_DATA
S_CLOCK
VCCA
C11
0.01u
R7
10
C16
10u
C15
0.1u
Zo = 50 Ohm
IN+
TL1
Zo = 50 Ohm
IN-
TL2
VCC
R1
R3
125
125
+
-
R2
R4
84
84
FIGURE 5A. SCHEMATIC OF RECOMMENDED LAYOUT
8430BY-71
www.icst.com/products/hiperclocks.html
10
REV. A SEPTEMBER 20, 2005