ICS84314-02 Datasheet, PDF (12/17 Pages) Integrated Circuit Systems – 700MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS84314-02
700MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL
FREQUENCY SYNTHESIZER W/FANOUT BUFFER
LAYOUT GUIDELINE
The schematic of the ICS84314-02 layout example used in
this layout guideline is shown in Figure 6A. The ICS84314-02
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 component types, the density of the components,
the density of the traces, and the stack up of the P.C. board.
VCC
VCCO
C5
0.1u
C4
0.1u
VCC=3.3V
VCCO=3.3V
C1
U1
1
2
3
4
5
M4
M5
M6
M7
6
7
8
M8
VEE
VCC
VCCO
X1
C2
ICS84314_02
VCCO
T_CLK
XTAL_SEL
VCCA
S_LOAD
24
23
22
21
20
S_DATA
S_CLOCK
MR
19
18
17
VCCO
VCC
VCCA
C11
0.01u
R7
10
C16
10u
C3
0.1u
Zo = 50 Ohm
Logic Input Pin Examples
Set Logic
VCC _{Input to}
'1'
RU1
1K
To Logic
Input
pins
RD1
Not Install
Set Logic
VCC _{Input to}
'0'
RU2
Not Install
To Logic
Input
pins
RD2
1K
+
Zo = 50 Ohm
-
R2
R1
50
50
C6 (Option)
R3
0.1u
50
Zo = 50 Ohm
Zo = 50 Ohm
+
-
R5
R4
50
50
C7 (Option)
R6
0.1u
50
FIGURE 6A. SCHEMATIC OF 3.3V/3.3V RECOMMENDED LAYOUT
84314AY-02
www.icst.com/products/hiperclocks.html
12
REV. B NOVEMBER 17, 2005