ICS84329B Datasheet, PDF (10/19 Pages) Integrated Circuit Systems – 700MHZ, LOW JITTER, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
ICS84329B
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
LAYOUT GUIDELINE
The schematic of the ICS84329B layout example used in this
layout guideline is shown in Figure 5A. The ICS84329B recom-
mended 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 compo-
nent types, the density of the components, the density of the
traces, and the stack up of the P.C. board.
VCC=3.3V
S P = S p ace (i .e. n ot i ntstal l e d)
M [8 :0]= 11 00 1 00 0 0 (40 0 )
N[1 :0 ] =01 (Di vid e by 2)
M4
M5
M6
M7
12
13
14
15
M4
M5
M6
M8
N2
N1
16
17
18
M7
M8
N0
N1
U1
84329BV
VCC
RU0
SP
RU1
SP
RU7
1K
RU8
1K
RU9
SP
RU10 RU11 RU12
1K
SP
1K
C2
0.1u
RD0
1K
RD1
1K
RD7
SP
RD8
SP
RD9
1K
RD10 RD6
SP
1K
RD12
SP
16MHz,18pF
X1
XTALIN
nc
nc
4
3
2
1
VCCA
S_LOAD
S_DATA
28
27
26
S_CLOCK
C3
22p
VCC
C4
R7
22p
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 5A. SCHEMATIC OF RECOMMENDED LAYOUT FOR 28 LEAD PLCC
84329BV
www.icst.com/products/hiperclocks.html
10
REV. B JANUARY 18, 2006