ICS843001I-23 Datasheet, PDF (17/24 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER

ICS843001I-23 Data Sheet
FEMTOCLOCK^® CRYSTAL/LVCMOS-TO-LVPECL/LVCMOS FREQUENCY SYNTHESIZER
U1
VCCO
VC C O
VCC
R4
10
VCCA
C6
C4
0.1u
10u
VC C
N0
N1
N2
Q
nQ
XTA L_O U T1
XTAL_I N 1
1
24
2
3
4
5
6
7
V CCO_LV CMOS RE F_OUT
N0
VE E
N1
O E_R E F
N2
M2
V C C O_LV PE C L
M1
Q
M0
23
22
21
20
19
18
OE _R E F
M2
M1
M0
MR
8
9
10
11
12
nQ
V EE
VCCA
VCC
XTA L_OU T1
XTA L_IN 1
MR
S EL1
S EL0
CLK
XTA L_I N 0
XTAL_OU T0
17
16
15
14
13
SE L1
SE L0
CLK
XTAL_I N 0
XTA L_O U T0
C3
X1
18pF
22pF
17. 5MH z - 29.54MH z
C5
22 p F
C2
22pF
1 8 p F ^X2
17.5MHz - 29.54MHz
C1
22pF
Logic Control Input Examples
VCC ^{Set Logic}
Input to
'1'
R U1
1K
VCC ^{Set Logic}
Input to
'0'
RU2
N ot I ns t all
To Logic
Input
pins
R D1
N ot I ns t all
To Logic
Input
pins
RD2
1K
VDD
Q1
Ro ~ 7 Ohm R 9
Z o = 50 Ohm
43
D riv er_LVC MO S
3.3V
m urAt a, BLM18B B221S N 1
1
2
(U1:10)
VCC
F B1
C7
0.1uF
C8
C9
10uF 0.1uF
3.3V
m urAt a, BLM18B B221S N 1
1
2
(U1:1)
F B2
C10
0.1uF
C 11
C12
10uF 0.1uF
(U1:5)
C 13
0. 1uF
VCCO
RE F_O UT
R1
33 Z o = 50 Ohm
Zo = 50 Ohm
Q
TL2
Zo = 50 Ohm
/Q
TL3
V CC=3.3V
V CCO_LV CMOS=3.3V
V CCO_LV PECL=3.3V
3.3V
LV CMOS
R2
R3
133
133
+
-
R5
R6
82.5
82.5
Zo = 50 O hm
Q
Zo = 50 O hm
/Q
Optional
LVPECL
Y-Termination
+
-
R7
R8
50
50
R10
50
Figure 6. ICS843001I-23 Layout Example
ICS843001CGI-23 REVISION A OCTOBER 4, 2011
17
©2011 Integrated Device Technology, Inc.