ICS840N202I Datasheet, PDF (26/31 Pages) Integrated Device Technology – Fourth generation FemtoClock

ICS840N202I Data Sheet
FemtoClock® NG Universal Frequency Translator
3. 3V
FB1
C13
0 .1 u F
m uR at a, BLM18BB221SN 1
C14
10uF
3. 3V
FB2
C8
0 .1 u F
m uR at a, BLM18BB221SN 1
C9
10uF
VD D
C15
0 .1 u F
VD D O
C10
0 .1 u F
VD D
C4
0.1uF
C5
0 .1 u F
C6
0. 1uF
C7
0. 1uF
FB3
Fox 325BS crystal
1
XTAL_I N
BLM18B B221S N 1
C 11
C 12
R1
10 u F
0. 1uF
2
C1
5 pF
C LK0
L VDS I np ut
E xam pl e
( See N ot e 3)
nC LK0
4
X2
3
C2
5pF
R5
1 00
VD D
16MHz to 40 MHz
(12pf)
U1
XTA L_OU T
1
2 ^{XTA L_I N}
(Note 1)
(Note 2)CLK _S EL
XTA L_OU T
4
5 ^{C LK _S EL}
6 ^{C LK 0}
9 ^{C LK 0}
10 ^{C LK 1}
UFT
(Note 1)
C LK 1
(Note 2)^{PLL_B Y PAS S}
(Note 1)S_A0
12
18
PLL_B Y PAS S
(Note 1)S_A1
SC LK
17 ^S_A0
15 ^S_A1
SD ATA
14 ^{SC LK}
(Note 1)^{CON F IG}
(Note 2)
16 ^{SD ATA}
C ON F IG
R9
R1 0
125
12 5
R11
R12
4. 7K
4 .7 K
43
Q0
O E0
Q1
O E1
LOC K_I N D
C LK_A CTI VE
HOLD OVE R
C LK0BA D
C LK1BA D
XTALBA D
LF1
LF0
26
28
O E0
(Note 1)
24
22
O E1
30 ^(NotLO^eCK_¹IN⁾D
31
CLK_ACT IVE
R4
37
HOLDOVER
38
CLKBAD
39
CLK1BAD
40
XT AL BAD
43
34
3- pole loop filter
33
R3
22 0 K
C3
0. 001uF
Rs
4 7 0K
C LK1
P ECL I np ut
E xam pl e
( See N ot e 3)
VDD
Cp
Cs
0. 001uF
1 uF
Zo = 50 Ohm
3. 3V LV C MOS /LV TTL
Zo = 50 Ohm
3. 3V LV C MOS /LV TTL
nCLK 1
R 14
R15
84
84
2-pole loop filter - (opt ional)
LF1
LF0
Rs1 470K
Cp 1
Cs1
0 .0 0 1 u F
1uF
Logic I np ut Pin Ex am ple s
V D D _{Set Logic}
Input to '1'
RU1
1K
To Logic
Input pins
RD1
No t In stalle d
VD D _{Set Logic}
Input to '0'
RU2
Not In stalle d
To Logic
Input pins
RD2
1K
Note s
Note 1: CE0, OE1, CLK_SEL, PLL_BY PASS, S_A0 and S_A1 are
digit al control inputs. If external pull-up/ down needed, see "Logic
Input Pin Examples" shown at left. Please note t hat OE0 and OE1
are internally pulled up so no external pull-ups are required to enable
them.
Note 2: CLK_SEL, PLL_BYPASS and CONF IG are internally pulled
down. No ext ernal com pononents required to select default
condit ion.
Note 3: Ot her configurations are supported. Please contact IDT for
details.
Figure 8. ICS840N202I Application Schematic
ICS840N202CKI REVISION A NOVEMBER 1, 2013
26
©2013 Integrated Device Technology, Inc.