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Integrated Device Technology - CYRSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER

Numéro de référence ICS8432I-51
Description CYRSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
Fabricant Integrated Device Technology 
Logo Integrated Device Technology 





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ICS8432I-51 fiche technique
700wMwwH.DZata,SCheYet4RU.ScoTmAL-TO-3.3V DIFFERENTIAL
LVPECL FREQUENCY SYNTHESIZER
ICS8432I-51
GENERAL DESCRIPTION
The ICS8432I-51 is a general purpose, dual out-
ICS put Crystal-to-3.3V Differential LVPECL High Fre-
HiPerClockS™ q u e n c y S y n t h e s i z e r a n d a m e m b e r o f t h e
HiPerClockS™ family of High Performance Clock
Solutions from IDT. The ICS8432I-51 has a select-
able REF_CLK or crystal input. The VCO operates at a fre-
quency range of 250MHz to 700MHz. The VCO frequency is
programmed in steps equal to the value of the input reference
or crystal frequency. The VCO and output frequency can be
programmed using the serial or parallel interface to the con-
figuration logic. The low phase noise characteristics of the
ICS8432I-51 make it an ideal clock source for Gigabit Ethernet,
Fibre Channel 1 and 2, and Infiniband applications.
FEATURES
Dual differential 3.3V LVPECL outputs
Selectable crystal oscillator interface or
LVCMOS/LVTTL TEST_CLK
Output frequency range: 31.25MHz to 700MHz
Crystal input frequency range: 12MHz to 25MHz
VCO range: 250MHz to 700MHz
Parallel or serial interface for programming counter and
output dividers
RMS period jitter: 3.5ps (maximum)
Cycle-to-cycle jitter: 40ps (maximum)
3.3V supply voltage
-40°C to 85°C ambient operating temperature
Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
BLOCK DIAGRAM
PIN ASSIGNMENT
VCO_SEL
XTAL_SEL
REF_CLK
XTAL1
XTAL2
OSC
0
1
MR
S_LOAD
S_DATA
S_CLOCK
nP_LOAD
M0:M8
N0:N1
PLL
PHASE DETECTOR
VCO
0 ÷1
÷2
÷M
÷4
1 ÷8
CONFIGURATION
INTERFACE
LOGIC
IDT/ ICS3.3V LVPECL FREQUENCY SYNTHESIZER
FOUT0
nFOUT0
FOUT1
nFOUT1
TEST
1
32 31 30 29 28 27 26 25
M5 1
M6 2
M7 3
M8 4
N0 5
N1 6
nc 7
VEE 8
ICS8432I-51
24 XTAL_OUT
23 REF_CLK
22 XTAL_SEL
21 VCCA
20 S_LOAD
19 S_DATA
18 S_CLOCK
17 MR
9 10 11 12 13 14 15 16
32-Lead LQFP
7mm x 7mm x 1.4mm package body
Y Package
Top View
32-Lead VFQFN
5mm x 5mm x 0.95m package body
K Package
Top View
ICS8432BYI-51 REV. A SEPTEMBER 24, 2007

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