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ICS8432-11

Description
700MHZ/350MHZ, LOW PHASE NOISE, CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER
File Size179KB,16 Pages
ManufacturerICS ( IDT )
Websitehttp://www.icst.com
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ICS8432-11 Overview

700MHZ/350MHZ, LOW PHASE NOISE, CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER

PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS8432-11
700MH
Z
/350MH
Z
, L
OW
P
HASE
N
OISE
,
C
RYSTAL
-
TO
- 3.3V LVPECL F
REQUENCY
S
YNTHESIZER
F
EATURES
Dual differential 3.3V LVPECL outputs
Selectable crystal oscillator interface or
LVCMOS/LVTTL TEST_CLK
TEST_CLK can accept the following input levels:
LVCMOS or LVTTL
Maximum FOUT frequency: 700MHz
Maximum FOUT/2 frequency: 350MHz
VCO range: 200MHz to 700MHz
Parallel interface for programming counter and
VCO frequency multiplier and dividers
Cycle-to-cycle jitter: 25ps (maximum)
RMS period jitter: TBD
3.3V supply voltage
0°C to 70°C ambient operating temperature
G
ENERAL
D
ESCRIPTION
The ICS8432-11 is a general purpose, dual output
Crystal-to-3.3V Differential LVPECL High Frequency
HiPerClockS™
Synthesizer and a member of the HiPerClock™
S
family of High Performance Clock Solutions from
ICS. The ICS8432-11 has a selectable TEST_CLK
or crystal inputs. The TEST_CLK input accepts LVCMOS or
LVTTL input levels and translates them to 3.3V LVPECL
levels. The VCO operates at a frequency range of 200MHz
to 700MHz. The VCO frequency is programmed in steps
equal to the value of the input reference or crystal frequency.
Output frequencies up to 700MHz for FOUT and 350MHz
for FOUT/2 can be programmed using the serial or parallel
interfaces to the configuration logic. The low phase noise
characteristics and the multiple frequency outputs of the
ICS8432-11 makes it an ideal clock source for Fiber Channel
1 and 2, and Infiniband applications.
ICS
B
LOCK
D
IAGRAM
VCO_SEL
XTAL_SEL
TEST_CLK
XTAL_IN
XTAL_OUT
P
IN
A
SSIGNMENT
XTAL_OUT
VCO_SEL
nP_LOAD
M4
M3
M2
M1
M0
32 31 30 29 28 27 26 25
M5
M6
M7
M8
N0
N1
nc
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16
TEST
V
CC
FOUT/2
nFOUT/2
V
CCO
FOUT
nFOUT
V
EE
24
23
22
XTAL_IN
TEST_CLK
XTAL_SEL
V
CCA
S_LOAD
S_DATA
S_CLOCK
MR
ICS8432-11
21
20
19
18
17
MR
FOUT
nFOUT
FOUT/2
nFOUT/2
V
EE
S_LOAD
S_DATA
S_CLOCK
nP_LOAD
M0:M8
N0:N1
TEST
32-Lead LQFP
7mm x 7mm x 1.4mm package body
Y Package
Top View
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial
product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.
8432CY-11
www.icst.com/products/hiperclocks.html
1
REV. E MAY 20, 2005

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Description 700MHZ/350MHZ, LOW PHASE NOISE, CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER 700MHZ/350MHZ, LOW PHASE NOISE, CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER 700MHZ/350MHZ, LOW PHASE NOISE, CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER
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