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參數(shù)資料
| 型號： | ICS843002I-40 |
| 英文描述： | 175MHZ, FEMTOCLOCKS-TM VCXO BASED SONET/SDH JITTER ATTENUATOR |
| 中文描述： | 175MHz時，F(xiàn)EMTOCLOCKS，商標(biāo)VCXO的基于SONET / SDH的抖動衰減器 |
| 文件頁數(shù)： | 1/21頁 |
| 文件大小： | 277K |
| 代理商： | ICS843002I-40 |
843002AKI-40
www.icst.com/products/hiperclocks.html
REV. A JUNE 22, 2005
1
Integrated
Circuit
Systems, Inc.
ICS843002I-40
175MH
Z
, F
EMTO
C
LOCKS
VCXO B
ASED
SONET/SDH J
ITTER
A
TTENUATOR
PRELIMINARY
G
ENERAL
D
ESCRIPTION
The ICS843002I-40 is a member of the
HiperClockS family of high performance clock
solutions from ICS. The ICS843002I-40 is a PLL
based synchronous clock generator that is
optimized for SONET/SDH line card applications
where jitter attenuation and frequency translation is needed.
The device contains two internal PLL stages that are cascaded
in series. The first PLL stage uses a VCXO which is optimized
to provide reference clock jitter attenuation and to be jitter
tolerant, and to provide a stable reference clock for the 2nd
PLL stage (typically 19.44MHz). The second PLL stage
provides additional frequency multiplication (x32), and it
maintains low output jitter by using a low phase noise
FemtoClock VCO. PLL multiplication ratios are selected
from internal lookup tables using device input selection pins.
The device performance and the PLL multiplication ratios are
optimized to support non-FEC (non-Forward Error Correction)
SONET/SDH applications with rates up to OC-48 (SONET)
or STM-16 (SDH). The VCXO requires the use of an external,
inexpensive pullable crystal. VCXO PLL uses external passive
loop filter components which are used to optimize the PLL
loop bandwidth and damping characteristics for the given
line card application.
The ICS843002I-40 includes two clock input ports. Each one
can accept either a single-ended or differential input. Each
input port also includes an activity detector circuit, which
reports input clock activity through the LOR0 and LOR1 logic
output pins. The two input ports feed an input selection mux.
“Hitless switching” is accomplished through proper filter
tuning. Jitter transfer and wander characteristics are
influenced by loop filter tuning, and phase transient
performance is influenced by both loop filter tuning and
alignment error between the two reference clocks.
Typical ICS843002I-40 configuration in SONET/SDH Systems:
VCXO 19.44MHz crystal
Loop bandwidth: 50Hz - 250Hz
Input Reference clock frequency selections:
19.44MHz, 38.88MHz, 77.76MHz, 155.52MHz,
311.04MHz, 622.08MHz
Output clock frequency selections:
19.44MHz, 77.76MHz, 155.52MHz, Hi-Z
P
IN
A
SSIGNMENT
F
EATURES
(2) Differential LVPECL outputs
Selectable CLKx, nCLKx differential input pairs
CLKx, nCLKx pairs can accept the following differential
input levels: LVPECL, LVDS, LVHSTL, SSTL, HCSL or
single-ended LVCMOS or LVTTL levels
Maximum output frequency: 175MHz
FemtoClock VCO frequency range: 560MHz - 700MHz
RMS phase jitter @ 155.52MHz, using a 19.44MHz crystal
(12kHz to 20MHz): 0.81ps (typical)
Full 3.3V or mixed 3.3V core/2.5V output supply voltage
-40°C to 85°C ambient operating temperature
HiPerClockS
ICS
24
23
22
21
20
19
18
17
LOR0
LOR1
nc
V
CCO
_
LVCMOS
V
CCO
_
LVPECL
nQB
QB
V
EE
LF1
LF0
ISET
V
CC
CLK0
nCLK0
CLK_SEL
nc
Q
Q
n
Q
Q
V
C
Q
n
n
C
V
E
R
R
R
X
X
ICS843002I-40
32-Lead VFQFN
5mm x 5mm x 0.75mm package body
K 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.
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ICS843002AKI-41 | 700MHz, FEMTOCLOCKS-TM VCXO BASED SONET/SDH JITTER ATTENUATOR |
| ICS843002AKI-41T | 700MHz, FEMTOCLOCKS-TM VCXO BASED SONET/SDH JITTER ATTENUATOR |
| ICS843002I-41 | 700MHz, FEMTOCLOCKS-TM VCXO BASED SONET/SDH JITTER ATTENUATOR |
| ICS843002 | FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843002AG | FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS843002I-41 | 制造商:ICS 制造商全稱:ICS 功能描述:700MHz, FEMTOCLOCKS-TM VCXO BASED SONET/SDH JITTER ATTENUATOR |
| ICS843002I-72 | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:FEMTOCLOCKS⑩ VCXO BASED WCDMA CLOCK GENERATOR/JITTER ATTENUATOR |
| ICS843003 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843003AG | 制造商:ICSI 制造商全稱:Integrated Circuit Solution Inc 功能描述:FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843003AGI-01 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
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