Motor de Búsqueda de Datasheet de Componentes Electrónicos
  Spanish  ▼
ALLDATASHEET.ES

X  

SI5540 Datasheet(PDF) 9 Page - Silicon Laboratories

No. de pieza SI5540
Descripción Electrónicos  SiPHY OC-192/STM-64 TRANSMITTER
Download  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  SILABS [Silicon Laboratories]
Página de inicio  http://www.silabs.com
Logo SILABS - Silicon Laboratories

SI5540 Datasheet(HTML) 9 Page - Silicon Laboratories

Back Button SI5540 Datasheet HTML 5Page - Silicon Laboratories SI5540 Datasheet HTML 6Page - Silicon Laboratories SI5540 Datasheet HTML 7Page - Silicon Laboratories SI5540 Datasheet HTML 8Page - Silicon Laboratories SI5540 Datasheet HTML 9Page - Silicon Laboratories SI5540 Datasheet HTML 10Page - Silicon Laboratories SI5540 Datasheet HTML 11Page - Silicon Laboratories SI5540 Datasheet HTML 12Page - Silicon Laboratories SI5540 Datasheet HTML 13Page - Silicon Laboratories Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 20 page
background image
S i5540
Preliminary Rev. 0.31
9
Functional Description
The Si5540 is a fully integrated, low power, SONET/
SDH transmitter for OC-192/STM-64 applications. It
combines a high performance clock multiplier unit
(CMU) with a 16:1 serializer that has a low-speed
interface compliant with the Optical Interface Forum
(OIF) SFI-4 standard.
The CMU uses a phase-locked loop (PLL) architecture
based on Silicon Laboratories’ proprietary DSPLL
technology. This technology is used to generate ultra-
low jitter clock and data outputs that provide significant
margin to the SONET/SDH specifications. The DSPLL
architecture also utilizes a digitally implemented loop
filter that eliminates the need for external loop filter
components. As a result, sensitive noise coupling nodes
that typically cause degraded jitter performance in
crowded PCB environments are removed.
The
DSPLL
also
reduces
the
complexity
and
performance
requirements
of
reference
clock
distribution strategies for OC-192/STM-64 optical port
cards. This is possible because the DSPLL provides
selectable wideband and narrowband loop filter settings
that allow the user to set the jitter attenuation
characteristics of the CMU to accommodate reference
clock sources that have a high jitter content. Unlike
traditional analog PLL implementations, the loop filter
bandwidth is controlled by a digital filter inside the
DSPLL and can be changed without any modification to
external components.
DSPLLClock Multiplier Unit
The Si5540’s clock multiplier unit (CMU) uses Silicon
Laboratories’ proprietary DSPLL technology to generate
a low jitter, high frequency clock source capable of
producing a high speed serial clock and data output with
significant margin to the SONET/SDH specifications.
This is achieved by using a digital signal processing
(DSP) algorithm to replace the loop filter commonly
found in analog PLL designs. This algorithm processes
the phase detector error term and generates a digital
control value to adjust the frequency of the voltage
controlled oscillator (VCO). Because external loop filter
components are not required, sensitive noise entry
points are eliminated, thus making the DSPLL less
susceptible to board-level noise sources. Therefore,
SONET/SDH jitter compliance is easier to attain in the
application.
Programmable Loop Filter Bandwidth
The digital loop filter in the Si5530 provides two
bandwidth settings that support either wideband or
narrowband jitter transfer characteristics. The filter
bandwidth is selected via the BWSEL control input. In
traditional PLL implementations, changing the loop filter
bandwidth would require changing the values of
external loop filter components.
In narrowband mode, a loop filter cutoff of 12 kHz is
provided. This setting makes the Si5540 more tolerant
of jitter on the reference clock source. As a result, the
complexity of the clock distribution circuitry used to
generate the physical layer reference clocks can be
simplified without compromising jitter margin to the
SONET/SDH specification.
In wideband mode, the loop filter provides a cutoff of
50 kHz. This setting is desirable in applications where
the reference clock is provided by a low jitter source like
the
Si5364
Clock
Synchronization IC
or Si5320
Precision Clock Multiplier/Jitter Attenuator IC. This
allows the DSPLL to more closely track the precision
reference source resulting in the best possible jitter
performance.
Reference Clock
The CMU within the Si5530 is designed to operate with
reference clock sources that are either 1/16th or 1/64th
the desired output data rate. The CMU will support
operation with data rates between 9.9 Gbps and
10.7 Gbps and the reference clock should be scaled
accordingly. For example, to support 10.66 Gbps
operation
the
reference
clock
source
would
be
approximately 167 MHz or 666 MHz. The REFRATE
input pin is used to configure the device for operation
with
one
of
the
two
supported reference
clock
submultiples of the data rate.
The Si5540 supports operation with two selectable
reference clock sources. The first configuration uses an
externally provided reference clock that is input via
REFCLK. The second configuration uses the parallel
data clock, TXCLK16IN, as the reference clock source.
When using TXCLK16IN as the reference source, the
narrowband loop filter setting may be preferable to
remove jitter that may be present on the data clock. The
selection of reference clock configuration is controlled
via the REFSEL input. The Si5540 will drive the TXLOL
output high to indicate the DSPLL has locked to the
selected reference source.
Serialization
The
Si5540
includes
serialization
circuitry
that
combines a FIFO with a parallel to serial shift register.
Low speed data on the parallel input bus, TXDIN[15:0],
is latched into the FIFO on the rising edge of
TXCLK16IN. The data in the FIFO is clocked into the


Número de pieza similar - SI5540

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Silicon Laboratories
SI554 SILABS-SI554 Datasheet
132Kb / 15P
   QUAD FREQUENCY VOLTAGE-CONTROLLED CRYSTAL
logo
Skyworks Solutions Inc.
SI554 SKYWORKS-SI554 Datasheet
517Kb / 15P
   QUAD FREQUENCY VOLTAGE-CONTROLLED CRYSTAL OSCILLATOR (VCXO) 10 MHZ TO 1.4 GHZ
REVISION D
More results

Descripción similar - SI5540

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
List of Unclassifed Man...
SI5600 ETC1-SI5600 Datasheet
378Kb / 28P
   SiPHY-TM OC-192/STM-64 SONET/SDH TRANSCEIVER
logo
Source Photonics, Inc.
FAM-50X1S-T40 SOURCE-FAM-50X1S-T40 Datasheet
248Kb / 14P
   OC-192/STM-64 SFF Transponder
FAM-30X1S-T7 SOURCE-FAM-30X1S-T7 Datasheet
242Kb / 14P
   OC-192/STM-64 SFF Transponder
FAM-70X1S-T40 SOURCE-FAM-70X1S-T40 Datasheet
254Kb / 14P
   OC-192/STM-64 SFF Transponder
logo
Agere Systems
R2860A AGERE-R2860A Datasheet
83Kb / 6P
   Digital Receiver OC-192/STM-64
logo
List of Unclassifed Man...
1319T ETC1-1319T Datasheet
450Kb / 9P
   1319T OC-192/STM-64 Lighwave Receiver
logo
Agere Systems
R2860E AGERE-R2860E Datasheet
84Kb / 6P
   R2860E Digital Receiver OC-192/STM-64
R2860G AGERE-R2860G Datasheet
129Kb / 6P
   R2860G Digital Receiver OC-192/STM-64
R2860D AGERE-R2860D Datasheet
107Kb / 6P
   R2860D Digital Receiver OC-192/STM-64
R2860F AGERE-R2860F Datasheet
84Kb / 6P
   R2860F Digital Receiver OC-192/STM-64
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20


Datasheet Descarga

Go To PDF Page


Enlace URL




Política de Privacidad
ALLDATASHEET.ES
¿ALLDATASHEET es útil para Ud.?  [ DONATE ] 

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Intercambio de Enlaces   |   Lista de Fabricantes
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com