WIRELESS INFRASTRUCTURE SOLUTIONS
®
Wireless Infrastructure Solutions
to Enhance the Digital Media
Experience
IDT ADDRESSES NEXT GENERATION WIRELESS BY
ACCELERATING THE DATA PATH AND OFFLOADING
FUNDAMENTAL PROCESSING TASKS
The consumer of wireless communication devices demands higher performance to gain faster access to
their desired digital media content, while expecting error-free accuracy at ever-decreasing price points.
To achieve success in the marketplace, today’s system designer must balance the demand for increased
performance with continued focus on reliability, predictability and quality of service as well as reducing
power and lowering product costs.
FEATURED PRODUCTS
Serial RapidIO® switches
Functional InterConnect (FIC) devices
Serial buffers
SAW filters
Timing solutions
Digital logic
The highly competitive nature of the wireless communications field makes time-to-market and evolving
industry standards critical components of a successful design.
System designers need a partner who works to identify, understand and resolve system bottlenecks
one-by-one and throughout the whole system. IDT helps designers gain a significant edge by applying
our years of experience in innovative, low-power, mixed signal integrated circuit design to optimize the
performance of Serial RapidIO® (S-RIO) switches, serial buffers, Functional InterConnects, SAW filters,
timing solutions and digital logic system components in wireless applications.
Because IDT technology can perform fundamental core tasks such as offloading packet-and byte-level data
manipulation functions, FPGAs, ASICs and ASPs become increasingly more efficient. IDT pre-processing
switches and central packet switches, based on Serial RapidIO technology, efficiently process the quality
of service (QoS), prioritization and multicasting tasks that have historically slowed down (and heated up)
processors. This allows the processor to concentrate on what it does best: process higher-level content.
Add our wide array of timing solutions, filter devices and advanced digital logic elements and today’s
system designer has an unparalleled set of choices from one company they can rely on to deliver higher
performance systems to market more rapidly, using less power while reducing system costs.
IDT® WIRELESS INFRASTRUCTURE SOLUTIONS
1
Serial RapidIO® switches
Serial RapidIO interconnect switches have become the standard in communication systems, but there
are a number of considerations which govern the particular type of switch appropriate to each system
design. Optimized for wireless baseband processing applications, the IDT pre-processing switch (PPS)
is an advanced semiconductor solution which complements its high performance Serial RapidIO switching
by integrating an innovative suite of byte-and packet-level manipulation capabilities designed to offload
specific bandwidth-intensive tasks from the DSP.
IDT currently offers several Serial RapidIO switches for baseband applications: PPS, PPS Gen 2, central
packet switch (CPS) and the recently introduced CPS-10/6Q, so the designer can pick the combination of
port count, performance and functionality most pertinent to their system design.
Serial RapidIO Switch Comparison Matrix
PPS devices
CPS devices
PPS
70K2000
PPS Gen 2
80KSW0001
CPS-16
80KSW0002
CPS-12
80KSW0004
CPS-8
80KSW0003
CPS-10Q
80KSW0005
CPS-6Q
80KSW0006
22 1x ports
10 4x ports
Mix of both
12 1x ports
3 4x ports
Mix of both
16 1x ports
4 4x ports
Mix of both
12 1x ports
3 4x ports
Mix of both
8 1x ports
2 4x ports
Mix of both
16 1x ports
10 4x ports
Mix of both
16 1x ports
6 4x ports
Mix of both
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
Multicast
√
√
√
√
√
√
√
Non-blocking within each S-RIO priority
√
√
√
√
√
√
√
10
4
√
√
√
√
√
Device
Ports
Package
27 x 27 mm, 676 pin
19 x 19 mm, 324 pin
Features
Store and forward
Cut through
No. of pre-processing scenarios
Error Handling
√
√
√
√
√
Packet Trace/Mirror
√
√
√
√
√
Packet Filter/Kill
√
√
√
√
√
√
√
√
√
√
40 G
30 G
20 G
100 G
SerDes BIST
Aggregate Peak Throughput
√
100 G preprocessing
10 G switch
100 G combined
(port limited)
30 G preprocessing
30 G switch
30 G combined
(port limited)
Serial RapidIO benefits
Features
IDT has just the part you need
PPS, CPS or CPS-10/6Q
Port speed, width and reach can be individually configured
Up to 22 1x or 10 4x ports with 3.125 Gbps performance
PPS frees the DSP to run differentiating algorithms
Performs end-point functions (e.g., lower level data operations)
Enhances DSP and other end point connectivity
Optimally distributes data to multiple DSPs during Serial RapidIO switch interface
Eases system design implementation
Off-the-shelf components supports base station system bring-up and debug;
CPS is pin-compatible with PPS
Diverse design implementations are possible
Scalable to address wide range of wireless and non-wireless applications
Minimizes FPGA and ASIC costs
Standard component with Serial RapidIO connectivity
Eases and speeds design-in
Dedicated hardware/software development platform
For additional information about IDT Serial RapidIO products and parts, visit
www.IDT.com/go/SRIO.
IDT® WIRELESS INFRASTRUCTURE SOLUTIONS
2
60 G
Functional InterConnect (FIC) devices
As new high-performance interfaces are adopted in Wireless Infrastructure applications, such as
Serial RapidIO and CPRI™ (Common Public Radio Interface), there is a requirement for cost-effective,
off-the-shelf solutions that provide translation between these interfaces and legacy or less expensive
ASICs and FPGAs. IDT meets this need with their family of Functional InterConnect (FIC) devices
that offer low-cost connectivity between Serial RapidIO, CPRI, TDM (Time Division Multiplexor) and
standard parallel interfaces.
IDT FIC devices provide full-functional translation between the interfaces, eliminating the need for
designers to implement this functionality in an ASIC or FPGA. Utilizing FIC off-the-shelf components
allows the designer to use valuable programmable logic resources on the high-value processing tasks
that will differentiate his product in the marketplace. This also reduces design time and risk, saving
development expenses and improving overall time-to-market, as well as minimizing system cost by
off-loading the ASIC or FPGA of logic gate or serial transceiver requirements that can drive up their cost.
The block diagram in Figure 1 demonstrates how the IDT CPRI-FIC devices provide the connection
between the RF card and the baseband processing system in the wireless base station. Translation options
supported by the FIC devices include CPRI-to-Serial RapidIO, CPRI-to-TDM and Serial RapidIO-toParallel Interface.
FIC benefits
Features
Reduces design time
Standards based interfaces (Serial RapidIO rev 1.3, CPRI v2.1, QDRII) are used to seamlessly
connect to other components to save time
Dramatically reduces FPGA and ASIC costs
Elimination of transceivers and extra logic provides up to 90 percent cost savings in FPGA expense
Eases system design complexity and risk
Proven, off-the-shelf components for shorter time-to-market
Simplifies overall design architecture
Pre-processing capabilities of PPS can be combined with FIC devices to do all translation and
initial sample processing
Provides system flexibility
Data translation and formatting options available for sample manipulation
Complete system solution
When combined with the PPS and Serial Buffer, the FIC devices form the complete core solution for
baseband processing applications
For additional information about FIC products and parts from IDT, visit www.IDT.com/go/wireless.
Figure 1: Typical Wireless Infrastructure Block Diagram
DSP
IF
SAW
Filter
DSP
DSP
DSP
DSP
RF Downconverter
RF
SAW
Filter
IF
SAW
Filter
CPRI to TDM
FIC
CPRI
CPRI to S-RIO
FIC
S-RIO switch
PPS or CPS
Serial buffer
Demodulator
CRP / FPGA / ASIC
FemtoClock
Logic**
* IDT has the industry’s widest array of timing devices. Visit www.IDT.com/go/timing for more information.
** For additional information about IDT digital logic products and parts, visit www.IDT.com/go/logic.
IDT® WIRELESS INFRASTRUCTURE SOLUTIONS
3
Backplane
RF Upconverter
SAW
Duplexer
DSP
Modulator
Timing interface*
RF
SAW
Filter
Serial buffers
With tech-savvy consumers now demanding high value-added services such as mobile video at attractive
price points, designers understand that wireless networks for 3G (third generation) and beyond require
higher performance and lower cost base station systems. To satisfy the demands of both service providers
and consumers, low-cost, high-throughput implementations are needed.
The high-throughput environments of 3G wireless base stations, for example, rely on multiple digital
signal processors (DSPs) to deliver value-added services, which require high speed and large amounts
of memory to execute consecutive sample-compare functions.
The IDT 10 G serial buffer, when coupled with the IDT pre-processing switch (PPS) and FICs, forms a
chipset solution for wireless base station applications (see figure 1). The combination provides customers
with a complete processing and storage solution enabling scalable, flexible and cost-effective systems.
According to base station designers, the combination of the 10 G serial buffer and the PPS not only
reduces DSP loading by up to 20 percent, but also slashes bill of material (BOM) cost by 50 to 75 percent,
as compared to alternative solutions.
The 10 G serial buffer is a recent offering in the IDT ongoing commitment to provide leading-edge wireless
baseband solutions. In addition to cellular base stations, IDT Serial RapidIO solutions provide excellent
support for other DSP-intensive applications, such as medical imaging and high-speed communications
applications, as well as radar, data-acquisition and sampling.
Serial buffer benefits
Features
Dramatically improve performance
Eliminates local memory bottlenecks
Reduces silicon area (board space)
Eliminates or reduces the need for local memory entirely
Significantly simplifies design
Eliminates complex memory management schemes
Dramatically reduces the BOM (bill of materials)
Only 16 I/Os are needed, compared to alternative approaches requiring 100 I/Os
Maintains data synchronicity
Contains intelligent monitoring and control circuitry which automatically identifies and compensates
for dropped data packets
Provides a complete processing and storage solution enabling scalable,
flexible and cost-effective systems
10 G serial buffer solves the sample-compare problem—and the PPS solves the throughput-intensive
data processing and switching problems
Reduces DSP loading by up to 20% and slashes BOM by 50 to 75%,
as compared to alternative solutions
Combined chipset solution of 10 G serial buffer and PPS
For additional information about IDT serial buffer products and parts, visit www.IDT.com/go/serialbuffer.
Functional InterConnect (FIC) and Serial Buffer Matrix
FIC devices
Serial buffer devices
Device
FIC 80HFC1000
FIC 80HFC1001
FIC 80KFC1002
Serial buffer 80KSBR201
Ports
3 CPRI
3 CPRI
1 S-RIO (1x or 4x)
2 S-RIO (1x or 4x)
1 S-RIO (1x or 4x)
2 TDM (16 bit ports)
1 Parallel
(QDRII burst of 2)
1 Parallel
(QDRII burst of 2)
Package
19 x 19 mm, 324 pin
19 x 19 mm, 324 pin
23 x 23 mm, 484 pin
23 x 23 mm, 484 pin
Features
CPRI v2.1 compliant
CPRI v2.1 compliant
S-RIO 1.3 compliant
S-RIO 1.3 compliant
CPRI Master mode
Each CPRI port configurable as
Master or Slave to support chain
configurations
Parallel port for external processor,
FPGA, or memory
18 Mbits on-chip memory,
expandable to 90 Mbits with
external memory
S-RIO 1.3 compliant
TDM interfaces support dual
channel configurations
10 Gbps throughput
10 Gbps throughput
Programmable mapping
TDM control pins provided for
seamless connection to popular
ADC/DAC, DUC/DDC devices
Status flags and water marks
Status flags and water marks
Supports S-RIO maintenance
operations
Multiplexing mode options
CPRI:
614.4 / 1228.8 / 2457.6 Mbaud
CPRI:
614.4 / 1228.8 / 2457.6 Mbaud
S-RIO ports:
1.25 / 2.5 / 3.125 Gbaud
S-RIO ports:
1.25 / 2.5 / 3.125 Gbaud
S-RIO:
1.25 / 2.5 / 3.125 Gbaud
TDM:
up to 150 MHz per port
Parallel:
64-bits up to 200 MHz per port
Parallel:
64-bits up to 200 MHz per port
Performance
IDT® WIRELESS INFRASTRUCTURE SOLUTIONS
4
Configurable queue sizes
SAW filters
Today’s crowded radio frequency spectrum from baseband through 3 GHz requires system designers to
meet stringent regulatory requirements without sacrificing performance. Filter requirements demand high
selectivity, low insertion loss, flat passbands, and uniform group delay to meet performance criteria. In
addition, these filters must be highly repeatable, small size, low cost, and operate in adverse environmental
conditions. Surface acoustic wave (SAW) filters are a perfect match to such requirements.
There are a multitude of commercial applications of SAW filters. They include, but are not limited to,
telecommunications (base station and handheld), WiMAX, set top box and cable modems, navigation
(GIS/GPS), automotive, and medical. There are also space and military applications, including functions
from simple time delay to dispersive devices for complex matched filtering applications.
Early CDMA (code division multiple access) filters were very high-performance devices, demanding high
selectivity and out-of-band rejection as well as very low phase and amplitude ripple. These requirements
resulted in large filters having insertion losses between 20 dB and 25 dB. The costly filters were packaged
in large through-hole metal packages up to 3 inches in length.
As base station design progressed, the selectivity and out-of-band requirements placed on the SAW filters
were relaxed. Lowering insertion loss and size of the filters, and therefore cost, became the driving forces
in filter design. IDT developed “low loss” filter design capability to meet the needs of the 3G (third
generation) IF base station market.
IDT SAW filters have been used as IF (intermediate frequency) filters in wireless base stations for many
years. Today, IDT designs and manufactures SAW filters utilizing advanced state-of-the-art semiconductor
manufacturing techniques to meet the demanding criteria expected by their customers. SAW filters can
easily be integrated by the RF designer as part of the front-end solution to provide duplex operation,
RF filtering, and IF filtering after down conversion, or can be combined in a single hybrid module with
the appropriate amplifiers and mixers to provide a complete front-end solution. (See figure 1.)
A SAW filter design may be geared to any number of applications, such as:
s Bandpass filters for high-volume commercial applications
s Duplexers to meet stringent operational and regulatory requirements, or
s More complex silicon on ceramic (SOC) hybrids, combining SAW filters with various other devices
in a single hybrid package to meet specific requirements and functionality
A number of IDT SAW filters meet the requirements for 3G infrastructure protocols. With so many SAW
filters available from IDT, and each with custom capabilities, IDT can provide the proper solution to meet
customer requirements.
SAW filter benefits
Features
Meets the needs of the 3G IF base station market
“Low loss” filter design capability, highly reliable, low cost, excellent shape factor
Used in high volume commercial applications
Bandpass filters
Meets the needs of the 3G IF base station market
Very low passband distortion
Families of filters of various bandwidths will meet most 3G infrastructure protocols
Center frequencies from 70 MHz to 350 MHz are available
Easier implementation in a single hybrid package
More complex SOC hybrids combining SAW filters with other devices
Families of filters of various bandwidths will meet most 3G infrastructure protocols
RF SAW filters operate in the 800–900 MHz and 1800–1900 MHz bands
For additional information about IDT SAW filter products and parts, visit www.IDT.com/go/SAWfilters.
IDT® WIRELESS INFRASTRUCTURE SOLUTIONS
5
Timing solutions
A low phase noise clock design is critical in order to minimize serial link bit error rate and DAC/ADC
(digital to analog / analog to digital converters) errors for wireless infrastructure equipment. IDT offers
a family of integrated circuits designed to generate and distribute the clock frequency for synchronous
components in wireless infrastructure systems, such as SerDes, ADC/DAC circuits, local oscillators,
DSPs and control processors. Optimized for low phase noise, the IDT FemtoClock® clock synthesizers
and jitter attenuation devices are flexible solutions that support high level integration, while replacing the
more traditional (and more expensive) VCXO circuits.
Examples of wireless output clock
frequencies supported by IDT
integrated clock synthesizers
In contrast to competitive solutions, the IDT FemtoClock devices integrate the clock oscillator and offer
configuration flexibility. As seen in the wireless output frequencies table, even more integrated solutions
have the capability to generate several output frequencies and include fan-out buffers, reducing the
component count for more effective board designs.
15.36 MHz
30.72 MHz
122.88 MHz
153.6 MHz
156.25 MHz
491.52 MHz
614.4 MHz
Wireless infrastructure applications with digitally synthesized or recovered clock signals require jitter
attenuation to meet the low phase jitter requirements of the Serial RapidIO transceivers or ADC/DAC
devices. Traditionally this was achieved by expensive VCXO circuits. The family of IDT jitter-attenuation
and frequency generation devices based on the IDT FemtoClock technology offers a more effective and
higher integrated solution, and consists of several devices, such as ICS813076i, ICS814075i,
ICS813076i-02, ICS813076i-30 and ICS813076i-31. These devices support the common reference clock
frequencies of 2G, 3G (RP3, CPRI) and LTE systems.
The IDT WAN-PLL family supports wireless applications with demanding clock synchronization needs.
WAN-PLL devices are optimized single-chip solutions for synchronization between time division
multiplexer (TDM), synchronous optical network/ synchronous digital hierarchy (SONET/SDH) and
common baseband system frequencies and can function as effective frequency translators. The WAN-PLL
devices offer Stratum-compliance, holdover and master/slave support.
Timing solutions benefits
Features
Efficiency: IDT is your one-stop clock shop
Large portfolio of optimized timing solutions
Easy to use, standard compliant, frequency translators
Family of WAN-PLL devices optimized for system synchronization
Reduce jitter design problems
Dedicated jitter attenuation solutions for baseband and RF
Support a high integration level
Low-phase noise reference clock solutions for low bit-error rates designs
Reduces component count for more effective board designs
More integrated solutions capable of generating several output frequencies
More flexible clock solutions than oscillators
Higher integration level
For additional information about IDT timing products and parts, visit www.IDT.com/go/timing.
IDT® WIRELESS INFRASTRUCTURE SOLUTIONS
6
Digital logic
The IDT high-performance, low-voltage standard logic ICs and bus switch logic ICs are key to high-speed
computing and communications systems, including wireless base stations. The advanced portfolio offered
by IDT of advanced low-voltage CMOS (ALVC/ALVCH), low-voltage CMOS (LVC/LVCH), and fast CMOS
TTL-compatible (FCT) digital logic families allows designers to reduce power consumption, increase data
throughput and shrink form factors—while providing needed functions and speeds in cost-effective
space-saving packages.
For additional information about IDT digital logic products and parts, visit www.IDT.com/go/logic.
Conclusion
IDT wireless infrastructure solutions are an integral part of the worldwide communications network. From
core routers enabling the network upon which the Internet operates to base stations and mobile devices
that allow wireless communications, IDT devices enable a faster, more powerful digital media experience.
For more detailed information about how IDT can help you solve your wireless infrastructure solutions
needs, technical documentation, press releases, as well as comprehensive information on the wide variety
of related parts that IDT offers, please visit www.IDT.com/go/wireless.
You can also receive IDT product-related newsletters and updates and find local distributors by registering
at my.IDT.com. Select the myIDT menu on the upper right tab of the www.IDT.com web page, and select
“Register for myIDT” or go directly to www.IDT.com/go/register.
IDT® WIRELESS INFRASTRUCTURE SOLUTIONS
7
Applications
Associated product lines
Communications
Enterprise
s
s
s
s
Clocks/Timing
FIFO products
Multi-Port memories
PCI Express® switches
s Search engines & Accelerators
s Serial RapidlO® solutions
s Telecommunication ICs
Telecom
s
s
s
s
Clocks/Timing
FIFO products
Multi-Port memories
Physical layer devices
s Search engines & Accelerators
s SRAMs
s Telecommunication ICs
Wireless
Base Stations
s Clocks/Timing
s FIFO products
s Multi-Port memories
s SAW filters
s Serial RapidlO® solutions
s Telecommunication ICs
Desktops
s Advanced Memory Buffers
s Clocks/Timing
s PC Audio solutions
s PCI Express® switches
Embedded
s Clocks/Timing
s Multi-Port memories
s PC Audio solutions
s PCI Express® switches
Notebooks
s Clocks/Timing
s PC Audio solutions
s Video interfaces
Servers
s Advanced Memory Buffers
s Clocks/Timing
s PCI Express® switches
Digital TV
s Clocks/Timing
s Video interfaces
Gaming
s Clocks/Timing
s PC Audio solutions
Handsets
s Clocks/Timing
s FIFO products
s Multi-Port memories
Set Top Box
s Clocks/Timing
Computing
Consumer
Discover what IDT know-how can do for you.
www.IDT.com/go/wireless
© 2008 Integrated Device Technology, Inc. All rights reserved. Product specifications are subject to change without notice. IDT and the IDT logo are registered trademarks of Integrated
Device Technology, Inc. All other brands, product names and marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners.
®
Printed in USA 10-08/MG/BWD/HOP/500
FLYR-WIRELESS-108