www.semtech.com
UHD-SDI
Broadcast Video Selector Guide
• Equalizers
• Cable Drivers
• Reclockers
• Configurable Input/Output Devices
• Gearbox
• Transmitters
• Receivers
• Crosspoint Switches
• Timing (GEN-Clocks)
FEATURING 2017 New UHD-SDI Solutions
contents
Equalizers 4
Cable Drivers 5
Reclockers 6
Configurable SDI–I/O 7
UHD-SDI Gearbox 8
SDI Transmitters & Receivers 10
SDI Transmitters 11
SDI Receivers 12
SDI Crosspoints 13
Timing (GEN-Clocks) 14
High-Performance
UHD-SDI Products
Semtech’s broadcast video products extend its 20+ year leadership in SDI
technology by being first to market with an array of advanced UHD-SDI
solutions. Semtech’s multi-rate device lineup enables customer roadmaps,
facilitating the creation of differentiated and advanced UHD-SDI products.
We offer the world’s most advanced solutions designed specifically for real
world broadcast challenges, including the latest innovations that help push the
boundaries of performance, reach, power, and signal integrity while reducing
time to market and design risks.
Comprehensive portfolio of industry-leading UHD-SDI products
We offer the most comprehensive, end-to-end portfolio of UHD-SDI video
solutions available, including our new family of long-reach, multi-rate 12G
retiming equalizers and cable drivers, low-power 3G equalizers, cable drivers and
reclockers, integrated adaptive cable equalizers and cable drivers, and innovative
UHD-SDI gearbox solutions.
UHD-SDI: The Next Generation Broadcast Television Production Interface
New UHD-SDI solutions are needed to enable next-generation broadcast television and D-Cinema applications.
UHD-SDI is the only fully-standardized interface for next-generation broadcast television production for high
definition television (HDTV), ultra-high definition television (UHDTV), high dynamic range (HDR), high frame rate
(HFR), and wide color gamut (WCG) services.
Dedicated to customer success
Our commitment to customer success is the driver for everything we do. That’s why we:
• Comprehensively test each component in production, assuring high-yield on assembled boards.
• Offer complimentary design support, including review and feedback to shorten development cycles,
reduce risks and optimize performance.
• Provide dedicated field applications engineering support throughout the product’s life cycle.
4 Semtech Broadcast Video Selector Guide • Fall 2017
NEW
EQUALIZERS
Part
Number
Data Rate
(Mbps)
Input
0/6dB
gain
Output
Coupling
(V)
No. of
Inputs
No. of
Outputs
Cable Length (m)
Temp Range
(ºC)
Power
(mW)
Package
(mm)
12G
6G 3G
HD SD
GS12241
1
–
11880
YES*1.2–2.5 1 2 80 100 190
260 450 -40 to +85
385***
QFN-40 (
6x4)
GS12142
**
1
–
11880
YES*1.2–2.5 2 2 80 100 190
260 450 -40 to +85
385***
QFN-40 (
6x4)
GS12141
1
–
11880
YES*1.2–2.5 1 2 70 90 190
260 450 -40 to +85
320***
QFN-40 (
6x4)
GS3241
**
1
–
2970
YES*1.2–2.5 1 2 – – 200
280 400 -40 to +85
385***
QFN-40 (
6x4)
GS3140
1–2970 YES*1.0–2.5 1 1 – – 200
280 500 -40 to +85
83
QFN-16-COL (
4x4)
GS6042
125–5940 YES 1.2–3.3 1 1 – 80 210
300 550 -40 to +85
180
QFN-16 (
4x4)
GS3440
125–2970 YES 1.2–3.3 1 1 – – 210
300 550 -40 to +85
180
QFN-16 (
4x4)
GS3441
125–2970 YES 1.2–3.3 1 2 – – 210
300
550
-40 to +85
212
QFN-24 (
4x4)
*Features adjustable upstream launch swing compensation. **GS12142 and GS3241 specifications are preliminary and subject to change.
***Power specifications include power consumed by integrated retimer
Equalizers
Integrated retiming, low-power, long reach, and support for data rates up
to 11.88Gbps.
SUPPORT UHD-SDI RATES UP TO 12G
Semtech offers multi-rate adaptive cable equalizers that
support rates up to 11.88Gbps while continuing to offer
industry-leading performance at 6G, 3G, HD, and SD rates.
Semtech’s GS12241 adaptive cable equalizer features an
integrated retimer to maximize performance. In addition
to robust performance, Semtech adaptive cable equalizers
comply to SMPTE ST 2081-1, ST 2082-1, ST 424, ST 292,
and ST 259 standards.
LOW-POWER AND SMALL PACKAGE SIZE
PCB board density continues to increase, placing additional
requirements for both small package size and low-power.
Semtech’s GS12241 adaptive cable EQ with integrated
retiming features a 6x4 QFN package. This manufacturing
friendly, asymmetric package facilitates high density designs
by accommodating a very dense connector pitch with its
narrow 4mm package width.
In addition, Semtech features a range of adaptive cable
equalizers for applications requiring low-power. The
GS3140 low-power, multi-rate 3G adaptive cable equalizer
is ideal for applications requiring both low-power and long
cable reach.
ADVANCED SIGNAL INTEGRITY DIAGNOSTICS
The GS12241 features unique diagnostic capabilities,
including pattern generation and error checking, and a
high-resolution 3D eye monitor to ease board design and
debugging while speeding time to market.
INTEGRATED RETIMING/RECLOCKING, LOWEST JITTER
The GS12241’s integrated retimer ensures low output jitter,
even at extended cable lengths.
CROSSTALK INTERFERENCE ROBUSTNESS
The advanced design minimizes the effect of inter-channel
crosstalk interference in high channel-density applications.
GS12241
Adaptive
Cable
Equalizer
Retimer
Eye
Monitor
Trace Driver
with
Preemphasis
Trace Driver
with
Preemphasis
PRBS
Checker
CS SCLK SDIN SDOUT GPIO0 GPIO1GPIO2 GPIO3
Selection per
Output:
Retimed Data
Bypass Data
PRBS Gen
Control & Status
DDO0
DDO1
SDI
www.semtech.com 5
NEW
MULTI-RATE
Semtech’s UHD-SDI cable drivers are SMPTE compliant
and feature multi-rate operation; our high-performance
GS12281 12G UHD-SDI cable driver is the industry’s
best performing driver. Semtech offers a driver for every
UHDTV-1, UHDTV-2, 3G, HD, and SD application.
INTEGRATED RETIMING/RECLOCKING
The GS12281’s integrated retimer enables the best jitter
performance at all rates up to 11.88Gbps.
ADVANCED SIGNAL INTEGRITY DIAGNOSTICS
The GS12281 features unique diagnostic capabilities,
including pattern generation and error checking, and
a high-resolution 3D eye monitor to ease board design and
debugging while speeding time to market.
INPUT TRACE EQUALIZATION
The GS12281 features input trace equalization to compensate
for long input trace lengths. Input trace equalization is
critical for optimizing performance in 12G UHD-SDI designs.
BEST OUTPUT RETURN LOSS
Output return loss performance that surpasses SMPTE
specifications at all rates. This increased margin simplifies
board optimization to speed production.
OUTPUT EYE SHAPING
The GS12281 features an output signal presence detector
which provides status on the validity of the output. The
GS12281 also offers high maximum output swing and
sophisticated, yet easy-to-use, pre-emphasis to compensate
for losses that occur after the cable driver output.
CABLE DRIVERS
Part
Number
Data Rate
(Mbps)
Power
(mW)
Power
Supply
(V)
No. of
Inputs
No. of
Outputs
Input
Trace
EQ
Max Output
Swing
(mV)
ORL
(dB)
Circuit
Compatible
with
Temp Range
(ºC)
Package
(mm)
GS12281
1–11880 360**
1.8,
2.5
1
2
YES
1000
12G:-10
6G:-10
3G:-15
HD:-19
GS12181
GS12081
GS12090
GS3281
GS3590
-40 to +85 QFN-40
(
6x4)
GS12182*
1–11880 360**
1.8,
2.5
2
2
YES
1000
12G:-10
6G:-10
3G:-15
HD:-19
GS12281
GS12181
GS12081
GS3281
-40 to +85 QFN-40
(
6x4)
GS12181
1–11880 310**
1.8,
2.5
1
2
YES
1000
12G:-10
6G:-10
3G:-15
HD:-19
GS12281
GS12081
GS12090
GS3281
GS3590
-40 to +85 QFN-40
(
6x4)
GS12081*
1 -11880 170
1.8,
2.5
1
2
YES
1000
12G:-10
6G:-10
3G:-15
HD:-19
GS12281
GS12181
GS12090
GS3590
GS3281
-40 to +85 QFN-40
(
6x4)
GS3281*
1–2970
360** 1.8,
2.5 1 2 YES
1000 3G:-15
HD:-19
GS12281
GS12181
GS12081
GS12090
GS3590 -40 to +85 QFN-40
(
6x4)
GS6080
143–5940
135
2.5
or
3.3
1 2 YES
1800
6G:-10
3G:-15
HD:-19
GS2988 -40 to +85 QFN-16
(
4x4)
GS6081
143–5940
205
2.5
or
3.3
1 4 YES
1800
6G:-10
3G:-15
HD:-19
GS2989 -40 to +85 QFN-16
(
4x4)
*GS12182, GS12081 and GS3281 specifications are preliminary and subject to change. **Power specifications include power consumed by integrated retimer
GS12281
Trace
Equalizer
Retimer
Eye
Monitor
Cable Driver
with
Preemphasis
Cable Driver
with
Preemphasis
PRBS
Checker
DDI
CS SCLK SDIN SDOUT GPIO0 GPIO1GPIO2 GPIO3
Selection per
Output:
Retimed Data
Bypass Data
PRBS Gen
Control & Status
SDO0
SDO1
Cable Drivers
Integrated retiming for the lowest output jitter, sophisticated easy-to-use eye
shaping for SMPTE compliance and data rates up to 11.88Gbps.
6 Semtech Broadcast Video Selector Guide • Fall 2017
GS12150
Trace
Equalizer
Retimer
Eye
Monitor
Trace Driver
with
Preemphasis
Trace Driver
with
Preemphasis
PRBS
Checker
CS SCLK SDIN SDOUT GPIO0 GPIO1GPIO2 GPIO3
Selection per
Output:
Retimed Data
Bypass Data
PRBS Gen
Control & Status
DDO0
DDO1
Trace
Equalizer
DDI0
DDI1
Input Select
NEW
RECLOCKERS
Part
Number
Data Rate
(Mbps)
Power
Supply
(V)
Integrated
Eye Monitor
Output
Jitter
(UI)
Input
Trace
EQ
Output Pre-/
De-emphasis
Input
MUX
No. of Inputs No. of
Outputs
Temp
Range
(ºC)
Power
(mW) Package
(mm)
GS12150*
11880
5940
2970
1485
270
1.8
YES
12G:0.08
6G:0.05
3G:0.04
HD:0.03
SD:0.03
YES YES 2:1 2 2 -40 to +85 385
QFN-40
(6x4)
GS6151
5940
2970
1485
270
1.8 YES
6G:0.13
3G:0.09
HD:0.06
SD:0.03
YES YES
2:1
2 2 -40 to +85 130
QFN-32
(4x4)
GS6152
5940
2970
1485
270
1.8 YES
6G:0.13
3G:0.09
HD:0.06
SD:0.03
YES YES
4:1
4 2 -40 to +85 130
QFN-48
(6x6)
Reclocking is an important function required to maintain
overall system robustness. As UHD-SDI infrastructure
continues to grow in size and as greater amounts of
processing are being integrated into broadcast products,
overall system jitter can potentially increase. As a result,
controlling overall system jitter is critical to reliable
operation.
Processing devices such as FPGAs can have poor input
jitter tolerance (IJT) and frequently require external
reclocking to maintain overall system margin. The rapid
growth in UHD-SDI infrastructure and the associated
higher rates make reclocking mandatory in most
applications. Semtech offers a complete family of
UHD-SDI reclockers for all data rates. The GS12150
reclocker supports rates up to 11.88Gbps with low-power
consumption and is ideal for UHD-SDI applications.
ADVANCED SIGNAL INTEGRITY FEATURES
The GS12150 includes programmable trace equalization
to compensate for high-frequency losses associated with
board level interconnects. It operates without an external
frequency reference. Programmable output swing and pre-
emphasis provide flexibility for managing signal integrity of
the output signals.
The GS12150 features unique diagnostic capabilities,
including pattern generation and error checking, and a
high-resolution 3D eye monitor to ease board design and
debugging while speeding time to market.
SMALL SIZE
The GS12150 features a compact 6x4 40-pin QFN package.
Ideal for high-channel density designs or other applications
where the layout is constrain by available PCB real estate.
LOW-POWER
The GS12150’s low-power consumption is ideal for designs
with high channel density or in applications where low-
power consumption is a critical design requirement.
Reclockers
Industry’s best-performing reclockers.
*GS12150 specifications are preliminary and subject to change.
www.semtech.com 7
GS12090
Control & Status
Selector
Trace
Equalizer
Cable
Driver
Pre-emphasis
Data/
Bypass/
PRBS/
CLK
Retimer
Data/
Bypass/
PRBS
Cable
Equalizer
Eye MonitorSlicer
Trace
Driver
Pre-emphasis
DDI
DDO
CSb SCLK SDIN SDOUT GPIO0 GPIO1 GPIO2 GPIO3
SDIO
DESIGN FLEXIBILITY
The GS12090 is a low-power, configurable 12G multi-rate
retiming cable equalizer and cable driver. The GS12090
is suitable for systems with limited connector space and
enables individual connectors to function either as an input
or an output. In addition, the GS12090 is ideal for multi-
function designs requiring connectors be reconfigurable
based on a given customer’s needs.
Applications suitable for the GS12090 include next-
generation 3G, 6G, and 12G UHD-SDI infrastructures
designed in support of UHDTV1, UHDTV2, 4K D-Cinema,
and 3D HFR and HDR production image formats.
ADVANCED SIGNAL INTEGRITY FEATURES
The GS12090 features integrated retiming, minimizing
output jitter even at extended cable lengths. To compensate
for PCB trace losses and to simplify PCB layout optimization
the GS12090 features output pre-emphasis. In addition,
to facilitate optimal PCB layout, the GS12090 requires no
external return loss components or return loss networks.
Configurable SDI Input/Output -
Equalizer/Cable Driver
High-performance configurable devices for multi-rate applications up to 12Gbps.
www.semtech.com 7
ADVANCED SIGNAL INTEGRITY DIAGNOSTICS
The GS12281 features unique diagnostic capabilities,
including pattern generation and error checking, and a
high-resolution 3D eye monitor to ease board design and
debugging, and speed production time.
SMALL PACKAGE SIZE
The GS12090 features a compact 6x4, QFN package and
low-power consumption.
CONFIGURABLE SDI INPUT/OUTPUT - EQUALIZER/CABLE DRIVER
Part
Number
Data Rate
(Mbps) Power
(mW)
No. of
Outputs
Cable Reach
(m)
Integrated
Retiming
Circuit
Compatible
with
DVB-ASI
and MADI
Temp Range
(ºC)
Package
(mm)
GS12090*1–11880 EQ: 460**
CD: 390**
EQ: 1
CD: 1
12G:60
6G:80
3G:160
HD:240
SD:300
YES
GS3590
GS12181
GS12281
GS12081
GS3281
YES
-40 to +85
QFN-40 (6x4)
GS3590*1–2970 EQ: 460**
CD: 390**
EQ: 1
CD: 1
3G:160
HD:240
SD:300
YES
GS12090
GS12181
GS12281
GS12081
GS3281
YES
-40 to +85
QFN-40 (6x4)
GS3490 125–2970 EQ: 202
CD: 215
EQ: 1
CD: 1
3G:140
HD:260
SD:500
NO – YES
-40 to +85
QFN-32 (5x5)
*GS12090 and GS3590 specifications are preliminary and subject to change. **Power specifications include power consumed by integrated retimer.
8 Semtech Broadcast Video Selector Guide • Fall 2017
UHD-SDI GEARBOX
Part
Number
SDI Rates
Error and
Format
Detection
SMPTE 352M
Handling
Input SKEW
Adjustment
Per Lane Output Delay
Adjustment
Temp Range
(ºC) Package
GS12070
HD, 3G, 6G,
12G (270M bypass) YES YES YES YES
-40 to +85 BGA 196
The GS12070 is a four-input and four-output device which
supports conversions between multi-link, dual-link and
single-link UHD-SDI interfaces. A bypass mode is also
available where the inputs can be routed directly to the
outputs. The device supports 12Gbps, 6Gbps, 3Gbps,
and 1.5Gbps data rates in the conversion modes and
additionally supports 270Mbps in bypass mode.
The GS12070 features 100ohm differential serial interfaces,
allowing connection to Semtech equalizers, cable drivers as
well as optical modules.
SINGLE-CHIP CONVERSION
The GS12070 can be conveniently configured for both
multiplex and de-multiplex modes via mode select pins.
ROBUST RECEIVE SOLUTION
The GS12070 eases the system challenge of receiving
multi-link SDI signals by automatically compensating for
input channel skew. In modes that convert from 12Gbps
6Gbps combinations, the GS12070 automatically
compensates for up to 300ns of serial input channel
skew. In all other conversion modes, up to 800ns of input
channel skew is available. Also featured is automatic
link ordering, which reduces the cost and time spent
troubleshooting cabling issues during the installation of
UHD-SDI infrastructures.
FLEXIBLE DISTRIBUTION MODES
In configuration modes where there are unused outputs
available, the GS12070 can be programmed to duplicate
existing outputs. In addition, inputs can be assigned to
unused outputs for monitoring purposes.
The GS12070 also features an integrated 4x4 crosspoint
which enables any input to be routed to any output. This is
ideal for routing and distribution applications.
APPLICATIONS
• Multiplex/Demultiplex for 3G router applications
• UHD-SDI distribution amplifier
• 4:11:4 selector
• UHD-SDI crosspoint applications
• 12G UHD-SDI interfacing
• SDI link concatenation
UHD-SDI Gearbox
Single-chip UHDTV SDI link rate conversion.
GEARBOX MODES
12Gbps
Quad 3Gbps
12Gbps
Dual 6Gbps*
6Gbps
Dual 3Gbps*
6Gbps
Quad 1.5Gbps
3Gbps
Dual 1.5Gbps*
* Two conversions can be performed simultaneously.
www.semtech.com 9
www.semtech.com 9
DDO0
DDO0
DDO1
DDO1
DDO2
DDO2
DDO3
DDO3
Rx
Rx
Rx
Rx
Video
Detection
Video
Detection
Video
Detection
Video
Detection
Tx
Tx
Tx
Tx
MUX/
DEMUX
PID and
CRC
Handling
Output
Crosspoint
Control, GSPI
DDI0
DDI0
DDI1
DDI1
DDI2
DDI2
DDI3
DDI3
Ref clk
Xtal
UHD-SDI Gearbox
Single-chip UHDTV SDI rate conversion.
www.semtech.com 9
10 Semtech Broadcast Video Selector Guide • Fall 2017
EQ
Transmitter
w/CD
11
11
Complete Complete
Complete Solution Transmitter/Receiver
EQ+Receiver
SDI Output
SDI Input Low-End FPGA
Spartan 3A, Cyclone III
Proprietary Customer
Logic
Receiver
VCXO
Digital
SMPTE processing
Proprietary Customer Logic
CD
Reclocker
EQ
Receiver
Transmitter
Integrated Transceiver FPGAs
12
EQ
Digital
SMPTE processing
Proprietary Customer Logic
Receiver Transmitter
w/CD
PartialPartial
12
FPGA-Helper SERDES
SDI Output SDI Input
High-End FPGA
Virtex 5, Stratix II GX
SDI Output SDI Input
High-End FPGA
Virtex 5, Stratix II
EQ
Transmitter
w/CD
11
11
Complete Complete
Complete Solution Transmitter/Receiver
EQ+Receiver
SDI Output
SDI Input Low-End FPGA
Spartan 3A, Cyclone III
Proprietary Customer
Logic
Receiver
VCXO
Digital
SMPTE processing
Proprietary Customer Logic
CD
Reclocker
EQ
Receiver
Transmitter
Integrated Transceiver FPGAs
12
EQ
Digital
SMPTE processing
Proprietary Customer Logic
Receiver Transmitter
w/CD
PartialPartial
12
FPGA-Helper SERDES
SDI Output SDI Input
High-End FPGA
Virtex 5, Stratix II GX
SDI Output
SDI Input
High-End FPGA
Virtex 5, Stratix II
EQ
Transmitter
w/CD
11
11
Complete Complete
Complete Solution Transmitter/Receiver
EQ+Receiver
SDI Output
SDI Input Low-End FPGA
Spartan 3A, Cyclone III
Proprietary Customer
Logic
Receiver
VCXO
Digital
SMPTE processing
Proprietary Customer Logic
CD
Reclocker
EQ
Receiver
Transmitter
Integrated Transceiver FPGAs
12
EQ
Digital
SMPTE processing
Proprietary Customer Logic
Receiver Transmitter
w/CD
PartialPartial
12
FPGA-Helper SERDES
SDI Output SDI Input
High-End FPGA
Virtex 5, Stratix II GX
SDI Output SDI Input
High-End FPGA
Virtex 5, Stratix II
Designers have the choice of selecting components
from different vendors, but when it comes to designs
with SDI transmitters and SDI receivers, they must first
choose an architecture. In implementing a design with
a SDI transmitter and/or SDI receiver, there are three
architectural choices: Semtech’s complete SDI transmitter/
SDI receiver solution architecture, an integrated-
transceiver FPGA architecture, and a FPGA-helper
architecture. Let’s explore these three options with an
assessment of the following key parameters: jitter, power
consumption, integration (component/features), time-to-
market, system size, and cost.
SEMTECH’S COMPLETE SOLUTION ARCHITECTURE
Leveraging our expertise in signal integrity and our deep
understanding of broadcast video technologies, Semtech’s
SDI transmitter and SDI receiver offering encapsulates
all the analog components (SerDes, VCO, CD, EQ and
Reclocker) and digital SMPTE video and audio processing
required to transmit and receive SDI video. Integrating
all of these components into one package reduces the
PCB footprint required to implement SDI transmit/receive,
and the solution benefits from Semtech’s superior jitter
performance. This optimized, cost-effective and power
efficient ASIC implementation allows customers to focus
on their unique value-added processing for quicker time-to-
market. Only Semtech offers a solution that scores high for
each evaluation parameter.
INTEGRATED-TRANSCEIVER FPGA ARCHITECTURE
Integrated-transceiver FPGAs typically offer the worst
specifications in terms of jitter. Maximum output jitter and
input jitter tolerance (IJT) are typically at the limit of the
SMPTE standards and, in some cases, actually in violation
of industry norms. That is why extra components, namely
VCXOs and reclockers, are required to get the system
jitter performance to an acceptable level. This comes at a
penalty of higher power consumption, system footprint
size and cost. Because of all the fine tuning required
to get this architecture to work and because of the IP
licensing/development required for the digital SMPTE
video processing, this architecture unnecessarily prolongs
time-to-market. Finally, while FPGAs integrate transceivers,
they do not integrate routing components like cable
drivers and equalizers.
FPGA-HELPER ARCHITECTURE
The FPGA-helper architecture, as depicted below, involves
the use of a component that includes the physical media
attachment part of a SMPTE SDI receiver/SDI transmitter
with the digital SMPTE processing implemented in the
FPGA. The result is an architecture that is taxing in terms
of power consumption, and those FPGA-helper parts are
lacking even basic SMPTE digital processing.
In many cases, product specific FPGA IP already requires
high utilization factors in small, low-cost FPGAs, and the
added requirement of digital SMPTE video processing
in the FPGA may drive adoption of a larger FPGA. This
results in further penalties in power consumption, size
and system cost. And while this architecture fares well
in system jitter performance in certain cases, the added
engineering effort in developing (or licensing) and
stitching that video processing logic to product specific
code ensures a slower time-to-market. Finally, while some
FPGA-helper parts integrate a cable driver, the offering
lacks an integrated equalizer.
HOW THE SEMTECH SOLUTION STACKS UP
Compare the ratings of each of the three architectures for key
parameters in an implementation of 1Rx and 1Tx channel.
SDI Transmitters and Receivers
Choose the right SDI transmitter and SDI receiver for your system.
Semtech
Complete
Solution
Integrated
Transceiver
FPGA
FPGA-Helper
SerDes
Jitter Performance
Time-to-Market
Power Consumption
Integration
Overall PCB Space
System Cost
www.semtech.com 11
GS2972
SDI
Output
Video
Processing Serializer
Video
T
iming
Pclk
Audio
Cable
Driver
Narrow
LBW PLL
Audio
Embedder
3Gbps SDI
Semtech’s GS2972 and GS2962 are fully compatible with
SMPTE ST 424 and ST 425 as well as new ST 2081-1 and
ST 2082-1 UHD-SDI standards. In addition, Semtech SDI
transmitters feature integrated SMPTE video processing
including scrambling, TRS detection, insertion, and ancillary
data insertion.
Semtech’s GS2972 SDI transmitter includes an integrated
audio embedder and supports AES, I2S and serial audio
formats. The fully integrated functionality of Semtech’s
SDI transmitters, provides the lowest power and smallest
footprint solution for a complete SDI transmit link.
COMPLETE VIDEO PROCESSING
Semtech SDI transmitters have the most complete video
processing features available. These include, but are not
limited to, scrambling, TRS detection or insertion and
ancillary data insertion.
GREAT FOR DVB-ASI
All Semtech SDI transmitters are DVB-ASI capable.
AUDIO EMBEDDING
Semtech’s SDI transmitters include an integrated audio
embedder supporting AES, I2S and serial audio formats.
EXCELLENT JITTER PERFORMANCE
Due to the integrated PLL with narrow loop bandwidth,
the SDI transmitters can reject up to 300ps of jitter on the
parallel clock, outputting very low jitter, SMPTE-compliant
SDI signals.
POWER AND AREA EFFICIENT
The high level of integration in Semtech’s SDI transmitters
provides the lowest power and smallest means of
implementing a SDI link.
APPLICATIONS
Cameras, camera control units, multi viewers, routers,
production switchers, master control switchers, VTRs,
video servers, encoders/decoders, up/down/cross
converters, audio embedders, format detectors, test, and
measurement equipment.
SDI TRANSMITTERS
Part
Number
Data Rate
(Mbps)
Video
Processing
DVB/
ASI
Ancillary
Data
Insert
Audio
Embed
Cable
Driver
Output
Jitter (ps)
Parallel
Bus
Width
CEA
861
Timing
Temp Range
(ºC)
Power
(mW) Package
GS2972
270
1485
2970
YES YES YES YES YES
3G:40
HD:50
SD:200
10 or 20
YES -40 to +85
400 BGA 100
GS2962
270
1485
2970
YES YES YES NO YES
3G:40
HD:50
SD:200
10 or 20
YES -40 to +85
350 BGA 100
GS1672
270
1485
YES YES YES YES YES
HD:50
SD:200 10 or 20
YES -40 to +85
350 BGA 100
GS1662
270
1485
YES YES YES NO YES
HD:50
SD:200 10 or 20
YES -40 to +85
330 BGA 100
SDI Transmitters
High-performance, integrated, low-power solution for SDI transmit links.
12 Semtech Broadcast Video Selector Guide • Fall 2017
GS3471
Serial
Loop-thru
Video
Pixel Clock
Timing
Audio Clock
Serial Digital
Audio Outputs
SDI
Input 1
Serial
Input 2
SDI
Equalizer
Input
Buffer
Clock
Generator
Audio
De-embedder
Output
Buffer
Loop-thru
Select
Input
Switch
Reclocker Deserializer
& Video
Processing
3Gbps SDI
The GS3470 and GS3471 are Semtech’s latest generation
high-performance, single-chip SDI receiver solutions,
featuring integrated cable equalization, video and audio
processing, and dual SDI inputs. All Semtech’s SDI receivers
are fully compatible with SMPTE ST 424 and ST 425 as
well as new ST 2081-1 and ST 2082-1 UHD-SDI standards.
The GS3470 and GS3471 feature two selectable serial
video inputs which make them ideal for video monitoring
applications. Both parts are optimized for low-power
designs, providing up to 45% power reduction over
previous generation SDI receivers.
INTEGRATED EQUALIZER
The GS3471 fully integrates a high-performance long
reach adaptive cable equalizer, providing up to 200m reach
at 3Gbps. The integration of the cable equalizer reduces
overall PCB component footprint and power.
COMPLETE VIDEO PROCESSING
Semtech’s SDI receivers offer integrated SMPTE video
processing including descrambling, word alignment,
comprehensive error detection and correction, and ancillary
data extraction. Additionally, all Semtech SDI receivers fully
support DVB-ASI inputs.
AUDIO DE-EMBEDDING
The GS3470 and GS3471 include an integrated SMPTE
compliant audio de-embedder, supporting AES, I2S and
serial digital audio output formats. Both parts feature a
high performance audio clock generator, further reducing
overall system costs.
APPLICATIONS
Monitors, camera control units, multi-viewers, routers,
production switchers, master control switchers, video
recorders and servers, compression encoders and decoders,
video format converters, audio de-embedders, test, and
measurement equipment.
SDI RECEIVERS
Part
Number
Data Rate
(Mbps)
Integrated
Equalizer
Number of SDI
Inputs
Audio
De-embed
Audio Clock
Generator
I/O Supply
Voltage
(V)
Power
(mW)
Package
(mm)
GS3471
270, 1485, 2970
Yes
2Yes Yes 1.8 or 2.5 300 BGA 100 (9x9)
GS3470
270, 1485, 2970
No
2Yes Yes 1.8 or 2.5 220 BGA 100 (9x9)
GS2971A
270, 1485, 2970
Yes
1Yes Yes 1.8 or 3.3 525 BGA 100 (11x11)
GS2961A
270, 1485, 2970 Yes
1No No 1.8 or 3.3 500 BGA 100 (11x11)
GS2970A
270, 1485, 2970
No
1Yes Yes 1.8 or 3.3 350 BGA 100 (11x11)
GS2960A
270, 1485, 2970 No
1No No 1.8 or 3.3 320 BGA 100 (11x11)
GS1661A
270, 1485 Yes
1No No 1.8 or 3.3 460 BGA 100 (11x11)
GS1660A
270, 1485
No
1No No 1.8 or 3.3 250 BGA 100 (11x11)
SDI Receivers
High-performance, integrated, low-power solution for SDI receive links.
www.semtech.com 13
CROSSPOINT SWITCHES
Part
Number
Data
Rate
(Gbps)
Inputs
Input
Sensitivity
(mV)
Input
Trace
EQ
Outputs Output
De-emphasis
DC Coupling Temp Range
(ºC)
Power
(W)
Package
(mm)
GX3290
3.5 290 80 YES 290
YES
1.2V, 1.8V, 2.5V 0 to +85
34
BGA 2377 (50x50)
GX3190
3.5 146 80 YES 290
YES
1.2V, 1.8V, 2.5V 0 to +85 25 BGA 2377 (50x50)
GX3246
3.5
290
80 YES
146 YES
1.2V, 1.8V, 2.5V 0 to +85
18
BGA 2377 (50x50)
GX3202
3.5 202
80 YES
202 YES
1.2V, 1.8V, 2.5V 0 to +85
24
BGA 2377 (50x50)
GX3146
3.5 146 80
YES
146 YES
1.2V, 1.8V, 2.5V 0 to +85
18
BGA 2377 (50x50)
MULTIPLE STROBES
Eight update enabled strobe pins allow our crosspoint to
be partitioned into independently updatable blocks. This
is useful in multi-format environments when the switches
need to occur at different points in time. Each update
strobe can be assigned on a per-output basis, enabling
maximum flexibility.
DATA RATE MARGIN
Supporting data rates up to 3.5Gbps means that there
is significant margin for video systems operating up to
2.97Gbps. This margin also means the product can be used
in Xaui™, DisplayPort™ and HDMI switching applications.
FULLY INDEPENDENT INPUT AND OUTPUT CHANNELS
All our crosspoints provide independent input trace
equalization and output de-emphasis which can
compensate for over 50 inches of PCB trace loss. This
provides higher signal integrity and lower jitter in designs
utilizing long traces or passive splitting. In addition, with
output swing configurable as low as 200mV, system power
can be significantly reduced.
ON-CHIP PATTERN GENERATORS
EYE PATTERN DIAGNOSTICS
Independent pattern generators and checkers can be
used for testing signal paths on either the input or
output side of the system. The pattern checker can be
configured to check for bit errors using one of three PRBS
patterns or any arbitrary pattern, important for evaluating
system performance with video pathological signals. All
crosspoint devices can check for bit errors at arbitrary phase
offsets from the received data, and jitter margin can be
determined by measurement of the horizontal eye opening.
TEMPERATURE SENSORS
Four on-chip temperature sensors monitor the junction
temperature of the chip. This enables automated control
of fan speed and power down sequences to meet
environmental demands for energy conservation.
LOW-POWER
When compared to competitive solutions, Semtech
crosspoints provide industry leading per channel power
consumption with less than 1W consumed in stand-by
mode. System power can be reduced further by taking
advantage of the crosspoint’s high input sensitivity while
using Semtech equalizers configured for minimum output
swing levels.
FLEXIBLE FOOTPRINT
All Semtech crosspoints are pin compatible, sharing the
same control interface and register set. This allows a single
platform design to be easily scaled to the necessary switch
size with no re-work required in either hardware or software.
INPUT SENSITIVITY
To address losses typical in many router architectures,
the Semtech crosspoint family provides for high input
sensitivity, resulting in additional system margin. In
addition, high input sensitivity facilitates better system
optimization, including reduced swing on upstream drivers,
providing substantial power savings.
APPLICATIONS
Routers, multi-viewers, production switchers, master
control switchers, and broadcast modular equipment.
SDI Crosspoints
Semtech crosspoint switches provide an unmatched combination of size, features
and performance.
14 Semtech Broadcast Video Selector Guide • Fall 2017
CLOCK GENERATORS
Part
Number
Input Video
Standard
Output Video
Standard
Max Output
Video Clock
(MHz)
Power
Supply
(V)
Genlock Audio
Clocks
User
Programmable
Power
(mW)
Package
(mm)
GS4900B 3G/HD/SD/
Graphics SD 54 3.3, 1.8 YES NO NO 215 QFN-64 (9x9)
GS4901B 3G/HD/SD/
Graphics SD 54 3.3, 1.8 YES YES NO 265 QFN-64 (9x9)
GS4910B 3G/HD/
SDGraphics
3G/HD/SD/
Graphics 165 3.3, 1.8 YES NO YES 250 QFN-64 (9x9)
GS4911B 3G/HD/SD/
Graphics
3G/HD/SD/
Graphics 165 3.3, 1.8 YES YES YES 300 QFN-64 (9x9)
GENLOCK CAPABILITY
GS4900B/GS4901B/GS4910B/GS4911B clock generators
can be genlocked to reference with a variable offset. On
loss of reference, the video clocks will flywheel to maintain
their frequency.
GENERATES MULTIPLE CLOCKS
Three video clocks (two single-ended and one differential),
three single-ended audio clocks, and eight single-ended
configurable timing signals can be generated. Video clocks
up to 165MHz can be produced in order to support up to
3Gbps SDI and UXGA. In addition, the GS4911B features
crosslocking capability where HD timing can be generated
from an SD reference, increasing design flexibility.
INPUT STANDARD DETECTION
By supplying the clock generator with HSync, VSync and
FSync, the chip will determine if it matches one of 36 video or
16 graphics standards and will report the detected standard.
REDUCES JITTER TO MEET SMPTE SPECS
The GS4915 ClockCleaner™ will reduce jitter on
video clocks of 27, 74.25, 74.25/1.001, 148.5, and
148.5/1.001MHz. Output jitter will typically be 20ps, which
will guarantee 3Gbps SDI compliance when used with a SDI
transmitter.
FLEXIBLE I/O FREQUENCIES AND LEVELS
SD (27MHz) and HD (74.25, 74.25/1.001, 148.5, and
148.5/ 1.001MHz) frequencies can be input and output
from the GS4915. The chip also has single-ended and
differential inputs and outputs to facilitate interfacing with a
variety of chips.
FREQUENCY DOUBLER TO MEET 3Gbps SDI REQUIREMENTS
If the input clock frequency is 74.25 or 74.25/1.001MHz,
the GS4915 can double the output, providing a low jitter
148.5 or 148.5/1.001MHz output clock which can be used
for HD-SDI and 3Gbps SDI applications.
GS4911B
HSync
VSync
FSync
8 Video
Timing
Signals
Detected
Standard
3 Audio Clocks
3 Video
Clocks
2 S/E, 1 Di
Standard
Detection
Timing Signal
Generation
Audio Clock
Generation
Video Clock
Generation &
Timing Oset
X-point
Delay
Adjust
GS4915
PCLK
PCLK
Clean
Clock
Clean
Clock
Di
Input
Single
Ended
Input
External
GO1555
Frequency
Detection/Selection,
Bypass, Skew Control
PLL
Timing (GEN-Clocks)
A complete timing solution for broadcast video.
We offer value
Semtech pledges to provide always improving value to customers with innovative and technically superior
products and services that exceed expectations. Our qualification systems strive to guarantee the quality
and reliability of our products, processes and suppliers to ensure they meet specifications. With increasing
environmental concerns, Semtech supports the voluntary reduction and subsequent elimination of lead in
electronics products, including component lead finishes.
Find out more: www.semtech.com/quality
Innovative
Superior
Products
Environmental
Initiatives
Failure Analysis
Assistance
Service
that Exceeds
Expectations
and quality that can be trusted.
A SEMTECH CUSTOMER
DEMANDS BETTER
& EXPECTS MORE
Trusted
Quality
Semtech and the Semtech logo are registered marks of Semtech Corporation. All other trademarks and trade names mentioned may be marks and names of their respective companies. Semtech
reserves the right to make changes to, or discontinue any products described in this document without further notice. Semtech makes no warranty, representation or guarantee, express or implied,
regarding the suitability of its products for any particular purpose. ©2017 Semtech Corporation. All rights reserved. Broadcast-SG17
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