Gennum Video Broadcast Guide

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UHD-SDI
FEATURING 2017 New UHD-SDI Solutions

Broadcast Video Selector Guide
•
•
•
•

Equalizers
Cable Drivers
Reclockers
Configurable Input/Output Devices

www.semtech.com

• Gearbox
• Transmitters
• Receivers

• Crosspoint Switches
• Timing (GEN-Clocks)

High-Performance

UHD-SDI Products

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

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.

Equalizers
Integrated retiming, low-power, long reach, and support for data rates up
to 11.88Gbps.
SUPPORT UHD-SDI RATES UP TO 12G

ADVANCED SIGNAL INTEGRITY DIAGNOSTICS

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.

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.

LOW-POWER AND SMALL PACKAGE SIZE

CROSSTALK INTERFERENCE ROBUSTNESS

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.

The advanced design minimizes the effect of inter-channel
crosstalk interference in high channel-density applications.

INTEGRATED RETIMING/RECLOCKING, LOWEST JITTER

The GS12241’s integrated retimer ensures low output jitter,
even at extended cable lengths.

CS

SCLK

SDIN SDOUT

GPIO0 GPIO1 GPIO2 GPIO3

Control & Status

Retimer

SDI

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.

Selection per
Output:
Retimed Data
Bypass Data
PRBS Gen

Adaptive
Cable
Equalizer

Trace Driver
with
Preemphasis

DDO0

Trace Driver
with
Preemphasis

DDO1

PRBS
Checker

Eye
Monitor

GS12241

NEW

EQUALIZERS
Part
Number

Data Rate
(Mbps)

Input Output
of
0/6dB Coupling No.
Inputs
gain
(V)

GS12241

1–11880

YES*

1.2–2.5

1

GS12142**

1–11880

YES*

1.2–2.5

GS12141

1–11880

YES*

GS3241**

1–2970

GS3140

No. of
Outputs

Cable Length (m)

Temp Range
(ºC)

Power
(mW)

Package
(mm)

12G

6G

3G

HD

SD

2

80

100

190

260

450

-40 to +85

385***

QFN-40 (6x4)

2

2

80

100

190

260

450

-40 to +85

385***

QFN-40 (6x4)

1.2–2.5

1

2

70

90

190

260

450

-40 to +85

320***

QFN-40 (6x4)

YES*

1.2–2.5

1

2

–

–

200

280

400

-40 to +85

385***

QFN-40 (6x4)

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
4

Semtech Broadcast Video Selector Guide • Fall 2017

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.
MULTI-RATE

BEST OUTPUT RETURN LOSS

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.

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.

INTEGRATED RETIMING/RECLOCKING

The GS12281’s integrated retimer enables the best jitter
performance at all rates up to 11.88Gbps.
ADVANCED SIGNAL INTEGRITY DIAGNOSTICS

CS

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.

SCLK

SDIN SDOUT

GPIO0 GPIO1 GPIO2 GPIO3

Control & Status

Retimer

DDI

Selection per
Output:
Retimed Data
Bypass Data
PRBS Gen

Trace
Equalizer

INPUT TRACE EQUALIZATION

Cable Driver
with
Preemphasis

SDO0

Cable Driver
with
Preemphasis

SDO1

PRBS
Checker

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.

Eye
Monitor

GS12281

NEW

CABLE DRIVERS
Part
Number

Power No. of No. of Input Max Output
Data Rate Power Supply
Swing
(Mbps)
(mW)
Inputs Outputs Trace
(V)
EQ
(mV)

GS12281

Circuit
Compatible
with

Temp Range
(ºC)

Package
(mm)

1000

12G:-10
6G:-10
3G:-15
HD:-19

GS12181
GS12081
GS12090

GS3281
GS3590

-40 to +85

QFN-40
(6x4)

1000

12G:-10
6G:-10
3G:-15
HD:-19

GS12281
GS12181

GS12081
GS3281

-40 to +85

QFN-40
(6x4)

GS12281
GS12081
GS12090

GS3281
GS3590

-40 to +85

QFN-40
(6x4)

GS12281
GS12181
GS12090

GS3590
GS3281

-40 to +85

QFN-40
(6x4)

GS12281
GS12181
GS12081

GS12090
GS3590

-40 to +85

QFN-40
(6x4)

GS2988

-40 to +85

QFN-16
(4x4)

GS2989

-40 to +85

QFN-16
(4x4)

1–11880

**

360

1.8,
2.5

1

2

YES

GS12182*

1–11880

360**

1.8,
2.5

2

2

YES

GS12181

1–11880

310

1.8,
2.5

1

2

YES

1000

GS12081*

1 -11880

170

1.8,
2.5

1

2

YES

1000

GS3281*

1–2970

360**

1.8,
2.5

1

2

YES

1000

GS6080

143–5940

135

2.5
or
3.3

1

2

YES

1800

GS6081

143–5940

205

2.5
or
3.3

1

4

YES

1800

**

ORL
(dB)

12G:-10
6G:-10
3G:-15
HD:-19
12G:-10
6G:-10
3G:-15
HD:-19
3G:-15
HD:-19
6G:-10
3G:-15
HD:-19
6G:-10
3G:-15
HD:-19

*GS12182, GS12081 and GS3281 specifications are preliminary and subject to change. **Power specifications include power consumed by integrated retimer
www.semtech.com

5

Reclockers
Industry’s best-performing reclockers.
ADVANCED SIGNAL INTEGRITY FEATURES

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.

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 preemphasis provide flexibility for managing signal integrity of
the output signals.

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.
CS

SCLK

SDIN SDOUT

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.

GPIO0 GPIO1 GPIO2 GPIO3

LOW-POWER
Control & Status

DDI0

DDI1

Trace
Equalizer

Trace
Equalizer

Input Select

Retimer
Selection per
Output:
Retimed Data
Bypass Data
PRBS Gen

Trace Driver
with
Preemphasis

DDO0

Trace Driver
with
Preemphasis

DDO1

The GS12150’s low-power consumption is ideal for designs
with high channel density or in applications where lowpower consumption is a critical design requirement.

PRBS
Checker

Eye
Monitor

GS12150

NEW

RECLOCKERS
Power Integrated
Supply Eye
Monitor
(V)

Output
Jitter
(UI)

Input
Trace
EQ

YES

12G:0.08
6G:0.05
3G:0.04
HD:0.03
SD:0.03

YES

YES

2:1

2

1.8

YES

6G:0.13
3G:0.09
HD:0.06
SD:0.03

YES

YES

2:1

1.8

YES

6G:0.13
3G:0.09
HD:0.06
SD:0.03

YES

YES

4:1

Part
Number

Data Rate
(Mbps)

GS12150*

11880
5940
2970
1485
270

1.8

GS6151

5940
2970
1485
270

GS6152

5940
2970
1485
270

Temp
Range
(ºC)

Power
(mW)

Package
(mm)

2

-40 to +85

385

QFN-40
(6x4)

2

2

-40 to +85

130

QFN-32
(4x4)

4

2

-40 to +85

130

QFN-48
(6x6)

Output Pre-/ Input
No. of
De-emphasis MUX No. of Inputs Outputs

*GS12150 specifications are preliminary and subject to change.

6

Semtech Broadcast Video Selector Guide • Fall 2017

Configurable SDI Input/Output Equalizer/Cable Driver
High-performance configurable devices for multi-rate applications up to 12Gbps.
DESIGN FLEXIBILITY

ADVANCED SIGNAL INTEGRITY DIAGNOSTICS

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 multifunction designs requiring connectors be reconfigurable
based on a given customer’s needs.

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.

Applications suitable for the GS12090 include nextgeneration 3G, 6G, and 12G UHD-SDI infrastructures
designed in support of UHDTV1, UHDTV2, 4K D-Cinema,
and 3D HFR and HDR production image formats.

CSb

SCLK

SDIN

SDOUT

GPIO0

GPIO1

GPIO2

GPIO3

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.

Control & Status
Selector
Cable
Equalizer
Slicer

Trace
Equalizer

DDI

Trace
Driver

DDO

Eye Monitor

SDIO

Cable
Driver
Pre-emphasis

Data/
Bypass/
PRBS

Retimer

Data/
Bypass/
PRBS/
CLK

Pre-emphasis

GS12090

CONFIGURABLE SDI INPUT/OUTPUT - EQUALIZER/CABLE DRIVER
Part
Number

Integrated
Retiming

Circuit
Compatible
with

YES

GS3590
GS12181
GS12281
GS12081
GS3281

YES

-40 to +85

QFN-40 (6x4)

3G:160
HD:240
SD:300

YES

GS12090
GS12181
GS12281
GS12081
GS3281

YES

-40 to +85

QFN-40 (6x4)

3G:140
HD:260
SD:500

NO

–

YES

-40 to +85

QFN-32 (5x5)

Data Rate
(Mbps)

Power
(mW)

No. of
Outputs

Cable Reach
(m)

1–11880

EQ: 460**
CD: 390**

EQ: 1
CD: 1

12G:60
6G:80
3G:160
HD:240
SD:300

GS3590

1–2970

EQ: 460**
CD: 390**

EQ: 1
CD: 1

GS3490

125–2970

EQ: 202
CD: 215

EQ: 1
CD: 1

GS12090

*

*

DVB-ASI Temp Range
and MADI
(ºC)

Package
(mm)

*GS12090 and GS3590 specifications are preliminary and subject to change. **Power specifications include power consumed by integrated retimer.

www.semtech.com

7

UHD-SDI Gearbox
Single-chip UHDTV SDI link rate conversion.
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.

ROBUST RECEIVE SOLUTION

The GS12070 features 100ohm differential serial interfaces,
allowing connection to Semtech equalizers, cable drivers as
well as optical modules.

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.

SINGLE-CHIP CONVERSION

FLEXIBLE DISTRIBUTION MODES

The GS12070 can be conveniently configured for both
multiplex and de-multiplex modes via mode select pins.

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.

GEARBOX MODES
12Gbps



Quad 3Gbps

12Gbps



Dual 6Gbps*

6Gbps



Dual 3Gbps*

6Gbps



Quad 1.5Gbps

3Gbps



Dual 1.5Gbps*

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

•
•
•
•
•
•

* Two conversions can be performed simultaneously.

Multiplex/Demultiplex for 3G router applications
UHD-SDI distribution amplifier
4:11:4 selector
UHD-SDI crosspoint applications
12G UHD-SDI interfacing
SDI link concatenation

UHD-SDI GEARBOX

8

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

Semtech Broadcast Video Selector Guide • Fall 2017

UHD-SDI Gearbox
Single-chip UHDTV SDI rate conversion.

DDI0
DDI0

Video
Detection

Tx

Rx

Video
Detection

Tx

DDI1
DDI1

DDI2
Rx
DDI2

DDI3
DDI3

DDO0

Rx

Rx

Video
Detection

Video
Detection

DDO0

DDO1
MUX/
DEMUX
PID and
CRC
Handling

Output

DDO1

Crosspoint
DDO2
Tx

DDO2

DDO3
Tx

DDO3

Ref clk
Xtal
Control, GSPI

www.semtech.com
www.semtech.com

9

9

Complete Solution Transmitter/Receiver
Complete

SDI Input

EQ+Receiver
EQ

11

Receiver

Low-End FPGA
Spartan 3A, Cyclone III

Complete

Proprietary Customer
Logic

Transmitter
w/CD

11

SDI Output

SDI Transmitters and Receivers
Choose the right SDI transmitter and SDI receiver for your system.

EQ

Receiver

SDI Input
Reclocker

Proprietary Customer Logic
Digital
SMPTE processing

SDI Output
CD

Complete Solution Transmitter/Receiver
FPGA-HELPER ARCHITECTURE
SDI Input

Low-End FPGA

Complete

Complete

3A, Cyclone IIIbelow, involves
The FPGA-helper
architecture, Spartan
as depicted
EQ+Receiver
Transmitter
Proprietary Customer
11
11
the use of a component
w/CD
Logicthe physical media
EQ Receiver that includes
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
FPGA-Helper
SERDES parts are
lacking even basic SMPTE digital
processing.
High-End FPGA

Virtex 5, Stratix II

SDI Input

Partial

Partial

SDI Output

SDI Output

Proprietary Customer Logic
In many cases, product specific
FPGA IP already requires
EQ
Receiver
IntegratedDigital
Transceiver FPGAs Transmitter
12
w/CD
12
high utilization factors in small,
low-cost
SMPTE
processing FPGAs, and the
High-End FPGA
added requirementVCXO
of digital SMPTE
video
Virtex 5, Stratix
II GX processing
SDI Input
SDI Output
Proprietary
LogicFPGA. This
in the FPGA may drive adoption
of aCustomer
larger
EQ
CD
Reclocker
Digital
results in further penalties in power
consumption, size
SMPTE processing
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.
Transmitter

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-tomarket. Only Semtech offers a solution that scores high for
each evaluation parameter.

High-End FPGA
Virtex 5, Stratix II GX

VCXO

Receiver

SEMTECH’S COMPLETE SOLUTION ARCHITECTURE

Integrated Transceiver FPGAs

Transmitter

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 integratedtransceiver 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-tomarket, system size, and cost.

FPGA-Helper SERDES

Complete Solution Transmitter/Receiver
Low-End FPGA
Spartan 3A, Cyclone III

Complete

SDI Input

EQ+Receiver
EQ

Receiver

Proprietary Customer
Logic

11

Complete
11

SDI Output

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
Integrated
Transceiver
SMPTE standards
and, in some
cases,FPGAs
actually in violation
of industry VCXO
norms. That isHigh-End
why FPGA
extra components, namely
Virtex 5, Stratix II GX
VCXOs and reclockers, are required to get the system
SDI Output
Proprietary Customer Logic
jitter
performance
to an acceptable level. This CD
comes at a
EQ
Reclocker
Digital
processing
penalty of higher powerSMPTE
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.
Receiver

Transmitter

10

FPGA-Helper SERDES
High-End FPGA
Virtex 5, Stratix II

Partial

EQ

Receiver

Transmitter
w/CD

INTEGRATED-TRANSCEIVER FPGA ARCHITECTURE

SDI Input

High-End FPGA
Virtex 5, Stratix II

SDI Input

Partial

Proprietary Customer Logic
Digital
SMPTE processing

12

12

SDI Output

Transmitter
w/CD

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.
Semtech
Complete
Solution

Integrated
Transceiver
FPGA

FPGA-Helper
SerDes

Jitter Performance
Time-to-Market
Power Consumption
Integration
Overall PCB Space
System Cost
Semtech Broadcast Video Selector Guide • Fall 2017

SDI Transmitters
High-performance, integrated, low-power solution for SDI transmit links.
3Gbps SDI

EXCELLENT JITTER PERFORMANCE

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.

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.

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.

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.

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

Pclk

All Semtech SDI transmitters are DVB-ASI capable.

Video

Narrow
LBW PLL
Video
Processing

Timing

AUDIO EMBEDDING

Semtech’s SDI transmitters include an integrated audio
embedder supporting AES, I2S and serial audio formats.

Audio

Serializer

SDI
Output

Cable
Driver

Audio
Embedder
GS2972

SDI TRANSMITTERS
Part
Number

Data Rate
(Mbps)

Video
Processing

DVB/
ASI

Ancillary
Data
Insert

Audio
Embed

Cable
Driver

Output
Jitter (ps)

Parallel
Bus
Width

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

www.semtech.com

CEA Temp Range Power
861
(ºC)
(mW)
Timing

Package

11

SDI Receivers
High-performance, integrated, low-power solution for SDI receive links.
3Gbps SDI

AUDIO DE-EMBEDDING

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.

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.

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.

SDI
Input 1

Serial
Input 2

Video
Pixel Clock
Timing

SDI
Equalizer

Reclocker
Input
Switch

Input
Buffer

Deserializer
& Video
Processing

Clock
Generator

Audio
De-embedder

Loop-thru
Select

Output
Buffer

Audio Clock

Serial Digital
Audio Outputs

Serial
Loop-thru

GS3471

SDI RECEIVERS

12

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

2

Yes

Yes

1.8 or 2.5

300

BGA 100 (9x9)

GS3470

270, 1485, 2970

No

2

Yes

Yes

1.8 or 2.5

220

BGA 100 (9x9)

GS2971A

270, 1485, 2970

Yes

1

Yes

Yes

1.8 or 3.3

525

BGA 100 (11x11)

GS2961A

270, 1485, 2970

Yes

1

No

No

1.8 or 3.3

500

BGA 100 (11x11)

GS2970A

270, 1485, 2970

No

1

Yes

Yes

1.8 or 3.3

350

BGA 100 (11x11)

GS2960A

270, 1485, 2970

No

1

No

No

1.8 or 3.3

320

BGA 100 (11x11)

GS1661A

270, 1485

Yes

1

No

No

1.8 or 3.3

460

BGA 100 (11x11)

GS1660A

270, 1485

No

1

No

No

1.8 or 3.3

250

BGA 100 (11x11)

Semtech Broadcast Video Selector Guide • Fall 2017

SDI Crosspoints
Semtech crosspoint switches provide an unmatched combination of size, features
and performance.
MULTIPLE STROBES

TEMPERATURE SENSORS

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.

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

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.

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.

FULLY INDEPENDENT INPUT AND OUTPUT CHANNELS
FLEXIBLE FOOTPRINT

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.

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

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.

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.

CROSSPOINT SWITCHES
Part
Number

Data
Rate
(Gbps)

Inputs

Input
Sensitivity
(mV)

Input
Trace
EQ

GX3290

3.5

290

80

YES

290

GX3190

3.5

146

80

YES

GX3246

3.5

290

80

GX3202

3.5

202

GX3146

3.5

146

www.semtech.com

Output
Outputs De-emphasis

DC Coupling

Temp Range
(ºC)

Power
(W)

Package
(mm)

YES

1.2V, 1.8V, 2.5V

0 to +85

34

BGA 2377 (50x50)

290

YES

1.2V, 1.8V, 2.5V

0 to +85

25

BGA 2377 (50x50)

YES

146

YES

1.2V, 1.8V, 2.5V

0 to +85

18

BGA 2377 (50x50)

80

YES

202

YES

1.2V, 1.8V, 2.5V

0 to +85

24

BGA 2377 (50x50)

80

YES

146

YES

1.2V, 1.8V, 2.5V

0 to +85

18

BGA 2377 (50x50)

13

Timing (GEN-Clocks)
A complete timing solution for broadcast video.
GENLOCK CAPABILITY

REDUCES JITTER TO MEET SMPTE SPECS

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.

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.

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.

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

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.

Detected
Standard

Standard
Detection

HSync
VSync
FSync

Timing Signal
Generation

Video Clock
Generation &
Timing Offset

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.

External
GO1555

PCLK

8 Video
Timing
Signals

X-point

Diff
Input
PLL

PCLK

3 Video
Clocks
2 S/E, 1 Diff

Delay
Adjust

Audio Clock
Generation

Clean
Clock
Clean
Clock

Single
Ended
Input

Frequency
Detection/Selection,
Bypass, Skew Control

GS4915

3 Audio Clocks

GS4911B

CLOCK GENERATORS

14

Part
Number

Input Video
Standard

Output Video
Standard

Max Output
Video Clock
(MHz)

Power
Supply
(V)

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)

Audio
User
Power
Genlock Clocks
Programmable (mW)

Package
(mm)

Semtech Broadcast Video Selector Guide • Fall 2017

A SEMTECH CUSTOMER

DEMANDS BETTER
& EXPECTS MORE

We offer value

and quality that can be trusted.
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.

Innovative
Superior
Products

Service
that Exceeds
Expectations

Trusted
Quality

Environmental
Initiatives

Failure Analysis
Assistance

Find out more: www.semtech.com/quality

SEMTECH CORPORATION
Semtech Corporation is a leading supplier of high performance
analog, mixed-signal semiconductors and advanced algorithms
for high-end consumer, enterprise computing, communications,
and industrial equipment. Semtech, publicly traded since 1967,
is listed on the Global Select Market under the symbol SMTC
and has more than 32 sales and application support offices in
14 countries as well as representatives and distribution support
locations in more than 30 countries.

These markets include smartphones, LCD TVs, notebooks,
tablets, smart grid, automotive, automatic meter reading,
medical, wireless infrastructure, PON, Internet of Things,
optical transport, and datacenters. More than 5,000 customers
worldwide rely on our diverse product portfolio and world
class technology roadmap for solutions in low-power wireless
communications, optical data transport, video broadcasting,
power management, circuit protection, touch sensing, and more,
making Semtech one of the most balanced semiconductor
companies in the industry.

Semtech is dedicated to providing proprietary platforms,
differentiated by innovation, size, efficiency, performance, and
reach. Our solutions are used in some of the most innovative
systems and products in the fastest growing markets today.

CUSTOMER CONTACT & KEY SALES OFFICES
CORPORATE
HEADQUARTERS
Camarillo, California
805-498-2111
NORTH AMERICA
San Jose, California
408-324-3300
San Diego, California
858-614-6700
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972-231-1606
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289-856-9200

EUROPE

ASIA

Rapperswil, Switzerland
+ 41-71-313-4828

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+ 82-2-527-4377

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+ 44-1454-462200

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+ 81-3-5719-7560

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+ 33-169-282200

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+ 81-6-6133-4510

Hallbergmoos, Germany
+ 49-811-998-728-0

Beijing, China
+86-10-6410-6855
Shanghai, China
+ 86-21-6391-0830

Taipei, Taiwan
+ 886-2-2748-3380
Manila, Philippines
+ 63-2-772-1834
Ipoh, Malaysia
+ 60-5-501-4800
Penang, Malaysia
+ 60-4-683-8200
Bhubaneswar, India
+ 91-674-398-1400

For a detailed list of sales
representatives for your area,
please visit
www.semtech.com/contact
find us, like us, follow us

Shenzhen, China
+ 86-755-8282-8515

Saint-Laurent, Quebec
514-908-9768

visit www.semtech.com for more
200 Flynn Road, Camarillo, California 93012

•

phone: (805) 498-2111

•

fax: (805) 498-3804

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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