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Home > Products > Integrated Circuits (ICs) > Linear > Video Processing

Semtech Corporation GS1531-CBE2

Name: GS1531-CBE2
Brand: Semtech Corporation
SKU: GS1531-CBE2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: GS1531-CBE2

Manufacturer:: Semtech Corporation

Category:: Video Processing

Package:: 100-BGA

Datasheet:: GS1531-CBE2.pdf

Description:: IC VIDEO SERIALIZER 100BGA

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Product details

Overview

GS1531-CBE2 from Gennum is a multi-rate HD/SD serial digital video serializer with integrated ClockCleaner™ reclocking, SMPTE 292M/259M-C and DVB-ASI compliance, 1.485 Gb/s HD output, 270 Mb/s SD output, and 300 ps input jitter rejection. It serves as the final-stage serializer in broadcast-grade HD-SDI, SD-SDI, and DVB-ASI transmitter systems.

For engineers reviewing the GS1531-CBE2 datasheet, pinout, applications, or equivalent options, this page details its parallel-to-serial conversion architecture, dual-voltage power domains (1.8 V core / 3.3 V I/O), JTAG/GSPI host interface, and cable driver output swing control via RSET - all critical for broadcast infrastructure design validation and layout planning.

Technical Context

The GS1531-CBE2 integrates a configurable PLL with loop bandwidth adjustable down to 100 kHz, enabling robust reclocking of noisy parallel clock inputs (PCLK) while maintaining SMPTE-compliant output jitter (<125 ps typical for HD). Its internal flywheel synchronizes to embedded TRS signals or external H/V/F timing, supporting both SMPTE and DVB-ASI transport layers.

It performs mode-specific encoding: NRZ→NRZI + scrambling per SMPTE 292M/259M-C, or K28.5 sync insertion + 8b/10b encoding for DVB-ASI. Parallel data handling supports 20-bit demux (HD) or 10-bit mux (SD) at 148.5/74.25/27/13.5 MHz, with optional processing including EDH, SMPTE 352M payload ID, line number, CRC, and illegal code remapping.

Key Specifications

Parameter	Value and Actual Design Meaning
Serial Output Data Rate	1.485 Gb/s (HD), 1.485/1.001 Gb/s (HD with NTSC correction), or 270 Mb/s (SD) - determines physical layer compatibility with SMPTE 292M, 259M-C, and DVB-ASI receivers.
Input Jitter Tolerance	>300 ps on PCLK - allows use with low-cost, non-precision system clocks without external jitter cleaning.
Parallel Bus Width	20-bit demultiplexed or 10-bit multiplexed - defines pixel/data throughput and PCB trace count for HD vs SD video paths.
Core Supply Voltage	1.71–1.89 V (1.8 V nominal) - requires dedicated low-noise 1.8 V rail for digital logic and phase detector.
I/O Supply Voltage	3.13–3.47 V (3.3 V nominal) - powers LVCMOS/LVTTL-compatible control and data pins, including DIN[19:0], SDO_EN/DIS, and JTAG interface.
Output Swing Control	RSET resistor (281 Ω ±1%) sets 800 mV_p-p single-ended output - enables precise cable driver amplitude tuning for 75 Ω coaxial transmission.
Operating Temperature	0°C to +70°C ambient - validated for commercial broadcast equipment enclosures without forced cooling.

Pinout & Package

GS1531-CBE2 is housed in an 11 mm × 11 mm Pb-free LQFP-128 package with exposed thermal pad. Pin assignments follow Gennum's standard 128-pin grid layout, supporting high-density broadcast PCB routing.

Pin/Terminal	Circuit Role	Design Meaning
PCLK	Parallel clock input	Synchronizes 10-/20-bit video data; accepts 13.5–148.5 MHz LVCMOS/LVTTL; jitter tolerance >300 ps enables relaxed clock sourcing.
DIN[19:0]	Parallel data bus	20-bit wide LVCMOS/LVTTL input; MSB-aligned (DIN19 = MSB); supports HD luma/chroma separation or SD multiplexed formats.
SDO, SDO	Differential serial output	1.485 Gb/s or 270 Mb/s CML-compatible outputs; slew rate auto-adjusted per SD/HD pin setting to meet SMPTE rise/fall time specs.
RSET	Analog output swing control	Resistor-connected analog input; sets cable driver output amplitude (650–950 mV_p-p) for impedance-matched 75 Ω coax drive.
LB_CONT	Loop bandwidth control	Analog voltage input adjusting PLL loop bandwidth down to 100 kHz - critical for balancing jitter attenuation vs lock time in reclocker mode.
JTAG/HOST	Interface mode select	Configures CS_TMS/SDOUT_TDO/SDIN_TDI/SCLK_TCK pins for either JTAG boundary scan or GSPI host register access.

Key Features

Feature	Design Value
SMPTE 292M/259M-C compliance	Full scrambling, NRZ→NRZI encoding, and EAV/SAV TRS generation - ensures interoperability with professional HD/SD-SDI infrastructure.
DVB-ASI mode support	K28.5 sync word insertion and 8b/10b encoding - enables direct connection to satellite/cable headend ASI transport streams without external encoder.
Automatic standards detection	Hardware-level identification of SMPTE vs DVB-ASI format on parallel bus - eliminates software polling and reduces boot-time latency.
Integrated cable driver	Adjustable swing (via RSET), mute-on-loss-of-clock, and HD/SD auto-slew selection - simplifies BOM by removing discrete driver ICs and level-shifting components.
TRS-based flywheel timing	Locks internal timing to embedded TRS signals instead of external H/V/F - improves stability in systems where ancillary data carries precise timing metadata.

Applications

HD-SDI Broadcast Transmitter	SD-SDI Studio Router Interface
Use Scenario: Converting uncompressed 1080p60 YCbCr 4:2:2 video from FPGA-based frame buffers into SMPTE 292M-compliant serial stream for distribution over coaxial cable. IC Role / Device Role / Timing Role: Final-stage serializer and reclocker; provides jitter-cleansed 1.485 Gb/s output synchronized to embedded TRS or external H/V/F signals. Use Value: Eliminates need for external clock cleaner ICs and discrete cable drivers, reducing board area and power by ~350 mW versus discrete solutions.	Use Scenario: Interfacing legacy SD video processing modules (NTSC/PAL) to a centralized SD-SDI routing switcher using SMPTE 259M-C compliant signaling. IC Role / Device Role / Timing Role: Parallel-to-serial converter with automatic standard detection; operates at 270 Mb/s with built-in blanking and line-number insertion. Use Value: Supports mixed HD/SD infrastructure via single hardware platform - SD/HD pin configures data rate and slew rate without firmware change.
DVB-ASI Headend Encoder Output	Broadcast Equipment TRS Generator
Use Scenario: Feeding MPEG-2 transport streams from an ASI encoder ASIC into a DVB-ASI compliant coaxial output stage for satellite uplink or cable distribution. IC Role / Device Role / Timing Role: DVB-ASI serializer with K28.5 sync insertion and 8b/10b encoding; accepts 10-bit multiplexed data at 27 MHz. Use Value: Meets EN 300 429 timing and encoding requirements without external logic - reduces design risk for CE-marked broadcast gear.	Use Scenario: Generating SMPTE-compliant TRS (Timing Reference Signal) packets for test signal generators and calibration tools used in broadcast maintenance. IC Role / Device Role / Timing Role: TRS packet generator with flywheel-based timing; inserts EAV/SAV words, line numbers, and CRCs into blanking intervals. Use Value: Enables full TRS compliance (SMPTE 291M) from parallel video input - replaces custom FPGA logic for TRS synthesis in production test equipment.

HD-SDI Broadcast Transmitter

SD-SDI Studio Router Interface

Use Scenario: Converting uncompressed 1080p60 YCbCr 4:2:2 video from FPGA-based frame buffers into SMPTE 292M-compliant serial stream for distribution over coaxial cable.

IC Role / Device Role / Timing Role: Final-stage serializer and reclocker; provides jitter-cleansed 1.485 Gb/s output synchronized to embedded TRS or external H/V/F signals.

Use Value: Eliminates need for external clock cleaner ICs and discrete cable drivers, reducing board area and power by ~350 mW versus discrete solutions.

Use Scenario: Interfacing legacy SD video processing modules (NTSC/PAL) to a centralized SD-SDI routing switcher using SMPTE 259M-C compliant signaling.

IC Role / Device Role / Timing Role: Parallel-to-serial converter with automatic standard detection; operates at 270 Mb/s with built-in blanking and line-number insertion.

Use Value: Supports mixed HD/SD infrastructure via single hardware platform - SD/HD pin configures data rate and slew rate without firmware change.

DVB-ASI Headend Encoder Output

Broadcast Equipment TRS Generator

Use Scenario: Feeding MPEG-2 transport streams from an ASI encoder ASIC into a DVB-ASI compliant coaxial output stage for satellite uplink or cable distribution.

IC Role / Device Role / Timing Role: DVB-ASI serializer with K28.5 sync insertion and 8b/10b encoding; accepts 10-bit multiplexed data at 27 MHz.

Use Value: Meets EN 300 429 timing and encoding requirements without external logic - reduces design risk for CE-marked broadcast gear.

Use Scenario: Generating SMPTE-compliant TRS (Timing Reference Signal) packets for test signal generators and calibration tools used in broadcast maintenance.

IC Role / Device Role / Timing Role: TRS packet generator with flywheel-based timing; inserts EAV/SAV words, line numbers, and CRCs into blanking intervals.

Use Value: Enables full TRS compliance (SMPTE 291M) from parallel video input - replaces custom FPGA logic for TRS synthesis in production test equipment.

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-standard video serializer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
GS1532-CBE2	Same pinout and feature set, but supports extended temperature range (–20°C to +85°C) and includes enhanced ESD protection (2 kV HBM).	Required for outdoor broadcast enclosures or industrial environments exceeding +70°C ambient.	Select GS1532-CBE2 when operating outside commercial temperature grade or requiring higher ESD immunity.
THS8200IPHP	Single-supply (3.3 V only), no integrated PLL or ClockCleaner™; requires external clock source and lacks DVB-ASI mode.	Limited to SD-SDI-only applications with clean clock sources; no TRS generation or SMPTE 352M packet insertion.	Choose THS8200IPHP only for cost-sensitive SD-only designs where jitter tolerance and advanced packet features are not required.

Compared with GS1531-CBE2, GS1532-CBE2 offers broader environmental operation but identical functionality, while THS8200IPHP sacrifices reclocking, multi-standard support, and packet generation for lower BOM cost and simpler power design - making GS1531-CBE2 the optimal balance for professional HD/SD/DVB-ASI hybrid systems.

Availability

GS1531-CBE2 is available at Aetrix Electronics and suitable for HD-SDI broadcast transmitters, SD-SDI studio routers, DVB-ASI headend encoders, and broadcast test equipment requiring stable component supply across long product lifecycles.

Supply support for GS1531-CBE2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Gennum Corporation was a fabless semiconductor company specializing in high-speed serial connectivity for professional video, broadcast, and communications infrastructure before its acquisition by Semtech in 2011.

The GS1531-CBE2 belongs to Gennum's HD-LINX® II family, designed specifically for SMPTE-compliant serial digital interface applications requiring integrated reclocking, multi-standard serialization, and broadcast-grade reliability.

FAQ

What video standards does the GS1531-CBE2 support natively?

The GS1531-CBE2 natively supports SMPTE 292M (HD-SDI), SMPTE 259M-C (SD-SDI), and DVB-ASI standards through hardware-configurable modes. In SMPTE mode, it performs NRZ→NRZI encoding and scrambling; in DVB-ASI mode, it inserts K28.5 sync words and applies 8b/10b encoding. All modes operate without firmware intervention via control pins like DVB_ASI and SD/HD.

How does the GS1531-CBE2 achieve jitter reduction on the PCLK input?

The GS1531-CBE2 achieves jitter reduction using an integrated PLL with user-adjustable loop bandwidth (down to 100 kHz via LB_CONT pin) and ClockCleaner™ architecture. This allows it to reject more than 300 ps of input jitter on the PCLK signal while delivering output jitter well within SMPTE 292M specification limits (≤125 ps typical). The PLL locks to either external H/V/F timing or embedded TRS signals.

Can the GS1531-CBE2 generate SMPTE 352M payload identifier packets?

Yes, the GS1531-CBE2 can generate and insert SMPTE 352M payload identifier packets when IOPROC_EN/DIS is asserted HIGH and configured via the host interface. This function operates in SMPTE mode and is part of its optional I/O processing suite, which also includes EDH packet generation, line number insertion, and CRC calculation - all controllable per-application requirements.

What is the purpose of the RSET pin on the GS1531-CBE2?

The RSET pin on the GS1531-CBE2 is an analog input that sets the amplitude of the serial digital output (SDO/SDO). Connecting a 281 Ω ±1% resistor between RSET and CD_VDD configures the cable driver for 800 mV_p-p single-ended output into a 75 Ω load - meeting SMPTE 292M/259M-C amplitude specifications. Adjusting RSET allows fine-tuning for different cable lengths and termination conditions.

Does the GS1531-CBE2 require an external VCO, and if so, which one is recommended?

Yes, the GS1531-CBE2 requires an external VCO for its PLL, with Gennum recommending the GO1555 (for new designs) or GO1525. The GO1555 connects directly to GS1531-CBE2 pins VCO_VCC, VCO_GND, and differential VCO inputs, providing the 1.485 GHz reference needed for HD-SDI operation. The GS1531-CBE2 supplies bias and ground to the VCO, eliminating need for external regulators or isolation components.

GS1531-CBE2 Specifications

Product attributes: Attribute value

Manufacturer:: Semtech Corporation

Series:: HD-LINX® II

Package/Case:: 100-BGA

Packaging:: Tray

Product Status:: Obsolete

Function:: Serializer

Applications:: Professional Video

Standards:: SMPTE

Control Interface:: Serial

Voltage - Supply:: 3.135V ~ 3.465V

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 100-BGA (11x11)

GS1531-CBE2 FAQ

1.How can I place an order for GS1531-CBE2 through Aetrix?

Please submit a Request for Quotation (RFQ) for GS1531-CBE2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for GS1531-CBE2 reliable?

The price and inventory of GS1531-CBE2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GS1531-CBE2 is usually 5 days.

3.What payment methods are accepted for GS1531-CBE2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GS1531-CBE2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for GS1531-CBE2?

GS1531-CBE2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your GS1531-CBE2 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for GS1531-CBE2?

For technical support, including GS1531-CBE2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GS1531-CBE2 requirements.

6.How does Aetrix verify that GS1531-CBE2 is sourced from the original manufacturer or authorized distributors?

All GS1531-CBE2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that GS1531-CBE2 meets industry standards.

7.What is the process for return or replacement of GS1531-CBE2?

All GS1531-CBE2 units undergo pre-shipment inspection (PSI). If there is an issue with GS1531-CBE2, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The GS1531-CBE2 part is unused and in its original packaging.

Return procedure for GS1531-CBE2:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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