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

Semtech Corporation GS9068-CKAE3

Name: GS9068-CKAE3
Brand: Semtech Corporation
SKU: GS9068-CKAE3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: GS9068-CKAE3

Manufacturer:: Semtech Corporation

Category:: Video Processing

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: GS9068-CKAE3.pdf

Description:: IC VIDEO CABLE DRIVER 8SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

GS9068-CKAE3 from Gennum is a dual-output SD-SDI cable driver IC compliant with SMPTE 259M and SMPTE 344M standards, delivering 800 mV_p-p single-ended output into 75 Ω coaxial loads at up to 540 Mb/s data rate, operating from a single 3.3 V supply with 160 mW typical power consumption in 8-pin SOIC packaging for broadcast video signal distribution.

For engineers reviewing the GS9068-CKAE3 datasheet, pinout, applications, or equivalent options, this device serves as a high-speed differential serial digital interface driver requiring precise amplitude control via RSET, low-jitter output (≤30 ps additive jitter), and verified return loss ≥15 dB across 5–540 MHz for SMPTE-compliant coaxial transmission.

Technical Context

The GS9068-CKAE3 implements a current-mode output stage with external RSET-controlled amplitude adjustment and internal biasing for AC-coupled LVPECL differential input. Its dual SDO/SDO outputs drive 75 Ω coaxial cables without external termination resistors at the driver side.

It features self-biased differential inputs accepting 300–2200 mV_p-p swing, output rise/fall times of 400–800 ps (20%–80%), and logic-state-dependent output capacitance requiring interpolated return loss measurement between V_CC and V_CC−1.6 V to meet SMPTE 259M return loss ≥15 dB specification.

Key Specifications

Parameter	Value and Actual Design Meaning
Data Rate	Up to 540 Mb/s - supports standard-definition serial digital video transport per SMPTE 259M.
Output Swing	800 mV_p-p (RSET = 750 Ω) - meets SMPTE 259M output amplitude requirement into 75 Ω load.
Additive Jitter	≤30 ps - ensures signal integrity over long coaxial runs in broadcast infrastructure.
Return Loss	≥15 dB (5–540 MHz) - satisfies SMPTE 259M source impedance and reflection compliance.
Supply Voltage	3.1–3.5 V - single 3.3 V rail operation with ±0.2 V tolerance for stable biasing.
Power Consumption	160 mW typical - enables thermal management in dense video routing cards.
Operating Temp	0°C to 70°C - rated for commercial broadcast equipment environments.

Pinout & Package

GS9068-CKAE3 is housed in an 8-pin SOIC package (JEDEC MS-012) with 1.27 mm pitch, 5.0 mm × 6.2 mm body size, and exposed pad not present. Pin 1 is marked by notch or dot; pins are arranged counterclockwise from top-left when viewed from top.

Pin/Terminal	Circuit Role	Design Meaning
1, 2 (SDI, SDI)	Differential Input	LVPECL-compatible high-impedance inputs accepting AC-coupled serial digital video; no external biasing required.
3 (VEE)	Ground Reference	Most negative supply node - must be connected directly to system ground plane for signal integrity.
4 (RSET)	Amplitude Control	External resistor sets output voltage swing; 750 Ω yields nominal 800 mV_p-p; PCB ground removal under this node minimizes parasitic capacitance.
5 (VCC)	Positive Supply	+3.3 V DC power input; decoupling capacitor required near pin for high-frequency stability.
6 (NC)	No Connect	Internally unconnected; must remain floating - no trace or component attached.
7, 8 (SDO, SDO)	Differential Output	Current-mode outputs driving 75 Ω coaxial cables; require external AC-coupling capacitor (4.7 μF) and series inductor (5.6 nH typical) per SMPTE-compliant layout.

Key Features

Feature	Design Value
SMPTE 259M/344M Compliance	Fully validated against return loss, amplitude, jitter, and timing specs - eliminates need for post-layout rework in broadcast gear.
Dual Coaxial Outputs	Independent SDO/SDO channels enable redundant or split-path SDI distribution without external splitters or buffers.
Self-Biased Differential Input	Eliminates external bias resistors and simplifies AC-coupling design - reduces BOM count and layout complexity.
RSET-Controlled Amplitude	Adjustable 608–1040 mV_p-p output swing via single resistor - supports system-level gain calibration and cable loss compensation.
8-Pin SOIC Packaging	Standard footprint compatible with automated assembly and legacy HD-LINX® II layouts - enables drop-in replacement in existing designs.

Applications

Broadcast Video Routing	SDI Distribution Amplifier
Use Scenario: Signal splitting and fan-out in broadcast switchers where one SDI source feeds multiple monitors or recorders. IC Role / Device Role / Timing Role: Dual-output cable driver providing matched-amplitude, low-jitter copies of incoming SDI stream. Use Value: Maintains SMPTE 259M eye diagram integrity across both outputs with ≤30 ps additive jitter and ≥15 dB return loss.	Use Scenario: Re-transmission of SDI signals over extended coaxial runs (>100 m) in studio infrastructure. IC Role / Device Role / Timing Role: Active repeater stage restoring signal amplitude and edge fidelity before cable attenuation degrades eye opening. Use Value: Delivers 800 mV_p-p into 75 Ω with controlled rise/fall (400–800 ps) to sustain bit error rate <10⁻¹² at 540 Mb/s.
Camera-to-Processor Interface	OEM Broadcast Equipment
Use Scenario: Direct connection from professional camera head to base station processing board via coaxial cable. IC Role / Device Role / Timing Role: Final-stage driver conditioning SDI output prior to connector launch onto 75 Ω coax. Use Value: Ensures output source impedance matches cable Z₀, minimizing reflections that cause intersymbol interference.	Use Scenario: Integration into OEM-designed video production hardware requiring RoHS-compliant, temperature-stable drivers. IC Role / Device Role / Timing Role: Pb-free, green-compliant SDI driver qualified for 0°C–70°C operation in field-deployable encoders and converters. Use Value: Meets industrial lifecycle requirements with documented 160 mW power budget and 300 mW absolute max dissipation margin.

Broadcast Video Routing

SDI Distribution Amplifier

Use Scenario: Signal splitting and fan-out in broadcast switchers where one SDI source feeds multiple monitors or recorders.

IC Role / Device Role / Timing Role: Dual-output cable driver providing matched-amplitude, low-jitter copies of incoming SDI stream.

Use Value: Maintains SMPTE 259M eye diagram integrity across both outputs with ≤30 ps additive jitter and ≥15 dB return loss.

Use Scenario: Re-transmission of SDI signals over extended coaxial runs (>100 m) in studio infrastructure.

IC Role / Device Role / Timing Role: Active repeater stage restoring signal amplitude and edge fidelity before cable attenuation degrades eye opening.

Use Value: Delivers 800 mV_p-p into 75 Ω with controlled rise/fall (400–800 ps) to sustain bit error rate <10⁻¹² at 540 Mb/s.

Camera-to-Processor Interface

OEM Broadcast Equipment

Use Scenario: Direct connection from professional camera head to base station processing board via coaxial cable.

IC Role / Device Role / Timing Role: Final-stage driver conditioning SDI output prior to connector launch onto 75 Ω coax.

Use Value: Ensures output source impedance matches cable Z₀, minimizing reflections that cause intersymbol interference.

Use Scenario: Integration into OEM-designed video production hardware requiring RoHS-compliant, temperature-stable drivers.

IC Role / Device Role / Timing Role: Pb-free, green-compliant SDI driver qualified for 0°C–70°C operation in field-deployable encoders and converters.

Use Value: Meets industrial lifecycle requirements with documented 160 mW power budget and 300 mW absolute max dissipation margin.

Equivalent & Alternatives

The following parts are listed as comparable options for similar SD-SDI cable driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
GS1528-CKAE3	Pin-compatible HD-LINX® II multirate driver supporting up to 1.485 Gb/s (HD-SDI); higher power (220 mW), different RSET scaling.	Required for HD-SDI or dual-rate (SD/HD) systems; not suitable for SD-only cost-sensitive designs.	Select GS1528-CKAE3 only if HD-SDI support or multirate flexibility is needed; GS9068-CKAE3 remains optimal for pure SD-SDI.
LMH0303SQ/NOPB	Single-output SDI driver with integrated reclocker; requires separate clock recovery; 3.3 V supply; 16-pin WQFN.	Used where jitter cleanup is mandatory; adds complexity and board area versus GS9068-CKAE3's direct-drive simplicity.	Choose LMH0303SQ/NOPB when input jitter exceeds GS9068-CKAE3's tolerance; otherwise, GS9068-CKAE3 offers lower cost and smaller footprint.

Compared with GS1528-CKAE3 and LMH0303SQ/NOPB, the GS9068-CKAE3 delivers optimized SD-SDI performance with minimal external components, lower power, and proven interoperability in SMPTE 259M infrastructure - making it the preferred choice for dedicated SD video routing where HD capability or reclocking is unnecessary.

Availability

GS9068-CKAE3 is available at Aetrix Electronics and suitable for broadcast video routing, SDI distribution amplifiers, camera-to-processor interfaces, and OEM broadcast equipment requiring stable component supply across production lifecycles.

Supply support for GS9068-CKAE3 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 Canadian semiconductor company specializing in high-speed serial interface ICs for broadcast video, acquired by Semtech in 2013. It developed industry-standard SDI/HD-SDI physical layer solutions.

The GS9068-CKAE3 belongs to Gennum's SD-SDI cable driver product line, engineered specifically for robust, low-jitter transmission of standard-definition serial digital video over coaxial infrastructure in professional broadcast environments.

FAQ

What is the maximum data rate supported by the GS9068-CKAE3?

The GS9068-CKAE3 supports a maximum data rate of 540 Mb/s, fully compliant with SMPTE 259M for standard-definition serial digital interface applications. This rating is confirmed in Table 2-3 of the official datasheet under "Serial input data rate" with no derating required at 0°C–70°C ambient. The GS9068-CKAE3 is not rated for HD-SDI (1.485 Gb/s) operation.

Does the GS9068-CKAE3 require external biasing resistors on its differential inputs?

No, the GS9068-CKAE3 does not require external biasing resistors on its SDI/SDI inputs. As stated in Section 3.1 of the datasheet, the inputs are self-biased, enabling straightforward AC-coupling with a minimum 4.7 pF capacitor. This eliminates the need for precision bias networks and simplifies PCB layout for the GS9068-CKAE3.

How is output amplitude adjusted on the GS9068-CKAE3?

Output amplitude on the GS9068-CKAE3 is adjusted using an external resistor connected to the RSET pin. Per Table 3-1, a 750 Ω resistor yields 800 mV_p-p output swing into 75 Ω; values from 573 Ω to 995 Ω provide 1040 mV_p-p down to 608 mV_p-p. The resistor must be placed adjacent to the RSET pin with ground plane removed beneath it to maintain accuracy for the GS9068-CKAE3.

What is the recommended PCB layout practice for the GS9068-CKAE3 RSET node?

The GS9068-CKAE3 RSET node requires minimized parasitic capacitance: the PCB ground plane must be removed beneath both the RSET pin and the external resistor, and the resistor should be a ±1% SMT type placed as close as possible to the pin. This practice is explicitly called out in Section 3.4 and Figure 3-2 to ensure accurate amplitude control for the GS9068-CKAE3.

Is the GS9068-CKAE3 pin-compatible with any other Gennum drivers?

Yes, the GS9068-CKAE3 is pin-compatible with the GS1528-CKAE3 HD-LINX® II dual slew-rate cable driver, as confirmed in the "Key Features" section of the datasheet. This allows migration from SD to HD-SDI within the same PCB footprint, though GS1528-CKAE3 operates at higher power and supports 1.485 Gb/s - the GS9068-CKAE3 remains functionally distinct for SD-only use cases.

GS9068-CKAE3 Specifications

Product attributes: Attribute value

Manufacturer:: Semtech Corporation

Series:: HD-LINX® II

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Function:: Driver

Applications:: Professional Video

Standards:: SMPTE

Control Interface:: Serial

Voltage - Supply:: 3.1V ~ 3.5V

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 8-SOIC

GS9068-CKAE3 FAQ

1.How can I place an order for GS9068-CKAE3 through Aetrix?

Please submit a Request for Quotation (RFQ) for GS9068-CKAE3 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 GS9068-CKAE3 reliable?

The price and inventory of GS9068-CKAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GS9068-CKAE3 is usually 5 days.

3.What payment methods are accepted for GS9068-CKAE3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GS9068-CKAE3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for GS9068-CKAE3?

GS9068-CKAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your GS9068-CKAE3 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 GS9068-CKAE3?

For technical support, including GS9068-CKAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GS9068-CKAE3 requirements.

6.How does Aetrix verify that GS9068-CKAE3 is sourced from the original manufacturer or authorized distributors?

All GS9068-CKAE3 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 GS9068-CKAE3 meets industry standards.

7.What is the process for return or replacement of GS9068-CKAE3?

All GS9068-CKAE3 units undergo pre-shipment inspection (PSI). If there is an issue with GS9068-CKAE3, 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 GS9068-CKAE3 part is unused and in its original packaging.

Return procedure for GS9068-CKAE3:

1.Submit a request within 90 days.

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

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