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

Semtech Corporation GS4982-CKAE3

Name: GS4982-CKAE3
Brand: Semtech Corporation
SKU: GS4982-CKAE3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: GS4982-CKAE3

Manufacturer:: Semtech Corporation

Category:: Video Processing

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

Datasheet:: GS4982-CKAE3.pdf

Description:: IC VIDEO SYNC SEPARATOR 8SOIC

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Product details

Overview

GS4982-CKAE3 from Gennum is a precision video sync separator IC designed to extract horizontal, vertical, back porch, and odd/even field timing signals from NTSC, PAL, and SECAM composite video inputs. It delivers ±5ns temperature stability over 0°C–70°C, supports 0.5V–4.0V_pp input amplitude with +5V supply, provides horizontal sync output (Pin 1), and features internal color burst filtering (>15dB attenuation at 3.58MHz) for broadcast-grade timing integrity in legacy video processing systems.

For engineers reviewing the GS4982-CKAE3 datasheet, pinout, applications, or equivalent options, this device is selected for analog video timing recovery where jitter immunity, robust signal detection, and precise 50% sync slicing are required - especially in professional video equipment, broadcast monitors, and legacy AV infrastructure requiring horizontal sync derivation.

Technical Context

The GS4982-CKAE3 implements a dual-mode input clamp (Hard/Soft) to maintain 50% sync slicing accuracy within ±5%, using a 1.55V sync tip clamp voltage and integrated back porch hold circuitry. Its internal frequency-to-voltage converter validates input scan rate (15.7 ±4kHz typical) to enable automatic output muting during signal loss.

Timing outputs are derived via dedicated detector blocks: horizontal sync (420ns delay, 8.0μs width), vertical sync (197.7μs fixed-width pulse), back porch (525ns delay from sync rising edge, 2.5μs width), and odd/even field (clocked by vertical sync falling edge). All logic outputs drive 40μA at VOH ≥4.2V and sink 1.6mA at VOL ≤0.6V.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	+4.5V to +13.2V - enables direct integration into legacy 5V or 12V video system rails without LDO overhead.
Input Signal Range	0.5V to 4.0V_pp - accommodates standard composite video swing across broadcast, consumer, and industrial sources.
Horizontal Sync Delay	340–510ns - tightly bounded propagation ensures deterministic timing alignment with downstream video processors.
Temperature Stability	±5ns over 0°C–70°C - guarantees sub-pixel timing consistency in uncontrolled thermal environments.
Color Burst Attenuation	≥12dB at 3.58MHz - suppresses chroma interference to prevent false sync edge detection in NTSC applications.
Output Mute Probation	1.2–5ms - provides configurable fault response window before disabling outputs during signal dropout.
Supply Current	6–10mA at +5V - ultra-low power operation suitable for multi-channel video timing boards.

Pinout & Package

GS4982-CKAE3 is housed in an 8-pin SOIC package (JEDEC MS-012AC, 3.9mm width, 1.27mm pitch), RoHS-compliant and green-qualified per ordering code E3.

Pin/Terminal	Circuit Role	Design Meaning
1	Horizontal Sync Output	Active-high TTL-compatible pulse (6–10μs width) synchronized to horizontal blanking interval.
2	Composite Video Input	AC-coupled input accepting 0.5–4.0V_pp; internally clamped to 1.55V sync tip reference.
3	Vertical Sync Output	Fixed-width 197.7μs pulse marking vertical interval start/end; immune to serration noise.
4	Ground	Dedicated analog ground return for video path and sync detection circuitry.
5	Back Porch Output	Negative-going pulse delayed 400–650ns from sync rising edge; gated by internal BPEN signal.
6	RSET	External resistor (227kΩ for NTSC) setting all internal timing currents and jitter performance.
7	Odd/Even Output	Logic-high = odd field, logic-low = even field; determined by vertical/horizontal phase comparison.
8	Vcc	Primary power rail (+4.5V to +13.2V); powers analog front-end, comparators, and digital output drivers.

Key Features

Feature	Design Value
Precision 50% sync slicing	Eliminates time-base errors caused by sync pulse amplitude variation - critical for stable line-locking in CRT and SDI timing circuits.
Internal color burst filter	Reduces external component count by >15dB suppression at 3.58MHz, preventing chroma-induced false triggering.
Dual-mode input clamp	Soft clamp maintains ±5% slicing level accuracy in steady state; hard clamp + Nosync Recovery Current enables <120ns impulse recovery.
Signal detect & mute logic	Automatically mutes all outputs to logic high after 2.5ms probation if horizontal frequency deviates beyond 15.7±4kHz.
Robust noise immunity	Back porch, odd/even, and horizontal outputs retain integrity under impulse noise - validated via integrated windowing circuitry.

Applications

Broadcast Monitor Timing Recovery	Legacy CCTV System Sync Extraction
Use Scenario: Extracting horizontal and vertical sync from analog composite feeds in professional broadcast monitoring equipment. IC Role / Device Role / Timing Role: Primary sync separator generating HSYNC, VSYNC, and back porch signals for raster-synchronized display control and genlock. Use Value: ±5ns temperature stability and 50% slicing ensure pixel-accurate timing alignment across multiple monitors without manual calibration.	Use Scenario: Deriving field-accurate timing from aging CCTV camera outputs feeding digitization and motion detection hardware. IC Role / Device Role / Timing Role: Field synchronization source providing odd/even and vertical sync to frame-grabber ASICs and motion analysis engines. Use Value: Internal frequency-to-voltage validation prevents false triggers during cable-induced signal degradation or intermittent feed loss.
NTSC Video Processing Board	Video Test Equipment Calibration
Use Scenario: Integrating into FPGA-based NTSC decoder boards requiring precise horizontal sync for pixel clock generation and line counting. IC Role / Device Role / Timing Role: Horizontal sync generator with 420ns typical delay and 8.0μs pulse width - directly compatible with Xilinx Spartan-6 timing constraints. Use Value: RSET-controlled current sources allow fine-tuning of horizontal delay to match board-level trace skew without redesign.	Use Scenario: Calibrating waveform monitors and vectorscopes that require reference sync signals traceable to composite input. IC Role / Device Role / Timing Role: Precision timing reference generator delivering jitter-immune HSYNC, VSYNC, and back porch for instrument synchronization. Use Value: Dual-mode clamp and internal burst filter eliminate need for external sync conditioning circuits, reducing test setup complexity.

Broadcast Monitor Timing Recovery

Legacy CCTV System Sync Extraction

Use Scenario: Extracting horizontal and vertical sync from analog composite feeds in professional broadcast monitoring equipment.

IC Role / Device Role / Timing Role: Primary sync separator generating HSYNC, VSYNC, and back porch signals for raster-synchronized display control and genlock.

Use Value: ±5ns temperature stability and 50% slicing ensure pixel-accurate timing alignment across multiple monitors without manual calibration.

Use Scenario: Deriving field-accurate timing from aging CCTV camera outputs feeding digitization and motion detection hardware.

IC Role / Device Role / Timing Role: Field synchronization source providing odd/even and vertical sync to frame-grabber ASICs and motion analysis engines.

Use Value: Internal frequency-to-voltage validation prevents false triggers during cable-induced signal degradation or intermittent feed loss.

NTSC Video Processing Board

Video Test Equipment Calibration

Use Scenario: Integrating into FPGA-based NTSC decoder boards requiring precise horizontal sync for pixel clock generation and line counting.

IC Role / Device Role / Timing Role: Horizontal sync generator with 420ns typical delay and 8.0μs pulse width - directly compatible with Xilinx Spartan-6 timing constraints.

Use Value: RSET-controlled current sources allow fine-tuning of horizontal delay to match board-level trace skew without redesign.

Use Scenario: Calibrating waveform monitors and vectorscopes that require reference sync signals traceable to composite input.

IC Role / Device Role / Timing Role: Precision timing reference generator delivering jitter-immune HSYNC, VSYNC, and back porch for instrument synchronization.

Use Value: Dual-mode clamp and internal burst filter eliminate need for external sync conditioning circuits, reducing test setup complexity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar video sync separation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
GS4982-CKA	Same die, non-Pb-free SOIC packaging; lacks RoHS-compliant finish and green material certification.	Acceptable for non-regulated industrial prototypes but not for EU/China export or medical CE-marked systems.	Select GS4982-CKAE3 when compliance with RoHS Directive 2011/65/EU and IEC 61249-2-21 is mandatory.
GS4882-CKAE3	Omits horizontal sync output (Pin 1 = composite sync instead); identical pinout, RSET, and timing specs otherwise.	Suitable only where composite sync suffices - not usable in HSYNC-dependent designs like line-locked ADC sampling or HD-SDI embedders.	Choose GS4982-CKAE3 exclusively when horizontal sync extraction is required; GS4882-CKAE3 is not a functional substitute.

Compared with GS4982-CKA, GS4982-CKAE3 adds Pb-free/green compliance without altering electrical behavior; compared with GS4882-CKAE3, it replaces composite sync with horizontal sync on Pin 1 - a functionally distinct output essential for horizontal-phase-sensitive systems.

Availability

GS4982-CKAE3 is available at Aetrix Electronics and suitable for broadcast monitor timing recovery, legacy CCTV system sync extraction, NTSC video processing boards, video test equipment calibration, and analog video infrastructure upgrades requiring stable component supply and long-term lifecycle support.

Supply support for GS4982-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-performance analog and mixed-signal ICs for video, communications, and timing applications before its acquisition by Semtech in 2013.

The GS4982 belongs to Gennum's video sync separator product line, engineered specifically for broadcast-grade analog video timing recovery in NTSC/PAL/SECAM systems where jitter, noise immunity, and thermal stability are critical.

FAQ

What is the primary function of the GS4982-CKAE3 in a video system?

The GS4982-CKAE3 extracts horizontal sync, vertical sync, back porch, and odd/even field timing signals from composite video inputs. Unlike the GS4882-CKAE3, it outputs horizontal sync on Pin 1 instead of composite sync - making it essential for line-locked sampling, genlock, and horizontal-phase-dependent video processing. Its 50% slicing architecture ensures timing accuracy independent of input amplitude variation.

Does the GS4982-CKAE3 require external components to operate?

Yes - the GS4982-CKAE3 requires an external RSET resistor (227kΩ for NTSC) on Pin 6 to set internal timing currents, and AC-coupling capacitors on the video input (Pin 2). No external sync filters or clamping diodes are needed due to its integrated color burst filter and dual-mode input clamp, which reduce bill-of-materials count while maintaining ±5ns temperature stability.

How does the GS4982-CKAE3 handle missing or corrupted video signals?

The GS4982-CKAE3 uses an internal frequency-to-voltage converter to monitor horizontal scan rate. If the input deviates beyond 15.7 ±4kHz, a probation timer starts (1.2–5ms). If valid video isn't restored before expiration, all outputs mute to logic high. Upon reacquisition, the device requires eight consecutive valid lines before re-enabling outputs - ensuring clean restart without glitch propagation.

What is the significance of the "E3" suffix in GS4982-CKAE3?

The "E3" suffix in GS4982-CKAE3 denotes full RoHS compliance and green material qualification - including lead-free terminations, halogen-free molding compound, and adherence to JEDEC J-STD-609A Class 3 moisture sensitivity. This distinguishes it from the non-E3 GS4982-CKA variant and ensures suitability for export-controlled and environmentally regulated applications.

Can the GS4982-CKAE3 be used with PAL or SECAM video standards?

Yes - the GS4982-CKAE3 supports NTSC, PAL, and SECAM composite video standards. Its internal timing detectors and windowing circuitry adapt to differing horizontal frequencies (e.g., 15.625kHz for PAL), and the 50% sync slicing architecture remains effective across varying sync pulse amplitudes and durations. RSET value remains 227kΩ for all three standards per Gennum documentation.

GS4982-CKAE3 Specifications

Product attributes: Attribute value

Manufacturer:: Semtech Corporation

Series:: -

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

Packaging:: Tube

Product Status:: Obsolete

Function:: Separator

Applications:: Professional Video

Standards:: NTSC, PAL, SECAM

Control Interface:: Serial

Voltage - Supply:: 4.5V ~ 13.2V

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 8-SOIC

GS4982-CKAE3 FAQ

1.How can I place an order for GS4982-CKAE3 through Aetrix?

Please submit a Request for Quotation (RFQ) for GS4982-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 GS4982-CKAE3 reliable?

The price and inventory of GS4982-CKAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GS4982-CKAE3 is usually 5 days.

3.What payment methods are accepted for GS4982-CKAE3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GS4982-CKAE3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for GS4982-CKAE3?

GS4982-CKAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your GS4982-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 GS4982-CKAE3?

For technical support, including GS4982-CKAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GS4982-CKAE3 requirements.

6.How does Aetrix verify that GS4982-CKAE3 is sourced from the original manufacturer or authorized distributors?

All GS4982-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 GS4982-CKAE3 meets industry standards.

7.What is the process for return or replacement of GS4982-CKAE3?

All GS4982-CKAE3 units undergo pre-shipment inspection (PSI). If there is an issue with GS4982-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 GS4982-CKAE3 part is unused and in its original packaging.

Return procedure for GS4982-CKAE3:

1.Submit a request within 90 days.

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

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