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

Semtech Corporation GS4882-CTAE3

Name: GS4882-CTAE3
Brand: Semtech Corporation
SKU: GS4882-CTAE3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: GS4882-CTAE3

Manufacturer:: Semtech Corporation

Category:: Video Processing

Package:: -

Datasheet:: GS4882-CTAE3.pdf

Description:: IC VIDEO SYNC SEPARATOR 8SOIC

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Product details

Overview

GS4882-CTAE3 from Gennum is a precision video sync separator IC for NTSC/PAL/SECAM composite video systems, delivering noise-immune composite sync, vertical sync, back porch, and odd/even field outputs with ±5ns temperature stability over 0°C to 70°C, 50% sync slicing accuracy (45–55%), and operation from 0.5V to 4.0Vpp input signals at +5V supply.

For engineers reviewing the GS4882-CTAE3 datasheet, pinout, applications, or equivalent options, this device supports legacy broadcast video timing recovery in analog video processing, CCTV front-end synchronization, and broadcast equipment where stable, amplitude-invariant sync extraction is critical under varying signal conditions and thermal environments.

Technical Context

The GS4882-CTAE3 implements a dual-mode (Hard/Soft) input clamp that maintains 50% sync slicing level accuracy within ±5% by clamping the sync tip to 1.55V and deriving the back porch voltage via integrated-and-hold circuitry gated by its own back porch output. Its internal color burst filter provides ≥12dB attenuation at 3.58MHz to suppress spurious timing artifacts.

A frequency-to-voltage converter monitors horizontal scan rate (15.7 ± 4kHz typical) to enable robust signal detection and automatic output muting during loss-of-video; outputs remain muted until 8 valid lines are received post-recovery. The RSET pin (Pin 6) sets all internal timing currents, with 227kΩ specified for NTSC compliance and optimized jitter performance.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5V to 13.2V - supports wide-range analog video system power rails including +5V standard operation.
Input Signal Range	0.5V to 4.0Vpp - accommodates degraded or overdriven composite video without external scaling.
Sync Slice Accuracy	45%–55% (typ. 50%) - ensures timing stability across sync pulse amplitude variations, eliminating time-base errors.
Temp Stability (Composite Sync Delay)	±5ns (0°C to 70°C) - guarantees sub-pixel timing consistency in commercial-grade video equipment.
Back Porch Pulse Width	2.0–3.2μs (typ. 2.5μs) - matches NTSC back porch duration for reliable downstream clamping and DC restoration.
Vertical Sync Pulse Width	197.7μs - precisely replicates NTSC vertical interval duration for frame-synchronized processing.
Supply Current (VCC = 5V)	6mA typ., 10mA max - enables low-power analog video subsystem design with minimal thermal impact.

Pinout & Package

GS4882-CTAE3 is housed in an 8-pin SOIC package (3.9mm × 4.9mm, 1.27mm pitch), RoHS-compliant and green-certified, suitable for surface-mount reflow assembly in broadcast and surveillance PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1	Composite Sync Output	Active-low TTL-compatible sync pulse (delay: 150–250ns); primary timing reference for sync-dependent circuits.
2	Composite Video Input	AC-coupled input accepting 0.5–4.0Vpp signals; feeds dual-mode clamp and color burst filter.
3	Vertical Sync Output	Fixed-width 197.7μs pulse marking vertical blanking interval; used for frame synchronization and field-rate control.
4	Ground	Analog/digital common reference; requires low-impedance connection to minimize noise coupling into sync paths.
5	Back Porch Output	Negative-going pulse delayed 400–650ns from sync rising edge; enables precise DC restore timing in analog video chains.
6	RSET	External resistor (227kΩ for NTSC) setting internal timing currents; determines jitter performance and sync accuracy.
7	Odd/Even Output	Logic-high = odd field, logic-low = even field; derived from vertical/horizontal phase comparison for interlace handling.
8	VCC	+4.5V to +13.2V supply input; decoupling capacitor (0.1μF) required adjacent to pin for noise immunity.

Key Features

Feature	Design Value
Precision 50% sync slicing	Eliminates time-base errors caused by sync amplitude variation, ensuring consistent horizontal timing across signal degradation.
Internal color burst filter	≥12dB attenuation at 3.58MHz reduces chroma interference in sync extraction, lowering external component count and board space.
Dual-mode input clamp	Soft clamp maintains ±5% 50% slicing level accuracy in steady state; hard clamp + Nosync Recovery Current (23–40μA) enables <120ns impulse recovery.
Signal detect & output mute	Automatically mutes all outputs to logic high after 1.2–5ms probation on invalid input (e.g., cable disconnect), preventing downstream latch-up or false triggering.
Temperature-stable delay	Composite sync delay drift limited to ±5ns over 0°C to 70°C, enabling reliable timing in uncontrolled ambient environments.

Applications

NTSC Broadcast Equipment	CCTV Analog Front-End
Use Scenario: Legacy NTSC broadcast encoders and modulators requiring stable composite sync for genlock and timing alignment. IC Role / Device Role / Timing Role: Primary sync separator generating composite sync, vertical sync, and back porch signals directly from baseband composite video. Use Value: Enables amplitude-invariant sync recovery despite transmission line loss or source-level signal variation, preserving frame/line lock integrity.	Use Scenario: Analog CCTV camera modules and DVR input stages needing field-accurate timing for motion detection and frame capture. IC Role / Device Role / Timing Role: Provides odd/even field identification and vertical sync for interlaced video processing and deinterlacing control. Use Value: Robust odd/even decisioning immune to pre-equalizing pulse noise ensures correct field ordering even under EMI-heavy surveillance environments.
Video Test & Measurement	Legacy Video Processing Boards
Use Scenario: Oscilloscope-based video waveform analyzers and sync generators verifying NTSC/PAL signal integrity. IC Role / Device Role / Timing Role: Reference sync generator with calibrated back porch and vertical outputs for instrument calibration and trigger reference. Use Value: ±5ns temperature stability and 2.5μs back porch pulse width allow traceable, repeatable timing measurements across lab temperature fluctuations.	Use Scenario: Industrial video digitizers and frame grabbers converting analog video to digital domain using legacy designs. IC Role / Device Role / Timing Role: Timing engine supplying composite sync and vertical sync to ADC sampling clocks and memory controllers. Use Value: Integrated signal detection and auto-mute prevent corrupted frame captures during transient video loss, improving data reliability.

NTSC Broadcast Equipment

CCTV Analog Front-End

Use Scenario: Legacy NTSC broadcast encoders and modulators requiring stable composite sync for genlock and timing alignment.

IC Role / Device Role / Timing Role: Primary sync separator generating composite sync, vertical sync, and back porch signals directly from baseband composite video.

Use Value: Enables amplitude-invariant sync recovery despite transmission line loss or source-level signal variation, preserving frame/line lock integrity.

Use Scenario: Analog CCTV camera modules and DVR input stages needing field-accurate timing for motion detection and frame capture.

IC Role / Device Role / Timing Role: Provides odd/even field identification and vertical sync for interlaced video processing and deinterlacing control.

Use Value: Robust odd/even decisioning immune to pre-equalizing pulse noise ensures correct field ordering even under EMI-heavy surveillance environments.

Video Test & Measurement

Legacy Video Processing Boards

Use Scenario: Oscilloscope-based video waveform analyzers and sync generators verifying NTSC/PAL signal integrity.

IC Role / Device Role / Timing Role: Reference sync generator with calibrated back porch and vertical outputs for instrument calibration and trigger reference.

Use Value: ±5ns temperature stability and 2.5μs back porch pulse width allow traceable, repeatable timing measurements across lab temperature fluctuations.

Use Scenario: Industrial video digitizers and frame grabbers converting analog video to digital domain using legacy designs.

IC Role / Device Role / Timing Role: Timing engine supplying composite sync and vertical sync to ADC sampling clocks and memory controllers.

Use Value: Integrated signal detection and auto-mute prevent corrupted frame captures during transient video loss, improving data reliability.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
GS4882-CKAE3	Same die, identical electrical specs, but supplied in SOIC tube (not tape-and-reel); no functional difference from GS4882-CTAE3.	Preferred for low-volume prototyping or manual assembly; GS4882-CTAE3 is optimized for automated SMT production.	Select GS4882-CTAE3 for volume manufacturing with pick-and-place; choose GS4882-CKAE3 only if tube packaging is required.
EL4583CNZ	Single-supply (±5V), no internal color burst filter, wider temp range (−40°C to +85°C), but lacks odd/even output and back porch enable logic.	Suitable for general-purpose sync extraction where field identification and NTSC-specific back porch timing are not needed.	Use EL4583CNZ only when extended temperature operation is mandatory and GS4882-CTAE3's advanced features (e.g., BPEN, integrated hold) are unnecessary.

Compared with GS4882-CKAE3, GS4882-CTAE3 offers identical performance with tape-and-reel packaging for SMT efficiency; versus EL4583CNZ, GS4882-CTAE3 delivers superior NTSC-specific functionality-including back porch gating, odd/even field detection, and color burst filtering-at the cost of narrower temperature range and single-supply operation.

Availability

GS4882-CTAE3 is available at Aetrix Electronics and suitable for NTSC broadcast equipment, analog CCTV front-ends, and legacy video processing boards requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for GS4882-CTAE3 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 GS4882 product line was designed specifically for precision analog video timing recovery in broadcast, surveillance, and test equipment, emphasizing amplitude-invariant sync extraction and noise resilience in real-world NTSC/PAL signal environments.

FAQ

What is the function of Pin 6 (RSET) on the GS4882-CTAE3?

Pin 6 (RSET) on the GS4882-CTAE3 sets all internal timing currents via an external resistor; for NTSC applications, a 227kΩ resistor is required to achieve specified jitter performance, sync accuracy, and delay stability. This value differs from earlier Gennum sync separators (e.g., GS4881), and deviation causes measurable timing drift and reduced noise immunity in the GS4882-CTAE3.

Does the GS4882-CTAE3 support PAL and SECAM video standards?

Yes, the GS4882-CTAE3 explicitly supports NTSC, PAL, and SECAM composite video standards per its datasheet description and circuit architecture. Its internal integrator-based vertical detector, frequency-to-voltage signal validation, and 50% slicing logic operate correctly across all three standards' timing structures, though RSET = 227kΩ is optimized for NTSC horizontal frequency (15.7kHz).

How does the GS4882-CTAE3 handle loss of input video signal?

The GS4882-CTAE3 uses an internal frequency-to-voltage converter to monitor horizontal scan rate; if the input deviates beyond 15.7 ± 4kHz or disappears, a probation timer (1.2–5ms) activates. If no valid signal returns before expiry, all outputs mute to logic high. Recovery requires 8 consecutive valid video lines before outputs re-enable - a behavior confirmed in Section 2.7 of the GS4882-CTAE3 datasheet.

What is the purpose of the internal color burst filter in the GS4882-CTAE3?

The internal color burst filter in the GS4882-CTAE3 attenuates the 3.58MHz chroma subcarrier by ≥12dB (typ. 15dB) to prevent color burst energy from corrupting sync pulse detection. This eliminates need for external notch filters, reduces component count, and improves sync extraction reliability in noisy or poorly filtered composite video sources - a key differentiator from basic comparator-based sync separators.

Can the GS4882-CTAE3 be used in place of the GS4982?

No - the GS4882-CTAE3 and GS4982 are functionally distinct: GS4882-CTAE3 outputs composite sync on Pin 1, while GS4982 outputs horizontal sync on Pin 1 and omits composite sync. Their pinouts differ at Pin 1, and neither is pin-compatible or functionally interchangeable without PCB redesign. GS4882-CTAE3 is not a drop-in replacement for GS4982 in horizontal-sync-dependent systems.

GS4882-CTAE3 Specifications

Product attributes: Attribute value

Manufacturer:: Semtech Corporation

Series:: -

Package/Case:: -

Packaging:: Tape & Reel (TR)

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

GS4882-CTAE3 FAQ

1.How can I place an order for GS4882-CTAE3 through Aetrix?

Please submit a Request for Quotation (RFQ) for GS4882-CTAE3 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 GS4882-CTAE3 reliable?

The price and inventory of GS4882-CTAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GS4882-CTAE3 is usually 5 days.

3.What payment methods are accepted for GS4882-CTAE3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GS4882-CTAE3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for GS4882-CTAE3?

GS4882-CTAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your GS4882-CTAE3 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 GS4882-CTAE3?

For technical support, including GS4882-CTAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GS4882-CTAE3 requirements.

6.How does Aetrix verify that GS4882-CTAE3 is sourced from the original manufacturer or authorized distributors?

All GS4882-CTAE3 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 GS4882-CTAE3 meets industry standards.

7.What is the process for return or replacement of GS4882-CTAE3?

All GS4882-CTAE3 units undergo pre-shipment inspection (PSI). If there is an issue with GS4882-CTAE3, 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 GS4882-CTAE3 part is unused and in its original packaging.

Return procedure for GS4882-CTAE3:

1.Submit a request within 90 days.

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

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