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Semtech Corporation GS9005BCTJE3
- Part No.:
- GS9005BCTJE3
- Manufacturer:
- Semtech Corporation
- Category:
- Video Processing
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
GS9005BCTJE3.pdf
- Description:
- IC VIDEO RCVR 28PLCC 750/REEL
- Quantity:
- Payment:
- Shipping:
Inventory:1,123
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Product details
Overview
GS9005BCTJE3 from Gennum Corporation is a monolithic SMPTE 259M serial digital video receiver IC performing automatic cable equalization (up to 300m at 270 Mb/s) and data/clock recovery. It operates from a single +5 V supply, delivers ±100 ps p-p output jitter at 270 Mb/s, and supports bit rates from 100 to 400 Mb/s. It interfaces directly with GS9000B/GS9000S decoders and the GS9010A Automatic Tuning Subsystem in broadcast video infrastructure.
For engineers reviewing the GS9005BCTJE3 datasheet, pinout, applications, or equivalent options, this device serves as a reclocking receiver for SD-SDI signal conditioning-requiring precise VCO resistor selection, AGC capacitor placement, and ECL-level differential I/O termination.
Technical Context
The GS9005BCTJE3 implements a bipolar PLL-based reclocker with voltage-variable analog cable equalizer, DC restorer, and peak-detect AGC loop. Its VCO center frequency is set by one of four external resistors (RVCO0–RVCO3) selected via SS0/SS1 logic inputs, enabling standard-specific tuning for 4ƒsc NTSC/PAL and 4:2:2 formats.
It features dual input paths: differential analog SDI/SDI (pins 8,9) for cable-equalized signals and differential pseudo-ECL DDI/DDI (pins 5,6) for direct digital inputs, selected by TTL-compatible A/D pin (pin 1). The OUTPUT 'EYE' MONITOR (pin 16) provides analog integrity verification pre-reslicing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Serial Data Rate | 100–400 Mb/s - supports SMPTE 259M-compliant SD-SDI, including 270 Mb/s (4ƒsc NTSC), 360 Mb/s (4:2:2), and 143/177 Mb/s variants |
| Supply Voltage | +5 V (4.75–5.25 V) - single-supply operation simplifies power design; no negative rail required for core functionality |
| Output Jitter | ±100 ps p-p at 270 Mb/s - ensures robust eye opening and low BER in regenerated serial data paths |
| Equalizer Gain | 30–36 dB at 135 MHz - compensates high-frequency loss in coaxial cable up to ~300 m of high-quality RG-6 |
| Signal Strength Indicator | 0.5 V to 0 V analog output (pin 28) - linearly tracks AGC control voltage, enabling real-time cable length estimation |
| Carrier Detect | Open-collector active-high output (pin 19) - asserts when valid signal present on SDI or DDI inputs; used for automatic standard switching with GS9010A |
| Input Resistance | 3 kΩ–5 kΩ (pins 5,6,8,9) - matches typical ECL and AC-coupled coax interface impedances without external termination |
Pinout & Package
GS9005BCTJE3 is housed in a 28-pin Plastic Leaded Chip Carrier (PLCC) package, Pb-free and RoHS-compliant (Green), rated for 0°C to 70°C operating temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A/D) | Analog/Digital Select Input | TTL-compatible control: HIGH selects equalized analog path (SDI/SDI); LOW selects direct digital path (DDI/DDI) |
| 5,6 (DDI/DDI) | Differential Direct Digital Inputs | Pseudo-ECL inputs self-biased to 1.2 V below VCC; require 390 Ω pull-downs to VEE for proper ECL-level operation |
| 8,9 (SDI/SDI) | Differential Serial Data Inputs | AC-coupled analog inputs for coax-fed SD-SDI; unused input must be decoupled to avoid noise pickup |
| 12 (LOOP FILT) | PLL Loop Filter Node | Connection point for second-order RC loop filter; voltage range 1.8–2.7 V determines PLL stability and lock time |
| 13–17 (RVCO0–RVCO3) | VCO Center Frequency Resistors | Four analog current-setting inputs; selected via SS0/SS1 to configure VCO for specific data standards (e.g., RVCO0 for 270 Mb/s) |
| 16 (OEM) | Output Eye Monitor | Analog voltage (≤40 mVp-p) representing equalized signal pre-reslicing; used for integrity validation and debug |
| 19 (CD) | Carrier Detect Output | Open-collector output pulled HIGH when valid signal detected; requires ~10 kΩ pull-up to VCC for logic interfacing |
| 22,23 (SCO/SCO) | Differential Serial Clock Outputs | Pseudo-ECL clock outputs requiring 390 Ω pull-downs to VEE; phase-centered on data eye for optimal sampling |
| 24,25 (SDO/SDO) | Differential Serial Data Outputs | Regenerated NRZI data outputs with 700–900 mVp-p swing; matched to SCO timing for jitter-tolerant latching |
| 28 (SSI) | Signal Strength Indicator | Analog output (0 to −0.6 V w.r.t. VCC) proportional to AGC action - lower voltage indicates greater equalization/cable loss |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Cable Equalization | Adaptive analog filtering compensates up to ~300 m of coax at 270 Mb/s without manual tuning or external calibration |
| Adjustment-Free Operation with GS9010A | When paired with GS9010A ATS, eliminates need for manual VCO resistor selection and temperature compensation across 0–70°C |
| Dual Input Path Architecture | Hardware-selectable analog (cable) or digital (backplane) input routing enables flexible system integration in hybrid broadcast equipment |
| Standard-Selectable VCO Center Frequency | Two-bit SS0/SS1 control selects among four VCO resistors to match 4ƒsc NTSC, 4ƒsc PAL, or 4:2:2 data rates |
| Real-Time Signal Integrity Monitoring | OEM (pin 16) and SSI (pin 28) outputs provide analog visibility into equalization performance and cable health diagnostics |
Applications
| Broadcast SD-SDI Reclocker | Multi-Standard Video Decoder Front-End |
|---|---|
Use Scenario: Receiving and regenerating 270 Mb/s SD-SDI signals from long coax runs in studio routers or distribution amplifiers. IC Role / Device Role / Timing Role: Reclocking receiver performing cable equalization, clock/data recovery, and jitter reduction prior to decoding. Use Value: Maintains >30 dB equalizer gain and <±100 ps jitter at 270 Mb/s, preserving eye opening for reliable downstream GS9000B/GS9000S decoding. |
Use Scenario: Feeding standardized serial data to GS9000B or GS9000S decoders in multi-format production switchers supporting NTSC, PAL, and 4:2:2. IC Role / Device Role / Timing Role: Standard-aware reclocker providing carrier detect and VCO tuning coordination with GS9010A ATS. Use Value: Enables automatic standard detection and seamless switching between 4ƒsc and 4:2:2 streams without firmware intervention or manual reconfiguration. |
| SDI Signal Integrity Test Point | Legacy Broadcast Equipment Upgrade |
Use Scenario: In-circuit monitoring of SD-SDI signal quality during field deployment or maintenance using OEM and SSI outputs. IC Role / Device Role / Timing Role: Diagnostic interface providing analog representations of equalized waveform (OEM) and AGC level (SSI). Use Value: Allows real-time assessment of cable degradation or connector faults without external oscilloscope-voltage drop on SSI directly correlates with cable length loss. |
Use Scenario: Retrofitting aging SDI receivers in OB vans or master control rooms with improved jitter performance and longer cable reach. IC Role / Device Role / Timing Role: Drop-in replacement for earlier Gennum receivers (e.g., GS9005A) with enhanced 400 Mb/s capability and Pb-free packaging. Use Value: Extends usable coax distance by ~20% at 270 Mb/s and reduces bit error rate in marginal installations via tighter jitter control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial digital receiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GS9005BCPJ | Same die and functionality, but packaged in non-Pb-free 28-pin PLCC; RoHS exemption applies | Identical electrical performance and pinout; differs only in lead finish and compliance status | Select GS9005BCPJ only if RoHS exemption is approved and legacy supply chain mandates non-Green packaging |
| GS9015BCTJE3 | Functionally identical reclocker but lacks integrated cable equalizer; requires external equalization or short-cable use | Used where signal integrity is maintained via backplane or short cables-eliminates AGC loop complexity | Choose GS9015BCTJE3 when equalization is unnecessary or handled upstream; saves board space and simplifies biasing |
Compared with GS9005BCPJ, GS9005BCTJE3 offers full RoHS compliance without performance trade-offs; compared with GS9015BCTJE3, it adds essential equalization for coax-based SD-SDI but increases component count and layout sensitivity.
Availability
GS9005BCTJE3 is available at Aetrix Electronics and suitable for broadcast video infrastructure, SD-SDI signal regeneration, and multi-standard decoder front-end designs requiring stable component supply and long-lifecycle support.
Supply support for GS9005BCTJE3 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 professional video, communications, and data acquisition until its acquisition by Microchip Technology in 2012.
The GS9005BCTJE3 belongs to Gennum's GENLINX™ family of SMPTE-compliant serial digital receivers, designed specifically for robust SD-SDI signal conditioning in broadcast-grade equipment.
FAQ
What is the primary function of the GS9005BCTJE3 in an SD-SDI system?
The GS9005BCTJE3 functions as a reclocking receiver that performs automatic cable equalization and data/clock recovery on SMPTE 259M serial digital video signals. It restores signal integrity degraded by coaxial cable loss and outputs regenerated NRZI data and clock with low jitter. This enables reliable feeding of downstream decoders like the GS9000B or GS9000S, and the GS9005BCTJE3 is explicitly designed for broadcast video infrastructure where cable lengths exceed 100 meters.
How does the GS9005BCTJE3 achieve automatic cable equalization without manual adjustment?
The GS9005BCTJE3 uses an analog voltage-variable filter whose transfer function inversely matches coaxial cable loss characteristics. A peak detector monitors the equalized signal amplitude and integrates its output via an external AGC capacitor (pin 2) to generate a feedback control voltage. This closed-loop AGC system dynamically adjusts the filter gain to maintain constant output amplitude, enabling automatic equalization across varying cable lengths-up to ~300 m at 270 Mb/s-without user tuning.
Which pins on the GS9005BCTJE3 require external passive components, and why?
The GS9005BCTJE3 requires external components on several pins: AGC CAP (pin 2) needs a capacitor for loop stability; LOOP FILT (pin 12) connects to an RC network defining PLL bandwidth; RVCO0–RVCO3 (pins 13,14,15,17) each require a precision resistor to set VCO center frequency; and SDO/SCO outputs (pins 24,25,22,23) demand 390 Ω pull-down resistors to VEE for proper pseudo-ECL termination. These components are critical for AGC convergence, PLL lock time, standard-selectable frequency accuracy, and signal integrity.
Can the GS9005BCTJE3 operate with a -5 V supply instead of +5 V?
Yes, the GS9005BCTJE3 supports dual-supply operation: it can be configured for either +5 V (with VCC = +5 V, VEE = 0 V) or -5 V (with VCC = 0 V, VEE = -5 V) supplies, as confirmed in the datasheet's Figure 15 test circuit. Power pin assignments shift accordingly-VEE1/VEE2/VEE3 become the most negative rail, and VCC1/VCC2/VCC3/VCC4 become the most positive. All I/O thresholds and internal biasing adapt to the chosen supply polarity, maintaining full functionality in both configurations.
What is the role of the OUTPUT 'EYE' MONITOR (pin 16) and Signal Strength Indicator (pin 28)?
The OUTPUT 'EYE' MONITOR (pin 16) provides an analog voltage representation of the equalized serial bit stream before reslicing-used for oscilloscope-based signal integrity validation. The Signal Strength Indicator (pin 28) outputs a 0 to −0.6 V analog voltage relative to VCC, directly proportional to AGC action; lower voltage indicates greater equalization effort and thus longer effective cable length. Both outputs enable real-time diagnostics without interrupting normal operation of the GS9005BCTJE3.
GS9005BCTJE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- GenLINX® III
- Package/Case:
- 28-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Receiver
- Applications:
- Professional Video
- Standards:
- SMPTE
- Control Interface:
- Serial
- Voltage - Supply:
- 4.75V ~ 5.25V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 28-PLCC (12x12)
GS9005BCTJE3 FAQ
1.How can I place an order for GS9005BCTJE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for GS9005BCTJE3 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 GS9005BCTJE3 reliable?
The price and inventory of GS9005BCTJE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GS9005BCTJE3 is usually 5 days.
3.What payment methods are accepted for GS9005BCTJE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GS9005BCTJE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GS9005BCTJE3?
GS9005BCTJE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GS9005BCTJE3 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 GS9005BCTJE3?
For technical support, including GS9005BCTJE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GS9005BCTJE3 requirements.
6.How does Aetrix verify that GS9005BCTJE3 is sourced from the original manufacturer or authorized distributors?
All GS9005BCTJE3 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 GS9005BCTJE3 meets industry standards.
7.What is the process for return or replacement of GS9005BCTJE3?
All GS9005BCTJE3 units undergo pre-shipment inspection (PSI). If there is an issue with GS9005BCTJE3, 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 GS9005BCTJE3 part is unused and in its original packaging.
Return procedure for GS9005BCTJE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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