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Texas Instruments LMH1208RTVR
- Part No.:
- LMH1208RTVR
- Manufacturer:
- Texas Instruments
- Category:
- Video Processing
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LMH1208RTVR.pdf
- Description:
- IC VIDEO CABLE DRIVER 32WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,519
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Product details
Overview
LMH1208RTVR from Texas Instruments is a 12G UHD-SDI dual-output cable driver IC supporting SMPTE ST-2082-1 (11.88 Gbps), ST-2081-1 (6G), and legacy SD/HD rates. It features two 75-Ω differential cable drivers (SDI_OUT1±, SDI_OUT2±), one 100-Ω host-side loop-back driver (OUT0±), on-chip 75-Ω termination with return-loss compensation, and programmable slew rate/pre-emphasis. It is used in broadcast-grade 4K/8K video routing and IP media gateways.
For engineers reviewing the LMH1208RTVR datasheet, LMH1208RTVR pinout, LMH1208RTVR application, or LMH1208RTVR equivalent, this page delivers verified technical context, real-world signal integrity parameters (e.g., 34 ps rise time at 12G, –8 dB return loss up to 12 GHz), package-mapped pin functions, and validated alternatives for SMPTE-compliant serial digital interface design.
Technical Context
The LMH1208RTVR integrates a continuous-time linear equalizer (CTLE) on its IN0± input to compensate for PCB trace loss up to 20 inches, enabling robust signal recovery before distribution. Its dual 75-Ω cable drivers support independent enable control (SDI_OUT2_SEL), programmable output amplitude (SDI_VOD: 760–880 mVp-p), and slew-rate-dependent pre-emphasis (up to 2 dB).
The 100-Ω host-side output (OUT0±) provides a low-jitter, de-emphasized loop-back path with selectable amplitude (410–810 mVp-p) and de-emphasis (0–7 dB), configurable via HOST_EQ0. Signal Detect (SD_N) and automatic Power Save Mode reduce power to 25 mW when no valid input is present.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate Support | Up to 11.88 Gbps (SMPTE ST-2082-1); enables uncompressed 4K60/8K30 UHD-SDI transmission. |
| Rise Time (tR) | 34–42 ps at 12G (20–80%); ensures clean edge fidelity for high-speed serial eye compliance. |
| Output Return Loss | –8 dB at 6–12 GHz (SDI_OUT1±/SDI_OUT2±); meets SMPTE ST-2082 return loss specification. |
| Power Dissipation | 200 mW typical (all outputs enabled, 12G); 25 mW in Power Save Mode - critical for thermal management in dense video chassis. |
| Supply Voltage | Single 2.5 V ±5%; simplifies power architecture vs. multi-rail solutions. |
| Input Termination | 100 Ω differential on IN0±; eliminates need for external termination resistors in host processor interface. |
| Operating Temp | –40°C to +85°C; qualified for broadcast equipment and industrial video infrastructure. |
Pinout & Package
LMH1208RTVR is housed in a 5.0 mm × 5.0 mm, 32-pin WQFN (RTV) package with exposed thermal pad (EP = VSS). The package supports high-density PCB layouts and efficient heat dissipation via 3×3 thermal via array to ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN0+, IN0– | Differential video input | Host-side 100-Ω terminated SMPTE input; accepts AC-coupled signals up to 11.88 Gbps with CTLE equalization. |
| SDI_OUT1+, SDI_OUT1– | Primary 75-Ω cable driver output | Always-enabled, on-chip 75-Ω termination and return-loss network; connects directly to BNC via 4.7-µF AC coupling. |
| SDI_OUT2+, SDI_OUT2– | Secondary 75-Ω cable driver output | Pin-controlled enable (SDI_OUT2_SEL); identical electrical specs to SDI_OUT1± for redundant or dual-path routing. |
| OUT0+, OUT0– | 100-Ω host-side loop-back output | Configurable de-emphasis and amplitude; used for real-time monitoring, signal analysis, or feed-forward paths in video processors. |
| ENABLE | Global power control | LVCMOS input; logic high enables full operation; internal pull-up ensures default active state after power-up. |
| SD_N | Signal detect indicator | Open-drain output pulled low when valid signal detected at IN0±; supports fault reporting and auto-power-save activation. |
| SLEW_CTRL | Slew rate & pre-emphasis selector | 4-level input; sets edge rate and pre-emphasis level per data rate (e.g., 34 ps / 2 dB at 12G). |
| MODE_SEL | Interface mode select | 4-level input; configures serial control as SPI (float) or SMBus (pull-low); determines pin mapping for ADDR0/ADDR1 vs. SS_N/MISO/SCK. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 75-Ω cable drivers with integrated RL network | Eliminates external termination components and meets SMPTE ST-2082 return loss spec without board-level tuning. |
| Programmable slew rate & pre-emphasis | Four settings (via SLEW_CTRL) optimize signal integrity across 270 Mbps–11.88 Gbps; reduces ISI and improves eye opening. |
| Host-side 100-Ω loop-back output | Enables non-intrusive monitoring of processed video signal without splitting or tapping main path - critical for broadcast reliability. |
| Automatic Power Save Mode | Reduces power to 25 mW when no input signal is detected (via SD_N logic), lowering thermal load during idle or fault conditions. |
| Flexible serial control interface | Pin-strapped selection between SPI and SMBus (MODE_SEL); supports register-level configuration of VOD, EQ, DE, polarity, and status reads. |
Applications
| UHD Broadcast Routing | IP Media Gateway |
|---|---|
|
Use Scenario: Distributing 12G-SDI signals from camera ingest to multiple processing nodes in OB vans or studio routers. IC Role / Device Role / Timing Role: Dual cable driver providing simultaneous output to primary and backup distribution paths with matched jitter and amplitude. Use Value: Maintains SMPTE-compliant return loss (<–8 dB @ 12 GHz) and additive jitter (0.03 UI) across both outputs - ensuring error-free transmission over 100 m coax. |
Use Scenario: Bridging baseband UHD-SDI video into IP-based transport (e.g., SMPTE 2110) using FPGA-based media gateways. IC Role / Device Role / Timing Role: Host-side loop-back (OUT0±) feeds cleaned, de-emphasized signal to FPGA transceiver for serialization; cable drivers (SDI_OUT1±) feed legacy monitors. Use Value: Eliminates need for external re-timers or splitters - reduces latency, BOM count, and board area while preserving signal integrity at 11.88 Gbps. |
| Digital Video Editing Workstation | 4K/8K Production Monitor Interface |
|
Use Scenario: High-bandwidth video I/O on PCIe-based capture/playout cards handling multiple 4K streams. IC Role / Device Role / Timing Role: Input equalization (HOST_EQ0) compensates for long PCB traces from connector to FPGA; dual outputs drive internal processing and external monitor feed. Use Value: CTLE extends usable trace length to 20 inches at 12G, enabling flexible card layout without signal degradation or external EQ ICs. |
Use Scenario: Driving reference monitors in color grading suites requiring zero-latency, SMPTE-accurate signal reproduction. IC Role / Device Role / Timing Role: Primary cable driver (SDI_OUT1±) delivers calibrated 75-Ω output; secondary (SDI_OUT2±) feeds waveform monitor or recording device. Use Value: Independent amplitude (SDI_VOD) and slew control per output allows precise matching of monitor input sensitivity and cable loss profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UHD-SDI cable driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH1228RTVR | Pin-compatible with LMH1208RTVR but includes integrated reclocker; higher power (320 mW typ), no Power Save Mode. | Required where input jitter cleanup is needed before distribution; not suitable for pure pass-through or low-power monitoring use cases. | Select LMH1228RTVR only if reclocking is mandatory; otherwise LMH1208RTVR offers lower power and simpler timing architecture. |
| GS2972AIBE3 | Single 75-Ω output; supports 12G but lacks 100-Ω loop-back, programmable slew, or automatic Power Save Mode. | Used in cost-sensitive, single-output routing; cannot replace LMH1208RTVR's dual-output + monitoring capability in broadcast infrastructure. | Choose GS2972AIBE3 for basic 12G distribution where loop-back monitoring and ultra-low idle power are unnecessary. |
Compared with LMH1228RTVR and GS2972AIBE3, the LMH1208RTVR uniquely balances dual-output flexibility, host-side monitoring, adaptive power management, and SMPTE-compliant signal integrity - making it optimal for scalable, energy-efficient UHD video systems requiring both distribution and diagnostics.
Availability
LMH1208RTVR is available at Aetrix Electronics and suitable for UHD broadcast routing, IP media gateway interfaces, and 4K/8K production monitor systems requiring stable component supply, long-term lifecycle assurance, and SMPTE-compliant performance.
Supply support for LMH1208RTVR 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-speed interface solutions for industrial, automotive, and communications markets.
The LMH1208RTVR belongs to TI's high-speed serial interface product line, engineered specifically for SMPTE-compliant UHD-SDI video infrastructure - emphasizing signal integrity, low power, and system-level integration in broadcast and professional AV equipment.
FAQ
What is the maximum supported data rate for LMH1208RTVR?
The LMH1208RTVR supports up to 11.88 Gbps, compliant with SMPTE ST-2082-1 for 12G UHD-SDI applications including 4K60 and 8K30 video. Electrical characteristics such as 34 ps rise time and –8 dB return loss at 12 GHz are validated at this rate. Lower rates (6G, 3G, HD, SD) are also fully supported with appropriate slew and pre-emphasis settings.
Does LMH1208RTVR require external termination resistors on its inputs or outputs?
No. The LMH1208RTVR integrates 100-Ω differential termination on IN0± and 75-Ω single-ended termination on SDI_OUT1± and SDI_OUT2±, along with on-die return-loss compensation networks. External 4.7-µF AC-coupling capacitors are required, but no external termination resistors are needed - reducing BOM count and layout complexity.
How does the Power Save Mode work on LMH1208RTVR?
LMH1208RTVR enters Power Save Mode automatically when no valid signal is detected at IN0±, reducing power consumption to 25 mW. This is controlled by the internal Signal Detect circuit, whose status is reported on the open-drain SD_N pin. ENABLE must remain high; Power Save Mode is distinct from Power-Down Mode (activated by pulling ENABLE low).
Can LMH1208RTVR drive two independent 75-Ω coaxial cables simultaneously?
Yes. LMH1208RTVR provides two independent 75-Ω differential cable drivers: SDI_OUT1± (always enabled) and SDI_OUT2± (enabled via SDI_OUT2_SEL pin). Both outputs feature identical 75-Ω termination, return-loss compensation, and programmable amplitude/slew, enabling true dual-path distribution without signal degradation.
What serial interface options does LMH1208RTVR support for configuration?
LMH1208RTVR supports both SPI and SMBus interfaces, selected via the MODE_SEL pin. When MODE_SEL is floated, pins SS_N, MOSI, MISO, and SCK function as SPI; when MODE_SEL is pulled low, pins ADDR0, ADDR1, SDA, and SCL become active for SMBus. Both interfaces allow full register access for VOD, EQ, DE, polarity, and status monitoring.
LMH1208RTVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Driver
- Applications:
- Professional Video
- Standards:
- AES10, DVB-ASI, SMPTE
- Control Interface:
- Serial
- Voltage - Supply:
- 2.375V ~ 2.625V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 32-WQFN (5x5)
LMH1208RTVR FAQ
1.How can I place an order for LMH1208RTVR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH1208RTVR 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 LMH1208RTVR reliable?
The price and inventory of LMH1208RTVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH1208RTVR is usually 5 days.
3.What payment methods are accepted for LMH1208RTVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH1208RTVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH1208RTVR?
LMH1208RTVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH1208RTVR 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 LMH1208RTVR?
For technical support, including LMH1208RTVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH1208RTVR requirements.
6.How does Aetrix verify that LMH1208RTVR is sourced from the original manufacturer or authorized distributors?
All LMH1208RTVR 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 LMH1208RTVR meets industry standards.
7.What is the process for return or replacement of LMH1208RTVR?
All LMH1208RTVR units undergo pre-shipment inspection (PSI). If there is an issue with LMH1208RTVR, 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 LMH1208RTVR part is unused and in its original packaging.
Return procedure for LMH1208RTVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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