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Texas Instruments LMH0344GR/NOPB
- Part No.:
- LMH0344GR/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 25-TFBGA, CSPBGA
- Datasheet:
-
LMH0344GR/NOPB.pdf
- Description:
- IC INTFACE SPECIALIZED 25CSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,833
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Product details
Overview
LMH0344GR/NOPB from Texas Instruments is a 3-Gbps HD/SD SDI adaptive cable equalizer IC designed for serial digital video signal recovery over dispersive coaxial media. It supports SMPTE ST 424 (3G), ST 292 (HD), ST 344 (HD-SDI), and ST 259 (SD) standards, operates from 125 Mbps to 2.97 Gbps, equalizes up to 120 m of Belden 1694A at 2.97 Gbps with ≤0.3 UI output jitter, and features DC restoration, carrier detect, and programmable mute - deployed in broadcast camera backends and video routing switchers.
For engineers reviewing the LMH0344GR/NOPB datasheet, LMH0344GR/NOPB pinout, LMH0344GR/NOPB application, or LMH0344GR/NOPB equivalent, key selection considerations include input data rate range (125–2970 Mbps), differential input/output interface, 3.3-V single-supply operation, WQFN-16 package footprint, and compliance with SMPTE ST 424/292/344/259 physical layer requirements.
Technical Context
The LMH0344GR/NOPB implements a multistage adaptive filter controlled by an external 1-µF AEC capacitor across AEC+ and AEC− pins, enabling real-time equalization adjustment based on cable loss. Its DC restoration block fully restores baseline for pathological video patterns per SMPTE RP 178 and RP 198.
Carrier detection uses energy-based thresholding referenced to MUTEREF voltage (0.6–1.3 V typical), with CD output asserting high when no valid signal is present. The BYPASS pin disables both equalization and DC restoration, routing input directly to output with no processing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate Range | 125 Mbps to 2.97 Gbps - supports full SMPTE SD/HD/3G-SDI hierarchy without reconfiguration. |
| Input Voltage Swing | 720–950 mVP–P differential - matches standard 75-Ω coaxial source levels with AC-coupled interface. |
| Output Voltage Swing | 750 mVP–P differential into 100-Ω load - compliant with SMPTE receiver input requirements. |
| Max Output Jitter | 0.3 UI at 2.97 Gbps - ensures eye opening meets ST 424 timing margin for reliable clock recovery. |
| Supply Voltage | 3.135–3.465 V - single 3.3-V rail simplifies power design; 280-mW typical consumption enables dense video PCB layouts. |
| Cable Equalization | Up to 120 m Belden 1694A at 2.97 Gbps - enables long-haul camera-to-control-room links in broadcast infrastructure. |
| ESD Rating | ±8 kV HBM - robust handling during board assembly and field service in studio environments. |
Pinout & Package
LMH0344GR/NOPB is packaged in a 4.00 mm × 4.00 mm, 16-pin WQFN (RUM) with exposed thermal pad connected to VEE. Pin functions are validated per TI SNLS233O Rev O datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDI / SDI | Differential analog input | Accepts AC-coupled 75-Ω SDI signal pair; supports single-ended mode with one input grounded. |
| SDO / SDO | Differential analog output | 50-Ω internally terminated outputs deliver 750 mVP–P into 100-Ω load; no external termination required. |
| AEC+ / AEC− | Analog loop filter terminals | Connect external 1-µF capacitor to set adaptive equalizer bandwidth and convergence speed. |
| MUTE / CD | Digital control inputs | MUTE forces output low; CD asserts high when no carrier detected - tied together for auto-mute on signal loss. |
| MUTEREF | Analog reference input | Sets carrier detect threshold; 0 V = max cable length before mute, increasing voltage reduces equalization range. |
| BYPASS | LVCMOS enable input | High disables equalization and DC restoration - used for diagnostics or bypassing degraded cables. |
| VCC / VEE | Power supply rails | 3.3-V single supply; VEE is ground reference; exposed DAP must connect to VEE for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive equalization | Real-time compensation for frequency-dependent loss in coaxial cable up to 120 m at 3G-SDI rates. |
| DC restoration | Self-biasing circuit maintains baseline integrity for pathological video patterns (e.g., SMPTE RP 198). |
| Programmable mute threshold | MUTEREF voltage (0.6–1.3 V) sets precise cable-length-dependent muting point without firmware. |
| Carrier detect logic | Dedicated CD pin provides TTL-compatible status for system-level signal presence monitoring. |
| Single-supply operation | 3.3-V rail eliminates need for negative supplies - reduces BOM count and layout complexity. |
Applications
| Broadcast Camera Backend | Video Routing Switcher |
|---|---|
Use Scenario: Recovering degraded SDI signals from long coaxial runs between camera heads and base stations. IC Role / Device Role / Timing Role: Adaptive cable equalizer restoring signal integrity prior to deserialization and FPGA processing. Use Value: Enables 120 m of Belden 1694A at 2.97 Gbps while maintaining <0.3 UI jitter - preserves SMPTE ST 424 eye mask compliance. | Use Scenario: Signal conditioning in multi-input video matrix switchers handling mixed SD/HD/3G sources. IC Role / Device Role / Timing Role: Input-stage equalizer ensuring consistent signal amplitude and jitter across diverse cable lengths and formats. Use Value: Wide 125–2970 Mbps data rate support allows single design to handle ST 259 through ST 424 without hardware changes. |
| Studio Monitor Interface | OEM Broadcast Encoder |
Use Scenario: Driving high-fidelity SDI signals to professional monitors over extended cable runs. IC Role / Device Role / Timing Role: Output driver with internal 50-Ω termination delivering clean 750 mVP–P differential output. Use Value: Eliminates need for external termination resistors - reduces component count and improves impedance matching. | Use Scenario: Integrating SDI input conditioning into compact encoder modules for live streaming systems. IC Role / Device Role / Timing Role: Front-end equalizer with BYPASS pin enabling factory test mode and field diagnostics. Use Value: BYPASS functionality allows direct signal pass-through for validation without equalizer artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SDI equalizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH0384RTVT | Same 3-Gbps capability but in 3-mm × 3-mm 25-ball CS-BGA package; higher thermal resistance (58.1°C/W vs. 40°C/W). | Preferred where board space is constrained and thermal management via heatsinking is feasible. | Select LMH0384RTVT only if footprint reduction outweighs thermal derating needs in high-density enclosures. |
| GS2974B | Legacy Semtech part replaced by LMH0344; lacks programmable MUTEREF and has fixed mute threshold. | Used in legacy designs requiring drop-in replacement with minimal schematic change. | LMH0344GR/NOPB offers superior flexibility via MUTEREF tuning but requires minor layout update for AEC capacitor placement. |
Compared with LMH0384RTVT, LMH0344GR/NOPB delivers lower thermal resistance and larger PCB land pattern compatibility with LMH0044/LMH0074; versus GS2974B, it adds adjustable muting and improved jitter performance at 3G rates - making it optimal for new broadcast hardware development.
Availability
LMH0344GR/NOPB is available at Aetrix Electronics and suitable for broadcast camera backends, video routing switchers, studio monitor interfaces, and OEM broadcast encoders requiring stable component supply across production lifecycles.
Supply support for LMH0344GR/NOPB 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 connectivity technologies for industrial, automotive, and communications markets.
The LMH0344GR/NOPB belongs to TI's high-speed video interface product line, engineered specifically for SMPTE-compliant SDI signal conditioning in professional broadcast and production equipment.
FAQ
What is the maximum cable length LMH0344GR/NOPB can equalize at 2.97 Gbps?
The LMH0344GR/NOPB equalizes up to 120 meters of Belden 1694A coaxial cable at 2.97 Gbps while maintaining ≤0.3 UI output jitter and meeting SMPTE ST 424 eye mask requirements. Performance depends on cable quality and environmental conditions; actual reach may vary slightly with installation practices and connector integrity.
Does LMH0344GR/NOPB require external termination resistors on its SDO/SDO outputs?
No, LMH0344GR/NOPB integrates 50-Ω internal termination on both SDO and SDO outputs, delivering a 750 mVP–P differential signal into a 100-Ω load. External termination is unnecessary, reducing component count and improving impedance consistency in high-speed SDI layouts.
How does the MUTEREF pin affect carrier detection behavior in LMH0344GR/NOPB?
The MUTEREF pin sets the threshold voltage for the carrier detect (CD) function in LMH0344GR/NOPB. When left unconnected or tied to ground, CD triggers at maximum cable length; applying 0.6–1.3 V scales the threshold inversely - higher voltage reduces allowable cable length before CD asserts high and mutes output.
Can LMH0344GR/NOPB operate with single-ended input signals?
Yes, LMH0344GR/NOPB supports single-ended input configuration: tie one SDI pin to ground and drive the other with an AC-coupled 75-Ω signal. However, differential mode is preferred for superior common-mode noise rejection and compliance with SMPTE return loss specifications.
What is the purpose of the BYPASS pin on LMH0344GR/NOPB?
The BYPASS pin on LMH0344GR/NOPB disables both the adaptive equalizer filter and DC restoration blocks when driven high, passing the input signal directly to the output. This mode enables diagnostic testing, signal integrity verification, and fallback operation when cable loss is minimal or unknown.
LMH0344GR/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 25-TFBGA, CSPBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Data Transport
- Interface:
- Serial
- Voltage - Supply:
- 3.135V ~ 3.465V
- Supplier Device Package:
- 25-CSBGA (3x3)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
LMH0344GR/NOPB FAQ
1.How can I place an order for LMH0344GR/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH0344GR/NOPB 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 LMH0344GR/NOPB reliable?
The price and inventory of LMH0344GR/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH0344GR/NOPB is usually 5 days.
3.What payment methods are accepted for LMH0344GR/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH0344GR/NOPB transactions.
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4.How is shipping managed for LMH0344GR/NOPB?
LMH0344GR/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH0344GR/NOPB 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 LMH0344GR/NOPB?
For technical support, including LMH0344GR/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH0344GR/NOPB requirements.
6.How does Aetrix verify that LMH0344GR/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH0344GR/NOPB 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 LMH0344GR/NOPB meets industry standards.
7.What is the process for return or replacement of LMH0344GR/NOPB?
All LMH0344GR/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH0344GR/NOPB, 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 LMH0344GR/NOPB part is unused and in its original packaging.
Return procedure for LMH0344GR/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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