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Texas Instruments LMH0344GRE/NOPB
- Part No.:
- LMH0344GRE/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 25-TFBGA, CSPBGA
- Datasheet:
-
LMH0344GRE/NOPB.pdf
- Description:
- IC INTFACE SPECIALIZED 25CSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,884
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Product details
Overview
LMH0344GRE/NOPB from Texas Instruments is a 3-Gbps HD/SD SDI adaptive cable equalizer IC designed for serial digital video signal recovery over coaxial cable. It supports SMPTE ST 424, ST 292, ST 344, and ST 259 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 functionality in broadcast infrastructure receivers.
For engineers reviewing the LMH0344GRE/NOPB datasheet, LMH0344GRE/NOPB pinout, LMH0344GRE/NOPB application, or LMH0344GRE/NOPB equivalent, key selection considerations include its adaptive equalization range, 3.3-V single-supply operation, WQFN-16 package compatibility with LMH0044/LMH0384, differential input/output interface, and compliance with broadcast-grade return loss and jitter requirements per RP 184/RP 192.
Technical Context
The LMH0344GRE/NOPB implements a multistage adaptive filter controlled by an external 1-µF AEC+–AEC− capacitor, enabling real-time compensation of dispersive loss in coaxial media. Its DC restoration block fully restores baseline wander on pathological video patterns (RP 178/RP 198), while the carrier detect (CD) and mute logic respond to signal presence using MUTEREF voltage thresholding.
It operates in two functional modes: active equalization (BYPASS low) and transparent bypass (BYPASS high). Input accepts AC-coupled single-ended or differential signals; outputs are internally terminated 50-Ω differential with 750 mVP–P swing into 100-Ω load, meeting SMPTE input return loss ≥10 dB from 5 MHz to 3 GHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate Range | 125 Mbps to 2.97 Gbps - supports SD, HD, and 3G-SDI video formats including ST 259, ST 292, ST 344, and ST 424. |
| Max Equalization Distance | 120 m Belden 1694A @ 2.97 Gbps - enables long-haul SDI signal recovery without repeaters in broadcast routing systems. |
| Output Jitter | ≤0.3 UI @ 2.97 Gbps - meets SMPTE RP 184 jitter compliance for reliable clock/data recovery in downstream deserializers. |
| Supply Voltage | 3.3 V ±4.5% - single-rail operation simplifies power design and matches standard SDI system rails. |
| Input Return Loss | ≥15 dB @ 5 MHz–1.5 GHz, ≥10 dB @ 1.5–3 GHz - ensures impedance matching to 75-Ω coax, minimizing reflections per ST 424 receiver requirements. |
| Power Consumption | 280 mW typical - enables thermal management in dense video processing modules without forced cooling. |
| ESD Rating | HBM ±8 kV - provides robust handling during board assembly and field service in broadcast equipment environments. |
Pinout & Package
The LMH0344GRE/NOPB is packaged in a 4.00 mm × 4.00 mm, 16-pin WQFN (RUM) with exposed die attach pad (DAP) connected to VEE. This RoHS-compliant, leadless package supports high-density PCB layouts and thermal dissipation via the DAP.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDI / SDI | Differential analog input | Accepts AC-coupled SDI data (true/complement); supports single-ended or differential drive per layout configuration. |
| SDO / SDO | Differential analog output | Delivers 750 mVP–P differential output into 100-Ω load; internally biased 50-Ω termination eliminates external resistors. |
| AEC+ / AEC− | Analog loop filter terminals | Connect external 1-µF capacitor to set adaptive equalizer bandwidth and convergence speed for varying cable lengths. |
| MUTEREF | Analog reference input | Sets carrier detect threshold; floating ≈1.3 V for max equalization; grounded for full-range operation; voltage increase reduces max cable length before mute. |
| CD | Digital output | LVCMOS high when no valid signal detected; used with MUTE to auto-disable output during loss-of-signal conditions. |
| MUTE | Digital input | LVCMOS high forces SDO/SDO to logic zero; low enables output; tied to CD for automatic mute on signal loss. |
| BYPASS | Digital input | LVCMOS high disables equalization and DC restoration, passing input directly to output - useful for diagnostics or short-cable paths. |
| VCC / VEE | Power supply terminals | +3.3 V and ground; VEE connects to DAP for thermal conduction; decoupling required within 1 cm of pins. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive equalization with external AEC capacitor | Enables dynamic compensation across 125 Mbps–2.97 Gbps without firmware or register programming - ideal for plug-and-play SDI infrastructure. |
| Integrated DC restoration | Eliminates baseline wander on SMPTE RP 178/RP 198 pathological video patterns, ensuring stable eye opening at receiver inputs. |
| Programmable carrier detect mute threshold | MUTEREF pin allows field-adjustable cable-length-based muting - critical for flexible deployment across studio, OB van, and remote production links. |
| Single 3.3-V supply with 280-mW typical draw | Reduces power delivery complexity and heat generation in multi-channel SDI distribution amplifiers and routers. |
| WQFN-16 footprint compatibility | Shares land pattern with LMH0044, LMH0384, and LMH0074 - enables hardware reuse and migration across TI's SDI equalizer portfolio. |
Applications
| Broadcast Video Routing | Studio Camera Interface |
|---|---|
Use Scenario: Signal conditioning in SDI matrix switchers receiving feeds from multiple cameras and sources over long coax runs. IC Role / Device Role / Timing Role: Adaptive equalizer restoring signal integrity prior to reclocking and switching; maintains jitter below RP 184 limits for error-free switching. Use Value: Enables reliable 2.97-Gbps 1080p60 routing over 120 m of Belden 1694A without manual gain adjustment or fixed-equalizer tuning. |
Use Scenario: Front-end conditioning of camera head output before transmission to control room over triax or coax. IC Role / Device Role / Timing Role: Cable equalizer compensating for high-frequency loss in long camera cables; DC restoration preserves black/white level accuracy. Use Value: Maintains SMPTE ST 292 compliance at camera output despite cable-induced attenuation and dispersion, preventing sync loss or color shift. |
| OB Van Signal Distribution | Medical Imaging Video Capture |
Use Scenario: Signal conditioning in mobile production units where cable lengths vary between camera positions and recording gear. IC Role / Device Role / Timing Role: Adaptive equalizer dynamically adjusting to changing cable lengths and signal degradation; BYPASS pin enables quick diagnostic mode. Use Value: Eliminates need for manual equalizer switches or external test equipment during rapid setup changes in live event environments. |
Use Scenario: Capturing uncompressed HD video from surgical endoscopes or diagnostic monitors over coaxial cabling in hospital rooms. IC Role / Device Role / Timing Role: SDI equalizer ensuring bit-accurate reconstruction of medical video frames; low jitter preserves timing-critical frame synchronization. Use Value: Guarantees zero pixel corruption or frame drop in real-time surgical video streams, supporting FDA-cleared imaging systems. |
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 optimized for lower power (190 mW) and includes integrated 75-Ω input termination; lacks MUTEREF programmability. | Better suited for space-constrained, low-power portable monitors; less flexible for variable-cable-length studio use. | Select LMH0384RTVT when input termination integration and power reduction outweigh mute-threshold adjustability needs. |
| GS2974B-INE3 | Pin-compatible Semtech device with identical 2.97-Gbps performance and AEC+/- pins; requires external 50-Ω output termination not integrated in LMH0344GRE/NOPB. | Requires additional board area and layout care for output termination; same carrier detect/mute architecture. | Choose GS2974B-INE3 only if existing designs already use Semtech ecosystem or require dual-sourcing with identical pinout. |
Compared with LMH0344GRE/NOPB, LMH0384RTVT reduces power and integrates input termination but sacrifices MUTEREF flexibility, while GS2974B-INE3 offers pin compatibility but adds external termination complexity - making LMH0344GRE/NOPB optimal for studio-grade adaptability and ease of use.
Availability
LMH0344GRE/NOPB is available at Aetrix Electronics and suitable for broadcast infrastructure, professional video routing, and medical imaging systems requiring stable component supply, long-lifecycle support, and SMPTE-compliant signal integrity.
Supply support for LMH0344GRE/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, with decades of leadership in broadcast and professional video signal conditioning.
The LMH0344GRE/NOPB belongs to TI's LMH SDI equalizer product line, engineered specifically for SMPTE-compliant serial digital video infrastructure - delivering adaptive equalization, DC restoration, and robust signal recovery in broadcast, studio, and medical video systems.
FAQ
What is the maximum cable length LMH0344GRE/NOPB can equalize at 2.97 Gbps?
The LMH0344GRE/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 compliance. Performance depends on cable quality and environmental factors; actual reach may vary slightly with installation conditions. LMH0344GRE/NOPB achieves this using adaptive filtering and DC restoration optimized for high-definition video pathological patterns.
Does LMH0344GRE/NOPB support both SD-SDI and HD-SDI standards?
Yes, LMH0344GRE/NOPB supports ST 259 (SD-SDI, 270 Mbps), ST 292 (HD-SDI, 1.485 Gbps), ST 344 (dual-link HD-SDI), and ST 424 (3G-SDI, 2.97 Gbps) standards. Its 125 Mbps–2.97 Gbps data rate range and SMPTE-compliant jitter/return loss performance ensure interoperability across all major broadcast video formats. LMH0344GRE/NOPB automatically adapts without mode selection.
How does the MUTEREF pin affect LMH0344GRE/NOPB operation?
The MUTEREF pin sets the carrier detect (CD) threshold: grounding it enables maximum equalization distance before muting; applying >1.3 V reduces allowable cable length before CD asserts and triggers mute. This allows field-tuning of mute sensitivity for specific installation requirements. LMH0344GRE/NOPB uses MUTEREF to balance signal reliability against false mute events in marginal link conditions.
Can LMH0344GRE/NOPB accept single-ended input signals?
Yes, LMH0344GRE/NOPB supports both differential and single-ended AC-coupled inputs. The SDI/SDI pins function as true/complement differential inputs, but a single-ended signal may be applied to SDI with SDI grounded or terminated - provided common-mode voltage remains within 1.9 V and input swing stays 720–950 mVP–P. LMH0344GRE/NOPB's internal biasing accommodates this configuration without external components.
What package options are available for LMH0344GRE/NOPB?
LMH0344GRE/NOPB is offered exclusively in the 4.00 mm × 4.00 mm, 16-pin WQFN (RUM) package with exposed die attach pad. This RoHS-compliant, leadless package provides excellent thermal performance and matches the footprint of LMH0044, LMH0384, and LMH0074 for design reuse. LMH0344GRE/NOPB does not have a CS-BGA variant in the NOPB orderable version.
LMH0344GRE/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
LMH0344GRE/NOPB FAQ
1.How can I place an order for LMH0344GRE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH0344GRE/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 LMH0344GRE/NOPB reliable?
The price and inventory of LMH0344GRE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH0344GRE/NOPB is usually 5 days.
3.What payment methods are accepted for LMH0344GRE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH0344GRE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH0344GRE/NOPB?
LMH0344GRE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH0344GRE/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 LMH0344GRE/NOPB?
For technical support, including LMH0344GRE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH0344GRE/NOPB requirements.
6.How does Aetrix verify that LMH0344GRE/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH0344GRE/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 LMH0344GRE/NOPB meets industry standards.
7.What is the process for return or replacement of LMH0344GRE/NOPB?
All LMH0344GRE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH0344GRE/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 LMH0344GRE/NOPB part is unused and in its original packaging.
Return procedure for LMH0344GRE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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