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Texas Instruments LMH0344SQE/NOPB
- Part No.:
- LMH0344SQE/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
LMH0344SQE/NOPB.pdf
- Description:
- IC INTERFACE SPECIALIZED 16LLP
- Quantity:
- Payment:
- Shipping:
Inventory:554
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Product details
Overview
LMH0344SQE/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 (3G), ST 292 (HD), ST 344 (dual-link HD), 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 functionality - deployed in broadcast camera backends and video routing switchers.
For engineers reviewing the LMH0344SQE/NOPB datasheet, LMH0344SQE/NOPB pinout, LMH0344SQE/NOPB application, or LMH0344SQE/NOPB equivalent, key selection criteria include its adaptive equalization bandwidth, 3.3-V single-supply operation, WQFN-16 package compatibility with LMH0044/LMH0384, input return loss performance (≥10 dB up to 3 GHz), and support for pathological video patterns per SMPTE RP 178/RP 198.
Technical Context
The LMH0344SQE/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 self-biases differential inputs to handle long strings of identical bits, and the carrier detect/mute logic uses MUTEREF voltage (0.6–1.3 V range) to set cable-length-dependent muting thresholds.
It accepts AC-coupled single-ended or differential SDI inputs, drives 50-Ω differential outputs delivering 750 mVP–P, and operates exclusively in pin-controlled functional modes - no I²C or SPI interface. The BYPASS pin disables both equalization and DC restoration, while CD and MUTE pins provide LVCMOS-level status and control signals compliant with broadcast system timing requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate Range | 125 Mbps to 2.97 Gbps - covers full SMPTE SD/HD/3G-SDI hierarchy including ST 259, ST 292, ST 344, and ST 424. |
| Max Equalized Cable | 120 m Belden 1694A at 2.97 Gbps - enables direct connection from camera head to base station without repeaters. |
| Output Jitter | ≤0.3 UI at 2.97 Gbps - meets SMPTE RP 184 jitter compliance for broadcast-grade signal integrity. |
| Input Return Loss | ≥10 dB from 1.5–3.0 GHz - ensures minimal reflection at 3G-SDI frequencies, critical for eye diagram opening. |
| Supply & Power | 3.3 V ±3.5%, 100 mA typical - compatible with standard broadcast board power rails; 280-mW dissipation enables compact thermal design. |
| ESD Rating | HBM ±8 kV - robust handling in production and field service environments per IEC 61000-4-2 Level 4. |
| Operating Temp | −40°C to +85°C - qualified for industrial and broadcast equipment enclosures without forced cooling. |
Pinout & Package
LMH0344SQE/NOPB is packaged in a 4.0 mm × 4.0 mm, 16-pin WQFN (RUM) with exposed die attach pad (DAP) connected to VEE. Pin functions are electrically validated per TI SNLS233O Rev O datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDI / SDI | Differential analog input | Accepts AC-coupled SDI data (true/complement); supports single-ended mode with internal termination. |
| SDO / SDO | Differential analog output | 50-Ω internally terminated; delivers 750 mVP–P differential swing into 100-Ω load. |
| AEC+ / AEC− | Analog loop filter nodes | Connect external 1-µF capacitor to set adaptive equalizer convergence speed and stability. |
| MUTEREF | Analog reference input | 0.6–1.3 V setting determines cable-length threshold before CD asserts and mutes output. |
| CD | LVCMOS carrier detect output | High = no valid signal; used with MUTE to auto-disable output during loss-of-signal events. |
| MUTE | LVCMOS output control input | High = force SDO/SDO to logic zero; low = enable output; tied to CD for automatic mute. |
| BYPASS | LVCMOS functional disable | High = bypasses equalizer and DC restoration; requires external pulldown if unused. |
| VCC / VEE | Power supply terminals | VCC = +3.3 V; VEE = ground; DAP must be soldered to PCB ground plane for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Equalization | Real-time compensation across 125 Mbps–2.97 Gbps using external AEC capacitor; no firmware or configuration required. |
| DC Restoration | Self-biasing circuit maintains baseline stability on pathological video patterns (e.g., SMPTE RP 198), preventing eye closure. |
| Programmable Muting | MUTEREF voltage sets precise cable-length-based muting point - eliminates false triggers in marginal link conditions. |
| Input Flexibility | Accepts either differential or single-ended AC-coupled SDI inputs; no transformer coupling needed. |
| Output Drive | 50-Ω internal termination delivers clean 750 mVP–P differential output directly to FPGA or reclocker inputs. |
Applications
| Broadcast Camera Interface | Video Routing Switcher |
|---|---|
|
Use Scenario: High-resolution video signal transmission from 4K camera head to base station over 100+ m coaxial cable. IC Role / Device Role / Timing Role: Adaptive equalizer restoring high-frequency content lost in long cable runs; provides carrier detect for fail-safe black burst insertion. Use Value: Enables 2.97 Gbps operation over Belden 1694A up to 120 m without repeaters, reducing system latency and component count. |
Use Scenario: Centralized routing of mixed SD/HD/3G-SDI feeds in broadcast control rooms with variable cable lengths. IC Role / Device Role / Timing Role: Input equalizer stage normalizing signal integrity across diverse source distances prior to crosspoint switching. Use Value: Maintains ≥10 dB input return loss up to 3 GHz, preserving SMPTE-compliant eye diagrams across all routed paths. |
| Medical Imaging Endoscopy | Professional Video Recorder |
|
Use Scenario: Real-time HD video transmission from minimally invasive endoscopic probe through flexible coaxial tether. IC Role / Device Role / Timing Role: Cable equalizer compensating frequency-dependent attenuation in constrained medical cabling; DC restoration prevents baseline wander on static tissue images. Use Value: Supports 1.485 Gbps HD-SDI over 140 m Belden 1694A with ≤0.08 UI jitter - meets FDA-required deterministic latency. |
Use Scenario: Ingest path for uncompressed 3G-SDI feeds into solid-state video recorders with embedded FPGA processing. IC Role / Device Role / Timing Role: Front-end equalizer driving FPGA transceivers; BYPASS pin allows hardware-selectable pass-through for diagnostics. Use Value: WQFN-16 footprint matches LMH0044/LMH0384 - enables drop-in upgrade path from HD to 3G-SDI recorder designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SDI equalizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH0384SQE/NOPB | Same 3G-SDI equalizer architecture but optimized for lower power (75 mA vs. 100 mA) and higher sensitivity at 270 Mbps. | Limited to ≤100 m at 2.97 Gbps; lacks programmable MUTEREF - fixed mute threshold only. | Select when power budget is constrained and cable length ≤100 m; not suitable for variable-length installations requiring fine muting control. |
| GS2974B-INE3 | Pin-compatible Semtech device with identical 16-pin WQFN; supports same SMPTE standards but uses different AEC topology (no external capacitor). | No MUTEREF pin - mute threshold fixed; HBM ESD rating lower (±4 kV vs. ±8 kV). | Valid alternative where existing GS2974A/B layout exists; requires validation of jitter performance (0.35 UI max) and return loss at 3 GHz. |
Compared with LMH0344SQE/NOPB, LMH0384SQE/NOPB trades muting flexibility and 3G reach for lower power, while GS2974B-INE3 offers layout compatibility but sacrifices ESD robustness and programmable muting - making LMH0344SQE/NOPB optimal for new broadcast infrastructure demanding field-reconfigurable cable-length tolerance.
Availability
LMH0344SQE/NOPB is available at Aetrix Electronics and suitable for broadcast equipment manufacturing, professional video routing systems, and medical imaging device integration requiring stable component supply across extended product lifecycles.
Supply support for LMH0344SQE/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 deep expertise in high-speed interface solutions for video, communications, and industrial markets.
The LMH0344SQE/NOPB belongs to TI's LMH family of SDI equalizers and retimers, engineered specifically for SMPTE-compliant broadcast video infrastructure - emphasizing signal integrity, cable adaptability, and robust operation in mission-critical timing environments.
FAQ
What is the maximum cable length LMH0344SQE/NOPB can equalize at 2.97 Gbps?
The LMH0344SQE/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 return loss requirements. This specification is verified per TI SNLS233O Rev O test conditions using PRBS10 and pseudo-matrix pathological signals.
Does LMH0344SQE/NOPB require external configuration or firmware?
No, LMH0344SQE/NOPB operates in pin-controlled mode only - no I²C, SPI, or firmware loading is needed. Adaptive equalization, DC restoration, and muting are managed entirely by analog control pins (AEC+, AEC−, MUTEREF) and LVCMOS logic inputs (BYPASS, MUTE), enabling immediate plug-and-play deployment.
Can LMH0344SQE/NOPB accept single-ended SDI inputs?
Yes, LMH0344SQE/NOPB supports both differential and single-ended AC-coupled SDI inputs. When used in single-ended mode, the device internally terminates the complement input, and the input common-mode voltage must remain within 1.9 V minimum per datasheet Section 6.5.
What is the purpose of the MUTEREF pin on LMH0344SQE/NOPB?
The MUTEREF pin on LMH0344SQE/NOPB sets the voltage threshold that determines how much cable loss the device tolerates before asserting carrier detect (CD) and muting outputs. Applying 0 V (ground) enables maximum equalization length; increasing MUTEREF voltage reduces allowable cable length - allowing precise field tuning without hardware changes.
Is LMH0344SQE/NOPB pin-compatible with other TI SDI equalizers?
Yes, the LMH0344SQE/NOPB WQFN-16 package (RUM) has footprint compatibility with LMH0044, LMH0384, and LMH0074 per TI documentation - enabling mechanical reuse in multi-standard SDI designs. However, pin functions differ (e.g., MUTEREF is unique to LMH0344SQE/NOPB), so schematic review is required before substitution.
LMH0344SQE/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Data Transport
- Interface:
- Serial
- Voltage - Supply:
- 3.135V ~ 3.465V
- Supplier Device Package:
- 16-WQFN (4x4)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
LMH0344SQE/NOPB FAQ
1.How can I place an order for LMH0344SQE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH0344SQE/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 LMH0344SQE/NOPB reliable?
The price and inventory of LMH0344SQE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH0344SQE/NOPB is usually 5 days.
3.What payment methods are accepted for LMH0344SQE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH0344SQE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH0344SQE/NOPB?
LMH0344SQE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH0344SQE/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 LMH0344SQE/NOPB?
For technical support, including LMH0344SQE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH0344SQE/NOPB requirements.
6.How does Aetrix verify that LMH0344SQE/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH0344SQE/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 LMH0344SQE/NOPB meets industry standards.
7.What is the process for return or replacement of LMH0344SQE/NOPB?
All LMH0344SQE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH0344SQE/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 LMH0344SQE/NOPB part is unused and in its original packaging.
Return procedure for LMH0344SQE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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