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Texas Instruments LMH0044SQX/NOPB
- Part No.:
- LMH0044SQX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
LMH0044SQX/NOPB.pdf
- Description:
- IC INTERFACE SPECIALIZED 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,807
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Product details
Overview
LMH0044SQX/NOPB from Texas Instruments is an SMPTE 292M/259M adaptive coaxial cable equalizer IC for serial digital video interfaces, supporting data rates from 125 Mbps to 1.485 Gbps, equalizing up to 200 m of Belden 1694A at 1.485 Gbps, and operating from a single 3.3 V supply with 208 mW typical power consumption.
For engineers reviewing the LMH0044SQX/NOPB datasheet, LMH0044SQX/NOPB pinout, LMH0044SQX/NOPB application, or LMH0044SQX/NOPB equivalent, this device delivers adaptive equalization, DC restoration, carrier detect, programmable output mute, and differential 50 Ω outputs - critical for broadcast-grade SDI receiver design and signal integrity validation.
Technical Context
The LMH0044SQX/NOPB implements a multi-stage adaptive filter controlled by an external 1 µF AEC capacitor across AEC+ and AEC−, enabling real-time compensation for dispersive loss in coaxial media. Its DC restoration block handles pathological SMPTE RP-178/RP-198 video patterns without requiring external biasing.
Carrier detection operates independently of equalization state but is disabled in BYPASS mode; MUTE and CD pins support automatic muting when no valid signal is present. The device accepts both differential and AC-coupled single-ended inputs and drives 50 Ω differential outputs with 750 mVP–P swing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate Range | 125 Mbps to 1.485 Gbps - supports SMPTE 259M (270 Mbps), 292M (1.485 Gbps), and 344M (2.97 Gbps) via rate-compatible operation. |
| Cable Equalization | Up to 200 m Belden 1694A at 1.485 Gbps - enables long-haul HD-SDI link extension without repeaters. |
| Supply Voltage | 3.3 V ±5% - single-rail operation simplifies power delivery in broadcast equipment and camera backends. |
| Output Swing | 750 mVP–P differential into 50 Ω - meets SMPTE 292M output amplitude requirements for downstream reclocking. |
| Power Consumption | 63–77 mA ICC (208 mW typ at 3.3 V) - decreases with increasing cable length, optimizing thermal design in dense PCB layouts. |
| Input Return Loss | 15–20 dB (5 MHz–1.5 GHz) - ensures minimal reflection-induced jitter on SDI input traces. |
| Jitter Tolerance | ≤0.3 UI at 200 m Belden 1694A, 1.485 Gbps - preserves eye opening for reliable CDR lock in receivers. |
Pinout & Package
LMH0044SQX/NOPB is housed in a 4 mm × 4 mm, 16-pin WQFN package (RUM0016A) with exposed thermal pad connected to VEE. The package supports fine-pitch PCB layout and requires soldering the thermal pad for thermal and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 9, 12 | VEE | Negative supply (ground); four dedicated pins reduce ground impedance and improve noise immunity. |
| 2, 3 | SDI / SDI | Differential serial data input - accepts AC-coupled true/complement signals per SMPTE standards. |
| 5, 6 | AEC+ / AEC− | Loop filter connections for adaptive control; require 1 µF capacitor to set equalizer convergence time. |
| 7 | BYPASS | Active-high disable of equalization and DC restoration - used for test mode or legacy signal paths. |
| 8 | MUTEREF | Adjustable threshold reference for carrier detect and automatic mute - voltage inversely scales max equalized cable length. |
| 10, 11 | SDO / SDO | Differential serial data output - internally terminated to 50 Ω, delivering 750 mVP–P swing. |
| 13, 16 | VCC | +3.3 V supply - dual pins lower IR drop and improve PSRR at high-frequency data rates. |
| 14 | MUTE | Active-high output muting control - forces SDO/SDO low when tied to VCC; disabled in BYPASS mode. |
| 15 | CD | Carrier detect open-drain output - high = no valid input signal; used with MUTE for auto-muting. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Equalization | Real-time gain/bandwidth adjustment via AEC loop - compensates for varying cable loss without manual tuning. |
| DC Restoration | Self-biasing circuit restores baseline for pathological video patterns - eliminates baseline wander in SMPTE-compliant links. |
| Programmable Mute Threshold | MUTEREF pin sets cable-length-dependent muting point - enables precise fail-safe behavior in field-deployed equipment. |
| Dual Input Mode Support | Accepts differential or AC-coupled single-ended inputs - simplifies integration with legacy or transformerless front-ends. |
| Carrier Detect + Mute Coordination | CD and MUTE pins can be wired together - provides automatic output blanking during cable disconnect or source failure. |
Applications
| HD-SDI Camera Interface | Studio Router Input Stage |
|---|---|
|
Use Scenario: Receives uncompressed 1080p60 video over 150 m Belden 1694A coax from a broadcast camera head. IC Role / Device Role / Timing Role: Adaptive equalizer and DC restorer restoring signal integrity before CDR and demultiplexing. Use Value: Maintains <0.25 UI jitter at 1.485 Gbps, enabling robust clock recovery and eliminating frame sync errors. |
Use Scenario: Front-end conditioning for 32×32 SDI routing switcher accepting mixed-rate signals (270 Mbps to 1.485 Gbps). IC Role / Device Role / Timing Role: Rate-transparent equalizer ensuring consistent signal amplitude and eye opening across all inputs. Use Value: Eliminates manual gain switching; supports hot-plug detection via CD/MUTE coordination across all ports. |
| Medical Endoscopy Video Processor | Outside Broadcast (OB) Truck Reclocker |
|
Use Scenario: Processes HD-SDI from rigid endoscopes over 30 m coax inside sterile environments with strict EMI limits. IC Role / Device Role / Timing Role: Low-power equalizer with 208 mW typical dissipation and 8 kV HBM ESD protection. Use Value: Enables compact, fanless enclosure design while meeting IEC 60601-1 EMC immunity requirements. |
Use Scenario: Reconditions degraded SDI signals from remote cameras before distribution to recording and monitoring systems. IC Role / Device Role / Timing Role: Jitter-reducing equalizer feeding low-jitter clock cleaners and retimers. Use Value: Reduces accumulated jitter to <0.2 UI after 200 m, preventing buffer underflow in downstream IP encapsulation stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adaptive SDI equalizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GS1574A | Footprint-compatible Gennum part; lacks integrated DC restoration and programmable MUTEREF. | Requires external DC restore circuitry and fixed-threshold muting; higher BOM count and board area. | Select GS1574A only if maintaining legacy Gennum-based designs with no DC restoration requirement. |
| LMH0046SQ/NOPB | Texas Instruments pin-compatible upgrade with extended 2.97 Gbps support and improved jitter performance (<0.15 UI). | Supports 3G-SDI (SMPTE 424M) and dual-link HD-SDI; higher power (240 mW) and tighter layout constraints. | Choose LMH0046SQ/NOPB for new 3G-SDI designs or where future-proofing beyond 1.485 Gbps is required. |
Compared with GS1574A, LMH0044SQX/NOPB integrates DC restoration and programmable muting, reducing external components; versus LMH0046SQ/NOPB, it trades 3G-SDI capability for lower power and proven stability in established HD-SDI infrastructure.
Availability
LMH0044SQX/NOPB is available at Aetrix Electronics and suitable for broadcast equipment manufacturing, medical imaging systems, and professional video production gear requiring stable component supply and long-term obsolescence management.
Supply support for LMH0044SQX/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 video interface solutions.
The LMH0044SQX/NOPB belongs to TI's LMH high-speed video interface product line, designed specifically for SMPTE-compliant serial digital video equalization, DC restoration, and signal integrity recovery in professional AV infrastructure.
FAQ
What is the maximum cable length LMH0044SQX/NOPB can equalize at 1.485 Gbps?
The LMH0044SQX/NOPB equalizes up to 200 meters of Belden 1694A coaxial cable at 1.485 Gbps while maintaining ≤0.25 UI jitter, as verified per SMPTE 292M compliance testing. Performance depends on cable quality and environmental conditions; actual reach may vary with Belden 8281 or other RG-6 variants.
Does LMH0044SQX/NOPB support DVB-ASI applications?
Yes, LMH0044SQX/NOPB supports DVB-ASI at 270 Mbps, as explicitly stated in its official features list. It equalizes up to 400 meters of Belden 1694A at this rate and maintains signal integrity compatible with ASI receiver front-ends requiring 75 Ω termination and low jitter.
How does the MUTEREF pin affect LMH0044SQX/NOPB operation?
The MUTEREF pin sets the threshold voltage for carrier detect (CD) assertion and automatic output muting. A higher MUTEREF voltage reduces the maximum cable length before muting; leaving it unconnected enables maximum equalization range. It directly controls the sensitivity of the energy-detect circuit driving CD and MUTE.
Is LMH0044SQX/NOPB pin-compatible with the Gennum GS1574A?
Yes, LMH0044SQX/NOPB is footprint-compatible with the GS1574A per TI's application note, sharing identical 16-pin WQFN (RUM) layout and pin functions. However, LMH0044SQX/NOPB adds integrated DC restoration and programmable muting not present in the GS1574A, requiring minor schematic updates.
What thermal considerations apply to LMH0044SQX/NOPB's exposed pad?
The exposed thermal pad of LMH0044SQX/NOPB must be soldered to a VEE-connected copper plane for effective heat dissipation and mechanical stability. TI specifies θJA = 43°C/W and θJC = 9°C/W - omitting pad connection risks junction temperature exceeding 150°C under sustained 1.485 Gbps operation.
LMH0044SQX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Data Transport
- Interface:
- Serial
- Voltage - Supply:
- 3.135V ~ 3.465V
- Supplier Device Package:
- 16-WQFN (4x4)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
LMH0044SQX/NOPB FAQ
1.How can I place an order for LMH0044SQX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH0044SQX/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 LMH0044SQX/NOPB reliable?
The price and inventory of LMH0044SQX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH0044SQX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH0044SQX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH0044SQX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH0044SQX/NOPB?
LMH0044SQX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH0044SQX/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 LMH0044SQX/NOPB?
For technical support, including LMH0044SQX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH0044SQX/NOPB requirements.
6.How does Aetrix verify that LMH0044SQX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH0044SQX/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 LMH0044SQX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH0044SQX/NOPB?
All LMH0044SQX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH0044SQX/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 LMH0044SQX/NOPB part is unused and in its original packaging.
Return procedure for LMH0044SQX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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