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Texas Instruments LMH0044SQE/NOPB
- Part No.:
- LMH0044SQE/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
LMH0044SQE/NOPB.pdf
- Description:
- IC INTERFACE SPECIALIZED 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:104
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Product details
Overview
LMH0044SQE/NOPB from Texas Instruments is an SMPTE 292M/259M adaptive 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 coax at 1.485 Gbps, with 50Ω differential outputs and single 3.3V supply operation - deployed in broadcast-grade SDI receivers.
For engineers reviewing the LMH0044SQE/NOPB datasheet, LMH0044SQE/NOPB pinout, LMH0044SQE/NOPB application, or LMH0044SQE/NOPB equivalent, key selection criteria include adaptive equalization range, carrier detect/mute control behavior, DC restoration capability, and WQFN-16 thermal performance under sustained high-speed video loading.
Technical Context
The LMH0044SQE/NOPB implements a multi-stage adaptive filter controlled by an external 1µF AEC capacitor across AEC+ and AEC−, enabling real-time compensation for dispersive loss in coaxial media. Its DC restoration block self-biases input signals to handle pathological SMPTE RP-178/RP-198 video patterns without external biasing.
Carrier detection uses energy-based signal presence sensing referenced to MUTEREF voltage, while output mute is independently controllable via MUTE pin or auto-triggered by CD tied to MUTE. The equalizer operates only when BYPASS = low; in BYPASS mode, both equalization and DC restoration are disabled.
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) compliant systems. |
| Equalization Capacity | Up to 200 m Belden 1694A at 1.485 Gbps - enables long-haul HD-SDI link extension without repeaters. |
| Output Swing | 750 mVP–P differential into 50Ω - meets SMPTE 292M output amplitude requirements for downstream reclocking. |
| Supply Voltage | 3.3 V ±5% - single-rail operation simplifies power design in broadcast equipment with tight voltage margins. |
| Power Consumption | 63–77 mA typical - decreases with increasing cable length, optimizing thermal load in dense SDI router cards. |
| Input Return Loss | 15–20 dB (5 MHz–1.5 GHz) - ensures minimal reflection-induced jitter on AC-coupled SDI inputs. |
| Jitter Tolerance | ≤0.3 UI at 200 m Belden 1694A, 1.485 Gbps - maintains eye integrity for reliable CDR lock in receiver ASICs. |
Pinout & Package
The LMH0044SQE/NOPB is housed in a 4 mm × 4 mm, 16-pin WQFN package (RUM0016A) with exposed thermal pad connected to VEE. Package height is ≤0.8 mm, and MSL rating is Level-1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDI / SDI | Differential serial data input | Accepts AC-coupled SMPTE-compliant differential input; supports single-ended interface with proper termination. |
| SDO / SDO | Differential serial data output | 50Ω internally terminated; delivers 750 mVP–P differential swing for direct connection to CDR or FPGA transceivers. |
| AEC+ / AEC− | Adaptive equalization loop filter | Connects external 1 µF capacitor to set AEC bandwidth and convergence speed for varying cable lengths. |
| MUTEREF | Mute threshold reference | DC voltage (0.7–1.3 V) sets cable-length-dependent muting point; floating for maximum equalization range. |
| CD / MUTE | Carrier detect and output mute control | CD asserts high when no valid signal present; MUTE forces outputs low when high, or enables when low - tied together for auto-muting. |
| BYPASS | Equalization disable control | High disables both equalization and DC restoration - used for test mode or short-cable bypass paths. |
| VCC / VEE | Power supply rails | Two 3.3V supply pins and four ground pins minimize IR drop and improve PSRR in high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive equalization architecture | Multi-stage filter dynamically adjusts gain/bandwidth using external 1 µF AEC capacitor - eliminates manual tuning across cable lengths. |
| Integrated DC restoration | Self-biasing circuit restores baseline for pathological SMPTE video patterns (e.g., color bars), ensuring stable CDR lock without external clamping. |
| Programmable carrier detect mute | MUTEREF voltage sets precise cable-length threshold for automatic output muting - prevents noise propagation during signal loss. |
| Footprint compatibility with GS1574A | Pin-to-pin and layout-compatible replacement for Gennum GS1574A - enables drop-in upgrade in legacy SDI hardware without PCB revision. |
| Low-jitter output driver | 100–220 ps rise/fall time with <15 ps mismatch - preserves eye opening for downstream clock-data recovery at 1.485 Gbps. |
Applications
| Broadcast HD-SDI Receiver | Professional Video Router |
|---|---|
Use Scenario: Receiving 1080p60 HD-SDI signals over 150 m Belden 1694A coax in OB van infrastructure. IC Role / Device Role / Timing Role: Adaptive equalizer restoring signal integrity prior to CDR and video processing ASIC. Use Value: Enables error-free reception at 1.485 Gbps without external amplification or retiming, reducing system latency and component count. | Use Scenario: Input stage of 32×32 SDI routing switch handling mixed SD/HD/3G-SDI sources. IC Role / Device Role / Timing Role: Front-end equalizer standardizing signal amplitude and jitter across diverse cable lengths and source types. Use Value: Maintains consistent eye margin across all inputs, allowing unified CDR configuration and simplifying firmware calibration. |
| Medical Imaging Endoscopy System | Studio Camera Control Unit |
Use Scenario: Transmitting uncompressed 4K UHD video from endoscopic camera head to processor over 10 m coax. IC Role / Device Role / Timing Role: Short-cable equalizer compensating for connector and PCB trace loss while preserving low jitter. Use Value: Delivers clean 2.97 Gbps (SMPTE 424M) signal to FPGA transceiver with <0.2 UI jitter - critical for artifact-free surgical visualization. | Use Scenario: Embedded SDI receiver in camera control unit managing return video feed from remote camera head. IC Role / Device Role / Timing Role: Adaptive equalizer with carrier detect enabling automatic failover to backup feed upon signal loss. Use Value: CD/MUTE integration provides seamless mute activation within <100 µs - avoids visible black flash during source switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adaptive SDI equalizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH0046SQ/NOPB | Supports SMPTE 424M (2.97 Gbps); higher max data rate but identical pinout and AEC architecture. | Required for 3G-SDI and UHD-SDI links; not backward compatible with 1.485 Gbps-only designs due to different internal bandwidth settings. | Select LMH0046SQ/NOPB only when 3G-SDI support is mandatory; LMH0044SQE/NOPB remains optimal for cost-sensitive HD-SDI systems. |
| GS1574A | Legacy Gennum part; same footprint and function but lacks programmable MUTEREF and has fixed mute threshold. | Used in older broadcast gear; requires board-level redesign to enable adjustable muting or improved jitter performance. | LMH0044SQE/NOPB is a direct drop-in replacement per TI documentation, offering enhanced flexibility without layout change. |
Compared with LMH0046SQ/NOPB, the LMH0044SQE/NOPB trades 3G-SDI capability for lower power and proven stability in HD-SDI infrastructure; versus GS1574A, it adds MUTEREF programmability and tighter jitter control - making it the preferred upgrade path for field-deployed equipment requiring extended cable reach and intelligent mute behavior.
Availability
LMH0044SQE/NOPB is available at Aetrix Electronics and suitable for broadcast infrastructure, professional video routing, and medical imaging systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for LMH0044SQE/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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and industrial-grade performance.
The LMH0044SQE/NOPB belongs to TI's high-speed interface product line, engineered specifically for SMPTE-compliant serial digital video equalization in broadcast, medical, and pro-AV equipment where signal fidelity and cable reach are critical.
FAQ
What is the maximum cable length the LMH0044SQE/NOPB can equalize at 1.485 Gbps?
The LMH0044SQE/NOPB equalizes up to 200 meters of Belden 1694A coaxial cable at 1.485 Gbps, as verified in TI's SNLS216E datasheet Figure 2 and AC Electrical Characteristics table. Performance depends on cable quality and ambient temperature; actual reach may vary slightly with installation conditions such as connector losses or ambient EMI.
Does the LMH0044SQE/NOPB require external passive components for basic operation?
Yes, the LMH0044SQE/NOPB requires two external 1.0 µF capacitors: one between AEC+ and AEC− for adaptive loop control, and one for AC coupling at the SDI inputs. Additional 4.7 pF capacitors on MUTEREF and BYPASS are recommended per TI's layout guidelines to suppress noise and ensure stable mute behavior.
Can the LMH0044SQE/NOPB operate with single-ended input signals?
Yes, the LMH0044SQE/NOPB accepts single-ended inputs when properly terminated, though differential input is preferred for noise immunity. Input must be AC-coupled; transformer coupling is not supported. Single-ended operation maintains full data rate support (125 Mbps–1.485 Gbps) and equalization capability per TI's Input Interfacing section.
How does the MUTEREF pin affect carrier detect behavior in the LMH0044SQE/NOPB?
The MUTEREF pin sets the DC threshold for the carrier detect (CD) circuit: a higher MUTEREF voltage reduces the allowable cable length before CD de-asserts and triggers mute. When MUTEREF is left unconnected, the LMH0044SQE/NOPB defaults to maximum equalization range before muting - a key feature for variable-length installations.
Is the LMH0044SQE/NOPB pin-compatible with the Gennum GS1574A?
Yes, the LMH0044SQE/NOPB is footprint-compatible with the Gennum GS1574A per TI's "Replacing the Gennum GS1574A" section. It offers identical pinout, package (WQFN-16), and core functionality, with added features including programmable MUTEREF and improved jitter performance - enabling direct replacement without PCB modification.
LMH0044SQE/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
LMH0044SQE/NOPB FAQ
1.How can I place an order for LMH0044SQE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH0044SQE/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 LMH0044SQE/NOPB reliable?
The price and inventory of LMH0044SQE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH0044SQE/NOPB is usually 5 days.
3.What payment methods are accepted for LMH0044SQE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH0044SQE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH0044SQE/NOPB?
LMH0044SQE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH0044SQE/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 LMH0044SQE/NOPB?
For technical support, including LMH0044SQE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH0044SQE/NOPB requirements.
6.How does Aetrix verify that LMH0044SQE/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH0044SQE/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 LMH0044SQE/NOPB meets industry standards.
7.What is the process for return or replacement of LMH0044SQE/NOPB?
All LMH0044SQE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH0044SQE/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 LMH0044SQE/NOPB part is unused and in its original packaging.
Return procedure for LMH0044SQE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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