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Texas Instruments LMH0074SQE/NOPB
- Part No.:
- LMH0074SQE/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
LMH0074SQE/NOPB.pdf
- Description:
- IC INTERFACE SPECIALIZED 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:320
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Product details
Overview
LMH0074SQE/NOPB from Texas Instruments is an SMPTE 259M/344M-compliant adaptive cable equalizer for serial digital video interfaces, supporting data rates from 125 Mbps to 540 Mbps, equalizing up to 400 m of Belden 1694A coaxial cable at 270 Mbps, and operating from a single 3.3 V supply with −40°C to +85°C industrial temperature range.
For engineers reviewing the LMH0074SQE/NOPB datasheet, LMH0074SQE/NOPB pinout, LMH0074SQE/NOPB application, or LMH0074SQE/NOPB equivalent, this device is selected for SDI signal integrity restoration in broadcast infrastructure where adaptive equalization, carrier detect, and programmable mute threshold are required under real-world cable loss conditions.
Technical Context
The LMH0074SQE/NOPB implements a multi-stage adaptive filter controlled by an external 1 µF AEC capacitor across AEC+ and AEC− pins, enabling automatic gain and bandwidth adjustment based on input signal degradation. Its DC restoration block fully restores signal baseline for pathological SMPTE RP-178 test patterns.
It features dual differential inputs (SDI/SDI) and 50 Ω differential outputs (SDO/SDO), with independent carrier detect (CD) and output mute (MUTE) logic tied to MUTEREF voltage for configurable muting thresholds. BYPASS mode disables both equalization and DC restoration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate Range | 125 Mbps to 540 Mbps - supports SMPTE 259M (270 Mbps) and SMPTE 344M (540 Mbps) standards without reconfiguration. |
| Cable Equalization | Up to 400 m Belden 1694A at 270 Mbps - enables long-haul SDI transmission over standard 75 Ω coax with <0.2 UI jitter. |
| Supply Voltage | 3.3 V ±5% - single-rail operation compatible with modern broadcast system power domains. |
| Output Swing | 750 mVP–P differential into 50 Ω - meets SMPTE output amplitude requirements for downstream reclocking. |
| Input Return Loss | 15–20 dB (5 MHz to 1.5 GHz) - ensures minimal reflection on AC-coupled SDI traces when used with proper board layout. |
| Power Consumption | 63–77 mA typical - decreases with increasing cable length, optimizing thermal design in dense video routing cards. |
| Operating Temperature | −40°C to +85°C - qualified for industrial broadcast encoders, routers, and camera interface modules. |
Pinout & Package
LMH0074SQE/NOPB uses a 16-pin WQFN package (RUM0016A) with 4 mm × 4 mm body, 0.65 mm pitch, and exposed thermal pad soldered to PCB ground for thermal and mechanical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 9, 12 | VEE | Negative supply (ground) - four dedicated ground pins minimize ground bounce in high-speed SDI operation. |
| 2, 3 | SDI / SDI | Differential serial data input - accepts AC-coupled true/complement signals; supports single-ended input with internal termination. |
| 5, 6 | AEC+ / AEC− | Adaptive equalization loop filter connection - requires 1 µF capacitor to set loop dynamics and convergence behavior. |
| 7 | BYPASS | Active-high disable control - bypasses equalization and DC restoration, passing raw input directly to outputs. |
| 8 | MUTEREF | Mute reference voltage input - sets CD threshold; floating for maximum equalization length, or biased to reduce muting delay. |
| 10, 11 | SDO / SDO | Differential serial data output - internally terminated to 50 Ω, delivering 750 mVP–P swing into 50 Ω loads. |
| 13, 16 | VCC | Positive supply (+3.3 V) - two dedicated power pins reduce supply impedance and improve PSRR. |
| 14 | MUTE | Output mute control - low = active output, high = muted; functional only when not in BYPASS mode. |
| 15 | CD | Carrier detect open-drain output - high = no valid signal detected, low = signal present; used with MUTE for auto-muting. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive equalization with external AEC capacitor | Enables dynamic compensation of varying cable loss profiles without firmware or host intervention. |
| DC restoration for pathological data patterns | Guarantees baseline stability on SMPTE RP-178 color bar and other low-D.C. video sequences. |
| Programmable mute threshold via MUTEREF | Allows precise trade-off between equalization depth and false mute events in marginal-signal environments. |
| Carrier detect with open-drain CD output | Provides reliable signal presence indication for system-level status monitoring and fail-safe routing. |
| Footprint compatibility with LMH0044 and GS9074A | Enables drop-in replacement or design reuse in existing SDI equalizer layouts without PCB revision. |
Applications
| Broadcast Camera Interface | SDI Distribution Router |
|---|---|
|
Use Scenario: High-resolution video capture from studio cameras over long coaxial runs to production switchers. IC Role / Device Role / Timing Role: Adaptive equalizer restoring signal integrity at receiver input before reclocking and decoding. Use Value: Enables use of cost-effective Belden 1694A cable up to 400 m without repeaters while maintaining SMPTE 259M compliance. |
Use Scenario: Centralized routing of multiple SDI streams in broadcast facilities with variable cable lengths per port. IC Role / Device Role / Timing Role: Input-stage equalizer compensating for insertion loss differences across diverse patch panel configurations. Use Value: Eliminates manual per-port gain tuning; adapts automatically to cable length changes during reconfiguration. |
| Medical Imaging Video Link | Industrial Machine Vision System |
|
Use Scenario: Transmission of uncompressed HD video from endoscopic cameras through sterilizable flexible cables. IC Role / Device Role / Timing Role: Signal conditioner ensuring jitter <0.2 UI at 270 Mbps for error-free frame capture in diagnostic displays. Use Value: Maintains pixel-perfect fidelity over 280 m of Belden 8281 cable, critical for surgical decision support. |
Use Scenario: Robust video acquisition from high-speed inspection cameras in factory automation cells. IC Role / Device Role / Timing Role: Cable loss compensator enabling reliable 540 Mbps SMPTE 344M transmission over industrial plant wiring. Use Value: Supports 1080p60 machine vision feeds over legacy coax infrastructure without fiber upgrade costs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adaptive SDI equalizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH0044SQ/NOPB | Fixed-gain equalizer (no AEC loop); supports 143–360 Mbps; lacks MUTEREF and CD pins. | Suitable for fixed-length cable installations where adaptive response is unnecessary. | Select when system cable length is stable and lower cost or simpler biasing is prioritized over dynamic adaptation. |
| GS9074A | Pin-compatible but requires external DC restoration circuitry; supports 125–540 Mbps with different AEC architecture. | Used in legacy Grass Valley designs; higher external component count increases BOM and layout complexity. | Choose only for backward compatibility with existing GS9074A-based schematics; LMH0074SQE/NOPB offers integrated DC restoration. |
Compared with LMH0044SQ/NOPB and GS9074A, the LMH0074SQE/NOPB uniquely integrates adaptive equalization, full DC restoration, and programmable muting in a single 16-pin WQFN - reducing external components, simplifying layout, and enabling robust operation across variable cable deployments without host MCU involvement.
Availability
LMH0074SQE/NOPB is available at Aetrix Electronics and suitable for broadcast infrastructure, medical imaging video links, and industrial machine vision systems requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for LMH0074SQE/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 LMH0074SQE/NOPB belongs to TI's high-speed interface portfolio designed specifically for SMPTE-compliant serial digital video transport, addressing signal integrity challenges in professional video equipment from cameras to distribution hubs.
FAQ
What data rates does the LMH0074SQE/NOPB support?
The LMH0074SQE/NOPB supports data rates from 125 Mbps to 540 Mbps, covering SMPTE 259M (270 Mbps) and SMPTE 344M (540 Mbps) standards. It also supports DVB-ASI at 270 Mbps. Performance is validated across this full range with specified jitter, rise/fall time, and return loss metrics - all confirmed in the SNLS277D datasheet for LMH0074SQE/NOPB.
How does the AEC loop work in the LMH0074SQE/NOPB?
The AEC loop in the LMH0074SQE/NOPB uses an external 1 µF capacitor between AEC+ and AEC− pins to control the response time of the adaptive equalizer filter. This capacitor sets the loop bandwidth, allowing the LMH0074SQE/NOPB to dynamically adjust gain and frequency response to match real-time cable loss characteristics - a core function verified in the device's block diagram and electrical characteristics table.
Can the LMH0074SQE/NOPB accept single-ended inputs?
Yes, the LMH0074SQE/NOPB accepts both differential and single-ended inputs. The input must be AC-coupled, and transformer coupling is not supported. Internal termination allows single-ended drive into one SDI pin while the complementary SDI is grounded or biased - a capability explicitly documented in the "INPUT INTERFACING" section of the LMH0074SQE/NOPB datasheet.
What is the purpose of the MUTEREF pin on the LMH0074SQE/NOPB?
The MUTEREF pin on the LMH0074SQE/NOPB sets the threshold voltage for the carrier detect (CD) function and thus determines the cable length at which the output is automatically muted due to excessive signal degradation. Applying a higher voltage reduces allowable equalization depth; leaving it unconnected enables maximum equalization - a behavior fully detailed in the "MUTE REFERENCE (MUTEREF)" section of the LMH0074SQE/NOPB datasheet.
Is the LMH0074SQE/NOPB pin-compatible with the LMH0044?
Yes, the LMH0074SQE/NOPB is footprint-compatible with the LMH0044 and GS9074A, sharing identical 16-pin WQFN (RUM0016A) packaging and pin assignments. This allows direct PCB substitution in many designs, though functional differences exist - notably the LMH0074SQE/NOPB adds adaptive control, DC restoration, and muting features absent in the LMH0044. Confirmed in TI's "FEATURES" and "PACKAGE OPTION ADDENDUM" sections.
LMH0074SQE/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Displays
- Interface:
- Serial
- Voltage - Supply:
- 3.135V ~ 3.465V
- Supplier Device Package:
- 16-WQFN (4x4)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
LMH0074SQE/NOPB FAQ
1.How can I place an order for LMH0074SQE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH0074SQE/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 LMH0074SQE/NOPB reliable?
The price and inventory of LMH0074SQE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH0074SQE/NOPB is usually 5 days.
3.What payment methods are accepted for LMH0074SQE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH0074SQE/NOPB transactions.
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4.How is shipping managed for LMH0074SQE/NOPB?
LMH0074SQE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH0074SQE/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 LMH0074SQE/NOPB?
For technical support, including LMH0074SQE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH0074SQE/NOPB requirements.
6.How does Aetrix verify that LMH0074SQE/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH0074SQE/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 LMH0074SQE/NOPB meets industry standards.
7.What is the process for return or replacement of LMH0074SQE/NOPB?
All LMH0074SQE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH0074SQE/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 LMH0074SQE/NOPB part is unused and in its original packaging.
Return procedure for LMH0074SQE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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