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Texas Instruments LMH0034MAX
- Part No.:
- LMH0034MAX
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH0034MAX.pdf
- Description:
- IC INTERFACE SPECIALIZED 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,966
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Product details
Overview
LMH0034MAX 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 featuring integrated DC restoration, CLI voltage output, and bi-directional CD/MUTE control - deployed in broadcast camera backends and SDI distribution amplifiers.
For engineers reviewing the LMH0034MAX datasheet, LMH0034MAX pinout, LMH0034MAX application, or LMH0034MAX equivalent, key selection criteria include its 16-pin SOIC package, 3.3V single-supply operation, differential input/output capability, programmable mute threshold via MUTEREF, and SMPTE-compliant jitter performance across variable cable lengths.
Technical Context
The LMH0034MAX implements a multi-stage adaptive filter with automatic equalization control (AEC) governed by an external 1 µF capacitor across AEC+ and AEC− pins, enabling real-time compensation for dispersive loss in 75 Ω coaxial media. Its DC restoration block handles pathological SMPTE RP-178/RP-198 video patterns without baseline wander.
Cable length indication (CLI) provides a monotonic analog voltage (2.5 V → 1.9 V) inversely proportional to equalized cable length, while the bi-directional CD/MUTE pin supports both carrier-detect output and manual output muting - all operating within 0°C to +85°C ambient with 208 mW typical power draw at 3.3 V.
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 signals |
| Equalization Capacity | Up to 200 m Belden 1694A at 1.485 Gbps - enables long-haul HD-SDI transmission without repeaters |
| Input Configuration | Differential or single-ended AC-coupled input - accommodates transformerless PCB layouts with 1.0 µF coupling capacitors |
| Output Drive | 50 Ω differential outputs (SDO/SDO) delivering 750 mVP–P - directly interfaces with standard 75 Ω coaxial receivers |
| Supply & Power | Single 3.3 V ±5% supply; 63–77 mA ICC - current decreases with increasing cable length, optimizing thermal design |
| Jitter Tolerance | ≤ 0.25 UI at 1.485 Gbps over 140 m Belden 1694A - ensures robust eye opening for SDI clock recovery circuits |
| CLI Voltage Range | 2.5 V (0 m) to 1.9 V (max cable) - provides analog feedback for system-level cable diagnostics and auto-configuration |
Pinout & Package
LMH0034MAX is housed in a 16-pin SOIC (D) package with standard 1.27 mm pitch, JEDEC MS-012AC compliant, RoHS-compliant matte tin lead finish, and MSL Level-1 rating for unlimited floor life at ≤30°C/60% RH.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CLI | Analog voltage output inversely proportional to equalized cable length - used for diagnostics or auto-threshold setting |
| 2, 15 | VCC | +3.3 V power supply pins - dual connections reduce IR drop and improve PSRR |
| 3, 6, 11, 14 | VEE | Ground reference pins - multiple low-inductance returns minimize ground bounce on high-speed outputs |
| 4, 5 | SDI / SDI | Differential serial data input pair - accepts AC-coupled SMPTE-compliant signals; supports single-ended drive if needed |
| 7, 8 | AEC+ / AEC− | External loop filter terminals for AEC capacitor (1 µF) - sets adaptation speed and stability of equalization loop |
| 9 | BYPASS | Active-high disable of equalization and DC restoration - enables transparent pass-through mode for test or low-rate use |
| 10 | MUTEREF | Programmable mute threshold reference - determines maximum cable length before automatic output muting |
| 12, 13 | SDO / SDO | Differential serial data output pair - internally terminated to 50 Ω, delivers 750 mVP–P into 75 Ω load |
| 16 | CD/MUTE | Bi-directional carrier detect/mute control - outputs high when no signal present; accepts high/low override to force mute/enable |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Equalization | Real-time compensation for frequency-dependent loss in coaxial cables up to 200 m at 1.485 Gbps, eliminating manual tuning |
| DC Restoration | Self-biasing circuitry maintains correct signal baseline under pathological SMPTE video patterns, preventing sync loss |
| Cable Length Indicator (CLI) | Analog voltage output (2.5 V → 1.9 V) enables firmware-based cable diagnostics and dynamic gain calibration |
| Programmable Output Muting | MUTEREF pin allows precise setting of mute threshold based on expected cable loss, avoiding false triggers |
| Form-Fit-Function Replacement | Direct drop-in replacement for Gennum GS1524/GS1524A - same pinout, footprint, and electrical behavior |
Applications
| Broadcast Camera Backend | HD-SDI Distribution Amplifier |
|---|---|
|
Use Scenario: High-definition video capture in ENG/EFP cameras where raw sensor data is serialized and transmitted over long coaxial runs to recorders or switchers. IC Role / Device Role / Timing Role: Adaptive equalizer restoring signal integrity at the receiver end of 100–200 m Belden 1694A cable, maintaining SMPTE 292M compliance. Use Value: Eliminates need for fixed-gain equalizers or repeaters, reducing BOM count and enabling plug-and-play cabling in mobile production environments. |
Use Scenario: Multi-output HD-SDI fanout in broadcast trucks or OB vans, distributing one source to multiple monitors, recorders, or encoders. IC Role / Device Role / Timing Role: Input equalizer stage before clock recovery and re-timing, ensuring clean signal delivery to downstream reclockers. Use Value: Maintains <0.25 UI jitter at 1.485 Gbps after 140 m cable, preserving eye margin for reliable CDR lock across all outputs. |
| Medical Imaging Endoscope Interface | Professional Video Monitor Input |
|
Use Scenario: Transmitting uncompressed HD video from surgical endoscopes through flexible, space-constrained coaxial bundles inside medical carts. IC Role / Device Role / Timing Role: Cable equalizer compensating for bandwidth-limiting effects of small-diameter, high-loss coaxial assemblies. Use Value: Enables use of cost-effective 75 Ω micro-coax instead of fiber, with CLI feedback allowing real-time cable health monitoring during procedures. |
Use Scenario: Front-panel SDI input on professional broadcast monitors requiring robust signal acquisition from variable-length field cables. IC Role / Device Role / Timing Role: Input conditioning IC providing automatic equalization, carrier detection, and mute control before internal video processing. Use Value: CD/MUTE pin drives front-panel LED indicators and disables display blanking during cable disconnects or signal loss events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adaptive SDI equalizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GS1524A | Same pinout and function; legacy Gennum part with identical CLI, CD/MUTE, and AEC behavior - discontinued but supported in legacy designs | Requires same 1 µF AEC capacitor and 3.3 V supply; no layout change needed | Select GS1524A only for second-source continuity in existing Gennum-based designs; LMH0034MAX offers TI's long-term supply assurance |
| LMH0344MA | TI's pin-compatible successor with extended 2.97 Gbps support (SMPTE 424M), higher ESD rating (12 kV HBM), and improved jitter performance (<0.15 UI) | Supports 3G-SDI and hybrid 12G-SDI systems; requires updated firmware for CLI scaling and AEC capacitor value | Choose LMH0344MA for new 3G-SDI designs or where future-proofing beyond 1.485 Gbps is required; LMH0034MAX remains optimal for cost-sensitive 1.5G-SDI deployments |
Compared with GS1524A, LMH0034MAX provides identical functionality with TI's manufacturing continuity and enhanced process reliability; compared with LMH0344MA, it trades 3G-SDI capability for lower cost and proven stability in established 1.5G-SDI infrastructure.
Availability
LMH0034MAX is available at Aetrix Electronics and suitable for broadcast equipment, medical imaging systems, and professional video monitors requiring stable component supply, long-lifecycle support, and SMPTE-compliant signal integrity.
Supply support for LMH0034MAX 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 video interface solutions.
The LMH0034MAX 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 over coaxial cable is mission-critical.
FAQ
What is the maximum cable length LMH0034MAX can equalize at 1.485 Gbps?
The LMH0034MAX equalizes up to 200 meters of Belden 1694A coaxial cable at 1.485 Gbps while maintaining SMPTE 292M compliance and ≤0.25 UI jitter. This capacity is confirmed in the official TI datasheet SNLS213H and validated on the SD034 evaluation board. Performance depends on cable quality and termination; actual reach may vary slightly with alternate cable types like Belden 8281.
Does LMH0034MAX require external components for basic operation?
Yes, LMH0034MAX requires three mandatory external components: two 1.0 µF AC-coupling capacitors on SDI inputs, and one 1.0 µF capacitor between AEC+ and AEC− pins to set the adaptation loop dynamics. Optional components include a pull-down on MUTEREF for default full-range equalization and bypass capacitor(s) on VCC pins per high-frequency decoupling best practices.
Is LMH0034MAX pin-compatible with the Gennum GS1524 series?
Yes, LMH0034MAX is form-fit-function compatible with both GS1524 and GS1524A - identical 16-pin SOIC footprint, matching pin assignments (including CLI, CD/MUTE, and AEC+/-), and equivalent electrical behavior. TI explicitly states this compatibility in the "Replacing the Gennum GS1524" section of SNLS213H, making LMH0034MAX a direct drop-in replacement.
How does the CLI (Cable Length Indicator) output function in LMH0034MAX?
The CLI pin on LMH0034MAX outputs a DC voltage inversely proportional to equalized cable length: 2.5 V at 0 m, decreasing to ~1.9 V at maximum supported length. This analog signal is valid only when an input signal is present and is derived from the AEC control loop. It enables real-time cable diagnostics and adaptive system configuration without requiring external measurement tools.
What is the role of the CD/MUTE pin on LMH0034MAX?
The CD/MUTE pin on LMH0034MAX is bi-directional: as an output, it asserts high when no valid carrier is detected (enabling automatic output muting); as an input, it accepts logic-high to force mute or logic-low to force outputs active - overriding carrier detect. Its behavior is modulated by MUTEREF voltage, and it is disabled entirely when BYPASS is asserted high.
LMH0034MAX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- SMPTE 292M / 259 M
- Interface:
- Serial
- Voltage - Supply:
- 3.135V ~ 3.465V
- Supplier Device Package:
- 16-SOIC
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
LMH0034MAX FAQ
1.How can I place an order for LMH0034MAX through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH0034MAX 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 LMH0034MAX reliable?
The price and inventory of LMH0034MAX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH0034MAX is usually 5 days.
3.What payment methods are accepted for LMH0034MAX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH0034MAX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH0034MAX?
LMH0034MAX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH0034MAX 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 LMH0034MAX?
For technical support, including LMH0034MAX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH0034MAX requirements.
6.How does Aetrix verify that LMH0034MAX is sourced from the original manufacturer or authorized distributors?
All LMH0034MAX 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 LMH0034MAX meets industry standards.
7.What is the process for return or replacement of LMH0034MAX?
All LMH0034MAX units undergo pre-shipment inspection (PSI). If there is an issue with LMH0034MAX, 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 LMH0034MAX part is unused and in its original packaging.
Return procedure for LMH0034MAX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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