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Texas Instruments LMH0024MAX
- Part No.:
- LMH0024MAX
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH0024MAX.pdf
- Description:
- IC INTERFACE SPECIALIZED 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,565
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Product details
Overview
LMH0024MAX from Texas Instruments (formerly National Semiconductor) is a 3.3V adaptive cable equalizer IC for SMPTE 259M/344M serial digital video interfaces, supporting data rates from 125 Mbps to 540 Mbps, equalizing up to 350 m of Belden 1694A coax at 270 Mbps, and featuring integrated DC restoration, CLI voltage output, and manual MUTE control - deployed in broadcast camera backends and SDI distribution amplifiers.
For engineers reviewing the LMH0024MAX datasheet, LMH0024MAX pinout, LMH0024MAX application, or LMH0024MAX equivalent, this page delivers verified electrical specs, SOIC-16 pin mapping, real-world equalization performance per cable type, functional differences versus GS9064/LMH0034, and design-critical interface constraints including AC-coupled input requirements and 50Ω differential output drive.
Technical Context
The LMH0024MAX implements a multi-stage adaptive filter with automatic equalization control (AEC) loop stabilized by an external 1 µF capacitor across AEC+ and AEC− pins; its DC restoration block handles pathological SMPTE RP 178 signals and can be bypassed via BYPASS pin. The CLI voltage (2.0–2.5 V range) provides monotonic inverse indication of equalized cable length.
It accepts single-ended or differential AC-coupled inputs (no transformer coupling), delivers 750 mVP–P differential outputs into 50 Ω loads, draws 60–77 mA supply current that decreases with increasing cable length, and operates across −40°C to +85°C with 198 mW typical power dissipation at 3.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate Range | 125 Mbps to 544 Mbps - supports full SMPTE 259M (270 Mbps) and SMPTE 344M (540 Mbps) standards with guaranteed jitter performance. |
| Equalization Capacity | Up to 350 m Belden 1694A at 270 Mbps (0.2 UI jitter) - defines maximum usable coax run before retiming required. |
| Input Interface | AC-coupled single-ended or differential - mandates 1.0 µF series coupling capacitor; transformer coupling prohibited. |
| Output Drive | 50 Ω differential, 750 mVP–P - directly interfaces with standard SDI receivers without external termination. |
| Supply & Power | Single 3.3 V ±5%, 60–77 mA ICC - current scales inversely with cable length, enabling dynamic power optimization. |
| Operating Temp | −40°C to +85°C - qualified for industrial broadcast equipment enclosures and field-deployable gear. |
| ESD Rating | HBM 8 kV / MM 250 V - meets IEC 61000-4-2 Level 3 for robustness in production handling and system integration. |
Pinout & Package
LMH0024MAX is housed in a 16-pin SOIC package (NS package code M16A), footprint-compatible with LMH0034 and GS9064, with exposed pad omitted and standard JEDEC MS-012AC dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CLI | Cable Length Indicator output - analog voltage (2.0–2.5 V) inversely proportional to equalized coax length; requires input signal to be valid. |
| 2, 15 | VCC | +3.3 V supply pins - dual connections reduce IR drop and improve PSRR in high-speed operation. |
| 3, 6, 11, 14 | VEE | Ground return pins - multiple GND pins minimize ground bounce and ensure stable common-mode reference. |
| 4, 5 | SDI / SDI | Differential serial data input - accepts AC-coupled true/complement signals; single-ended mode uses Pin 4 only. |
| 7, 8 | AEC+ / AEC− | AEC loop filter terminals - connect 1.0 µF capacitor to set adaptation bandwidth and stability. |
| 9 | BYPASS | Equalization disable control - logic high disables both adaptive equalization and DC restoration blocks. |
| 10 | NC | No-connect - must remain unconnected; no internal circuitry attached. |
| 12, 13 | SDO / SDO | Differential serial data output - 50 Ω internally terminated, 750 mVP–P, muted when MUTE = high. |
| 16 | MUTE | Output enable/disable control - tie to GND for active output; tie to VCC to force SDO/SDO low. |
Key Features
| Feature | Design Value |
|---|---|
| SMPTE 259M/344M compliance | Fully compliant with SMPTE RP 178 pathological signal handling and jitter limits - eliminates need for external retimers in standard-definition video chains. |
| Adaptive AEC loop | Self-tuning gain/bandwidth via external 1 µF capacitor - adapts to varying cable loss without firmware or host intervention. |
| Cable Length Indicator (CLI) | Analog voltage output (2.0–2.5 V) enables real-time monitoring of installed coax length - supports predictive maintenance and link diagnostics. |
| Flexible input interface | Supports both single-ended and differential AC-coupled inputs - simplifies integration with legacy FPGA outputs or newer serializer ICs. |
| Output mute control | Hardware MUTE pin allows glitch-free output blanking during hot-plug or fault recovery - avoids spurious video bursts on downstream receivers. |
Applications
| Broadcast Camera Backend | SDI Distribution Amplifier |
|---|---|
|
Use Scenario: Embedded in professional broadcast cameras to recover degraded SDI signals after long internal coax runs from sensor interface to encoder. IC Role / Device Role / Timing Role: Adaptive equalizer restoring high-frequency loss and DC balance prior to clock/data recovery in the encoder ASIC. Use Value: Enables use of cost-effective 350 m Belden 1694A instead of fiber or active repeaters - reduces camera weight and BOM cost. |
Use Scenario: Deployed in rack-mounted SDI distribution amplifiers to regenerate signals sent to multiple monitors or recorders over varied cable lengths. IC Role / Device Role / Timing Role: Signal integrity conditioner providing consistent eye opening across all output ports regardless of source cable loss. Use Value: Eliminates manual gain switching per port - CLI feedback allows auto-calibration of output amplitude per channel. |
| Video Production Switcher Input | Medical Endoscopy Video Processor |
|
Use Scenario: Front-end conditioning stage in live production switchers receiving feeds from remote OB vans via long coaxial links. IC Role / Device Role / Timing Role: SMPTE-compliant equalizer ensuring jitter < 0.2 UI at 540 Mbps - preserves timing margin for downstream frame synchronizers. Use Value: Guarantees error-free switching between sources with mismatched cable lengths - prevents frame drops during critical broadcasts. |
Use Scenario: Integrated into endoscopic video processors to restore SDI signals transmitted through flexible, lossy coax inside medical carts. IC Role / Device Role / Timing Role: Adaptive equalizer compensating for variable cable attenuation caused by coiling and bending during procedures. Use Value: Maintains diagnostic image fidelity (no pixelation or color shift) even when cables are routed through tight bends - critical for clinical accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adaptive SDI equalizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH0034MA/NOPB | Same SOIC-16 footprint, but lacks CLI output and uses fixed-gain architecture - no analog cable-length feedback. | Best suited for fixed-cable-length systems where diagnostics are unnecessary and lower cost is prioritized. | Select LMH0034MA/NOPB when CLI functionality is unused and board space allows identical layout reuse. |
| GS9064-ILQFP | QFP-32 package (not SOIC), different pinout, requires external DC restoration - no integrated level control block. | Used in legacy Gennum-based designs; not drop-in replaceable due to package and pin mismatch. | Choose GS9064-ILQFP only for redesigns retaining existing QFP layout and requiring Gennum ecosystem support. |
Compared with LMH0024MAX, LMH0034MA/NOPB offers footprint compatibility without CLI or adaptive tuning, while GS9064-ILQFP demands PCB rework and external biasing - making LMH0024MAX the optimal choice for new designs needing diagnostics, adaptability, and SOIC manufacturability.
Availability
LMH0024MAX is available at Aetrix Electronics and suitable for broadcast infrastructure, medical imaging systems, and professional video production equipment requiring stable component supply, long-lifecycle assurance, and SMPTE-compliant signal integrity.
Supply support for LMH0024MAX 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 (TI) is a global semiconductor leader delivering analog and embedded processing solutions, with deep expertise in high-speed interface, signal chain, and broadcast-grade IC design.
The LMH0024MAX belongs to TI's Serial Digital Interface (SDI) product line, engineered specifically for robust, standards-compliant equalization in professional video equipment operating under demanding thermal and EMI conditions.
FAQ
What is the primary function of the LMH0024MAX in an SDI signal chain?
The LMH0024MAX functions as an adaptive cable equalizer that restores high-frequency loss and DC balance in SMPTE 259M/344M serial digital video signals transmitted over coaxial cable. It dynamically adjusts equalization gain and bandwidth using an internal AEC loop, enabling reliable recovery of signals degraded by up to 350 meters of Belden 1694A at 270 Mbps. This ensures clean eye diagrams for downstream clock/data recovery circuits in devices like video switchers and recorders.
Can the LMH0024MAX accept single-ended input signals?
Yes, the LMH0024MAX supports both differential and single-ended AC-coupled inputs. When using single-ended mode, only Pin 4 (SDI) is driven, while Pin 5 (SDI) is terminated to VEE. The device requires a 1.0 µF series coupling capacitor on the input path, and transformer coupling is explicitly prohibited per the datasheet. This flexibility simplifies integration with FPGA I/O banks or older serializer ICs lacking differential output capability.
How does the Cable Length Indicator (CLI) output work on the LMH0024MAX?
The CLI pin (Pin 1) outputs an analog voltage inversely proportional to the length of coax being equalized - ranging from ~2.5 V at 0 m to ~2.0 V at 350 m for Belden 1694A at 270 Mbps. This voltage is derived from the AEC control loop and is only valid when a valid input signal is present. It enables real-time monitoring of cable health and automatic gain calibration in distribution amplifiers, but requires an external ADC or comparator for interpretation in the host system.
Is the LMH0024MAX pin-compatible with the GS9064?
No, the LMH0024MAX is not pin-compatible with the GS9064. While the LMH0024MAX shares footprint compatibility with the GS9064 (same pad layout for SOIC-16 vs QFP-32), their pinouts differ significantly - GS9064 uses a 32-pin QFP package with distinct signal assignments, no CLI output, and requires external DC restoration components. The LMH0024MAX datasheet states "footprint compatible", not "pin-compatible", and explicitly notes Pin 16 (MUTE) must be grounded for correct operation - a requirement absent in GS9064.
What are the power supply requirements for stable operation of the LMH0024MAX?
The LMH0024MAX requires a single 3.3 V ±5% supply (VCC) referenced to VEE (ground), with absolute maximum ratings limiting VCC to 3.6 V. It draws 60–77 mA supply current depending on cable length - highest at short cables, decreasing as equalization demand rises. Decoupling is critical: 0.1 µF ceramic capacitors must be placed near each VCC pin (Pins 2 and 15), and the device exhibits 198 mW typical power dissipation at +25°C. Operation outside −40°C to +85°C ambient invalidates specifications.
LMH0024MAX 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 259M / 344M
- Interface:
- Serial
- Voltage - Supply:
- 3.3V
- Supplier Device Package:
- 16-SOIC
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
LMH0024MAX FAQ
1.How can I place an order for LMH0024MAX through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH0024MAX 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 LMH0024MAX reliable?
The price and inventory of LMH0024MAX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH0024MAX is usually 5 days.
3.What payment methods are accepted for LMH0024MAX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH0024MAX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH0024MAX?
LMH0024MAX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH0024MAX 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 LMH0024MAX?
For technical support, including LMH0024MAX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH0024MAX requirements.
6.How does Aetrix verify that LMH0024MAX is sourced from the original manufacturer or authorized distributors?
All LMH0024MAX 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 LMH0024MAX meets industry standards.
7.What is the process for return or replacement of LMH0024MAX?
All LMH0024MAX units undergo pre-shipment inspection (PSI). If there is an issue with LMH0024MAX, 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 LMH0024MAX part is unused and in its original packaging.
Return procedure for LMH0024MAX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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