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Texas Instruments LMH0024MA
- Part No.:
- LMH0024MA
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH0024MA.pdf
- Description:
- IC INTERFACE SPECIALIZED 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,941
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Product details
Overview
LMH0024MA from Texas Instruments (formerly National Semiconductor) is a 3.3V SMPTE 259M/344M adaptive cable equalizer IC for serial digital video interfaces. It equalizes data rates from 125 Mbps to 540 Mbps, supports DVB-ASI at 270 Mbps, delivers 750 mVP–P differential output into 50Ω, and operates across −40°C to +85°C. It is used in broadcast-grade SDI receivers to restore signal integrity over coaxial cable up to 350 m (Belden 1694A at 270 Mbps).
For engineers reviewing the LMH0024MA datasheet, LMH0024MA pinout, LMH0024MA application, or LMH0024MA equivalent, key selection criteria include SMPTE compliance, CLI voltage tracking, manual bypass capability, mute control logic, and SOIC-16 footprint compatibility with LMH0034 and GS9064.
Technical Context
The LMH0024MA implements a multi-stage adaptive filter whose gain and bandwidth are dynamically adjusted via an external 1µF AEC loop capacitor across pins AEC+ and AEC−. Its DC restoration block handles pathological SMPTE RP 178 signals and can be disabled via the BYPASS pin.
Cable length indication is derived from the AEC loop and appears as an analog voltage on CLI (Pin 1), decreasing from 2.5 V (0 m) to 2.0 V (max cable). Output muting is controlled by a TTL-compatible MUTE pin (Pin 16) that forces SDO/SDO low when pulled high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate Range | 125 Mbps to 540 Mbps - supports SMPTE 259M (270 Mbps), SMPTE 344M (540 Mbps), and DVB-ASI (270 Mbps) |
| Equalization Capacity | Up to 350 m Belden 1694A at 270 Mbps - enables long-haul SDI signal recovery without repeaters |
| Output Swing | 750 mVP–P differential into 50Ω - meets SMPTE 259M output amplitude requirements |
| Supply & Temp | +3.3 V ±5% supply; −40°C to +85°C industrial range - suitable for broadcast equipment in uncontrolled environments |
| Power Consumption | 60–77 mA typical ICC - decreases with increasing cable length, enabling thermal-aware system design |
| Input Interface | Single-ended or differential AC-coupled input - simplifies front-end design with legacy or modern drivers |
| CLI Voltage Range | 2.5 V (0 m) to 2.0 V (max cable) - provides real-time analog feedback for cable diagnostics and status monitoring |
Pinout & Package
LMH0024MA is housed in a 16-pin SOIC package (NS Package Number M16A), with exposed pad not present and standard JEDEC MS-012AC dimensions. Pin 10 is NC; all VEE pins (3, 6, 11, 14) must be connected to ground; dual VCC pins (2, 15) require local decoupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CLI | Cable Length Indicator output | Analog voltage inversely proportional to equalized cable length; requires no load for accuracy |
| 2 VCC | Positive supply | +3.3 V primary power rail; must be decoupled near pin with 0.1 µF ceramic capacitor |
| 3, 6, 11, 14 VEE | Ground reference | All four ground pins must be tied to low-impedance PCB ground plane to minimize noise coupling |
| 4, 5 SDI / SDI | Differential serial data input | Accepts AC-coupled true/complement signals; supports single-ended drive with proper termination |
| 7 AEC+, 8 AEC− | AEC loop filter interface | External 1 µF capacitor sets AEC loop dynamics; determines adaptation speed and stability |
| 9 BYPASS | Equalization disable control | High = disables both equalizer filter and DC restoration; used for test or low-rate bypass mode |
| 10 NC | No connect | Not internally bonded; must remain unconnected and unpopulated on PCB |
| 12, 13 SDO / SDO | Differential serial data output | 50Ω internally terminated; 750 mVP–P swing; muted when MUTE = high |
| 16 MUTE | Output enable/disable control | TTL-compatible: high = outputs forced low; low = normal operation; must not float |
Key Features
| Feature | Design Value |
|---|---|
| SMPTE 259M/344M compliance | Guaranteed electrical performance per SMPTE standards - ensures interoperability in professional video infrastructure |
| Adaptive equalization with CLI | Real-time analog voltage output reflects actual cable loss - enables remote diagnostics and automatic gain staging |
| DC restoration with bypass | Self-biasing circuit corrects baseline wander on pathological video patterns; optional disable for legacy low-rate systems |
| Flexible input interface | Accepts either differential or single-ended AC-coupled inputs - reduces bill-of-materials and layout complexity |
| Footprint compatibility | Pin-to-pin and land-pattern compatible with LMH0034 and Gennum GS9064 - enables drop-in replacement in existing designs |
Applications
| Broadcast SDI Receiver | Studio Camera Interface |
|---|---|
Use Scenario: Receiving serial digital video from camera head units over long coaxial runs in live production trucks. IC Role / Device Role / Timing Role: Adaptive cable equalizer restoring high-frequency content lost in Belden 1694A cable up to 300 m. Use Value: Eliminates need for intermediate repeaters; maintains SMPTE 259M eye diagram integrity at 270 Mbps with <0.2 UI jitter. | Use Scenario: Integrating SDI input on camera control units where space and thermal budget constrain active components. IC Role / Device Role / Timing Role: Signal conditioning front-end for FPGA-based SDI deserializers, providing clean recovered data. Use Value: 198 mW typical power draw and SOIC-16 footprint enable compact, fanless enclosure designs. |
| Video Routing Switcher | OEM Broadcast Monitor Input |
Use Scenario: Input stage of 32×32 SDI router handling mixed-rate signals (270/540 Mbps) from diverse sources. IC Role / Device Role / Timing Role: Rate-agnostic equalizer supporting both SMPTE 259M and 344M without configuration changes. Use Value: Single device handles multiple video standards; CLI voltage allows firmware to auto-detect cable length and adjust downstream gain. | Use Scenario: Front-panel SDI input on professional waveform monitors requiring stable, jitter-controlled signal recovery. IC Role / Device Role / Timing Role: Final equalization stage before clock/data recovery (CDR) circuitry, ensuring minimal deterministic jitter. Use Value: 100–220 ps output rise/fall time and <5% overshoot preserve signal fidelity for accurate waveform analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adaptive cable equalizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH0034MA | Same SOIC-16 footprint; higher max data rate (1.485 Gbps); supports SMPTE 424M; no CLI output | Required for HD-SDI (1.485 Gbps) and 3G-SDI systems; lacks analog cable-length feedback | Select LMH0034MA when upgrading to HD/3G-SDI; retain LMH0024MA for cost-sensitive SD-SDI with CLI diagnostics. |
| GS9064-ILQ | Gennum part; identical pinout and function except MUTE logic inverted; requires Pin 16 tied to GND (not floating) | Legacy Gennum-based designs; same 270 Mbps performance but different mute polarity and no BYPASS pin | LMH0024MA replaces GS9064 with no PCB change if MUTE is grounded; verify mute control logic in firmware. |
Compared with LMH0034MA and GS9064-ILQ, the LMH0024MA uniquely combines SD-SDI support, CLI diagnostics, and BYPASS functionality in a single SOIC-16 package-making it optimal for SMPTE 259M systems requiring cable health monitoring and flexible test modes.
Availability
LMH0024MA is available at Aetrix Electronics and suitable for broadcast video infrastructure, studio equipment manufacturing, and professional AV signal distribution requiring stable component supply, long-lifecycle support, and SMPTE-compliant signal integrity.
Supply support for LMH0024MA 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 company delivering analog and embedded processing solutions, with deep heritage in high-speed interface and video signal conditioning ICs.
The LMH0024MA belongs to TI's Serial Digital Interface (SDI) product line, engineered specifically for broadcast-grade video equalization, cable loss compensation, and robust SMPTE compliance in professional video equipment.
FAQ
What is the maximum supported cable length for LMH0024MA at 270 Mbps?
The LMH0024MA equalizes up to 350 meters of Belden 1694A coaxial cable at 270 Mbps while maintaining ≤0.2 UI output jitter. Performance varies with cable type: it supports 280 m on Belden 8281 at the same rate. Cable length is tracked in real time via the CLI pin voltage, which drops from 2.5 V (0 m) to 2.0 V (maximum equalized length).
Does LMH0024MA support both SMPTE 259M and SMPTE 344M standards?
Yes, the LMH0024MA is explicitly designed and tested for full compliance with both SMPTE 259M (270 Mbps) and SMPTE 344M (540 Mbps) standards. Its adaptive equalizer operates across 125–540 Mbps, and its output swing, jitter, and return loss meet SMPTE specifications across this entire range - confirmed in the SNLS210F datasheet.
How does the CLI (Cable Length Indicator) function on LMH0024MA?
The CLI pin (Pin 1) outputs an analog voltage inversely proportional to the amount of cable loss being compensated. With no cable (0 m), CLI reads ~2.5 V; at maximum equalized length, it drops to ~2.0 V. This voltage is only valid when an input signal is present, and it derives directly from the AEC control loop - enabling real-time cable diagnostics without external measurement tools.
Can LMH0024MA accept single-ended input signals?
Yes, the LMH0024MA supports both differential and single-ended AC-coupled inputs. The SDI/SDI pins accept either configuration: for single-ended use, one pin is driven and the other is terminated to 50Ω to ground. Transformer coupling is not supported, and input coupling capacitance must be 1.0 µF per the recommended operating conditions.
Is LMH0024MA pin-compatible with the Gennum GS9064?
Yes, the LMH0024MA is footprint-compatible with the Gennum GS9064, sharing identical SOIC-16 pinout and land pattern. However, Pin 16 (MUTE) has inverted logic: GS9064 asserts mute when low, while LMH0024MA mutes when high. For drop-in replacement, tie LMH0024MA Pin 16 to GND and verify system-level mute behavior in firmware.
LMH0024MA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- SMPTE 259M / 344M
- Interface:
- Serial
- Voltage - Supply:
- 3.3V
- Supplier Device Package:
- 16-SOIC
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
LMH0024MA FAQ
1.How can I place an order for LMH0024MA through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH0024MA 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 LMH0024MA reliable?
The price and inventory of LMH0024MA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH0024MA is usually 5 days.
3.What payment methods are accepted for LMH0024MA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH0024MA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH0024MA?
LMH0024MA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH0024MA 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 LMH0024MA?
For technical support, including LMH0024MA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH0024MA requirements.
6.How does Aetrix verify that LMH0024MA is sourced from the original manufacturer or authorized distributors?
All LMH0024MA 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 LMH0024MA meets industry standards.
7.What is the process for return or replacement of LMH0024MA?
All LMH0024MA units undergo pre-shipment inspection (PSI). If there is an issue with LMH0024MA, 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 LMH0024MA part is unused and in its original packaging.
Return procedure for LMH0024MA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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