My Inquiry
My Account
Texas Instruments LMH0074SQ/NOPB
- Part No.:
- LMH0074SQ/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
LMH0074SQ/NOPB.pdf
- Description:
- IC INTERFACE SPECIALIZED 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,110
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMH0074SQ/NOPB from Texas Instruments is an SMPTE 259M/344M-compliant adaptive cable equalizer IC 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 delivering 750 mVP–P differential output swing into 50 Ω with single 3.3 V supply operation.
For engineers reviewing the LMH0074SQ/NOPB datasheet, LMH0074SQ/NOPB pinout, LMH0074SQ/NOPB application, or LMH0074SQ/NOPB equivalent, this device serves as a high-fidelity signal recovery solution in broadcast-grade SDI infrastructure where cable loss compensation, carrier detection, and programmable mute control are critical.
Technical Context
The LMH0074SQ/NOPB 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 bandwidth and gain adjustment based on input signal integrity. Its DC restoration block fully restores baseline levels for pathological SMPTE RP-178 test patterns.
It features dual-mode input handling (single-ended or differential), integrated carrier detect (CD) logic that asserts high when no valid signal is present, and independent MUTE control with programmable threshold via MUTEREF voltage - all operating within −40°C to +85°C industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate Range | 125 Mbps to 540 Mbps - supports both SMPTE 259M (SD-SDI) and SMPTE 344M (HD-SDI) standards without reconfiguration. |
| Max Equalized Cable | 400 m Belden 1694A at 270 Mbps - enables long-haul SDI routing in broadcast trucks and studio interconnects. |
| Output Swing | 750 mVP–P differential into 50 Ω - meets SMPTE output amplitude compliance for downstream reclocking and distribution. |
| Supply Voltage | 3.3 V ±5% - compatible with standard low-voltage digital video system power rails. |
| Power Consumption | 63–77 mA typical - decreases with increasing cable length, optimizing thermal design in dense video routing cards. |
| Input Return Loss | 15–20 dB (5 MHz–1.5 GHz) - ensures minimal reflection-induced jitter on AC-coupled inputs. |
| Jitter Tolerance | ≤0.2 UI at 270 Mbps over 400 m Belden 1694A - preserves eye opening for reliable CDR lock in receiver stages. |
Pinout & Package
LMH0074SQ/NOPB is housed in a 16-pin WQFN package (RUM0016A), 4 mm × 4 mm × 0.8 mm, with 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 serial data paths. |
| 2, 3 | SDI / SDI | Differential serial data input - accepts AC-coupled true/complement signals; supports single-ended mode with one pin grounded. |
| 5, 6 | AEC+ / AEC− | AEC loop filter connection - requires 1 µF capacitor to set adaptive convergence time and stability. |
| 7 | BYPASS | Equalization disable control - forces pass-through mode with no DC restoration or adaptive filtering. |
| 8 | MUTEREF | Mute reference voltage input - sets CD threshold; floating for maximum equalization length, or biased to reduce effective cable reach. |
| 10, 11 | SDO / SDO | Differential serial data output - internally terminated to 50 Ω per leg, delivering 750 mVP–P swing. |
| 13, 16 | VCC | Positive supply (+3.3 V) - two dedicated power pins improve PSRR and reduce supply noise coupling. |
| 14 | MUTE | Output mute enable - high = muted outputs; tied to CD for automatic muting when carrier absent. |
| 15 | CD | Carrier detect output - open-drain high when no valid signal detected; used with MUTE for fail-safe blanking. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive equalization architecture | Multi-stage filter with AEC loop dynamically adjusts gain/bandwidth to match actual cable loss profile in real time. |
| DC restoration with level control | Self-biasing circuit maintains correct common-mode and amplitude across pathological SMPTE color bar sequences. |
| Programmable carrier-based muting | MUTEREF voltage sets precise cable-length-dependent mute threshold, preventing noise propagation during signal loss. |
| Footprint compatibility | Pin-to-pin compatible with LMH0044 and GS9074A - enables drop-in upgrade path in existing SDI hardware designs. |
| Industrial temperature operation | Validated from −40°C to +85°C - suitable for broadcast equipment deployed in uncontrolled environmental enclosures. |
Applications
| Studio Camera Interface | Mobile Broadcast Truck Routing |
|---|---|
Use Scenario: Transmitting HD-SDI video from camera head to base station over 300 m of coaxial cable in live sports production. IC Role / Device Role / Timing Role: Adaptive equalizer restoring signal integrity at receiver end of long coax run, enabling clean CDR lock. Use Value: Eliminates need for repeaters or fiber conversion, reducing latency and system cost while maintaining SMPTE 344M compliance. |
Use Scenario: Consolidating multiple SDI sources onto a central router in a space-constrained mobile OB van. IC Role / Device Role / Timing Role: Signal recovery front-end before crosspoint switching and distribution amplification. Use Value: Compensates for variable cable lengths and aging infrastructure, ensuring consistent eye margin across all input channels. |
| Medical Imaging Video Capture | Post-Production Monitoring System |
Use Scenario: Capturing uncompressed 1080p60 video from surgical endoscopes over installed building coax. IC Role / Device Role / Timing Role: High-fidelity equalization preserving pixel accuracy and timing stability required for diagnostic review. Use Value: Maintains <0.2 UI jitter even after 400 m of Belden 1694A, preventing frame drops or artifacts in critical imaging workflows. |
Use Scenario: Feeding calibrated reference monitors from a master control room with mixed cable runs (50–250 m). IC Role / Device Role / Timing Role: Input conditioning stage ensuring uniform signal amplitude and rise/fall symmetry across all monitor feeds. Use Value: Enables consistent color fidelity and sync stability by eliminating cable-induced amplitude tilt and group delay variation. |
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); lacks MUTEREF and CD functionality; lower power (45 mA). | Suitable only for fixed-length, stable-cable installations; no automatic mute or carrier detection. | Select when cable length is known and invariant, and system-level mute control is handled externally. |
| GS9074A | Same pinout and function but with different AEC response tuning; slightly higher ICC (82 mA typical); RoHS-6 compliant. | Identical use cases but may require layout validation due to minor jitter performance variance at extreme cable lengths. | Choose for legacy design continuity where GS9074A qualification data already exists in production systems. |
Compared with LMH0074SQ/NOPB, LMH0044SQ/NOPB trades adaptability for simplicity and lower power, while GS9074A offers functional equivalence with alternate process calibration - making LMH0074SQ/NOPB optimal for dynamic, field-deployed SDI links requiring autonomous signal health management.
Availability
LMH0074SQ/NOPB is available at Aetrix Electronics and suitable for broadcast infrastructure, medical video capture, and mobile production systems requiring stable component supply, long-term obsolescence mitigation, and full traceability.
Supply support for LMH0074SQ/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 video interface solutions.
The LMH0074SQ/NOPB belongs to TI's high-speed serial interface product line, engineered specifically for SMPTE-compliant SDI signal recovery in professional video equipment where cable loss compensation and signal integrity preservation are non-negotiable.
FAQ
What is the primary function of the LMH0074SQ/NOPB in an SDI signal chain?
The LMH0074SQ/NOPB functions as an adaptive cable equalizer that compensates for high-frequency attenuation in coaxial cables used for SMPTE 259M and SMPTE 344M serial digital video transmission. It dynamically adjusts its equalization response using an external AEC capacitor to restore signal integrity, supports DC restoration for pathological data patterns, and provides carrier detect and programmable mute features - all critical for reliable video signal recovery in broadcast and medical imaging systems.
Does the LMH0074SQ/NOPB require external passive components for basic operation?
Yes, the LMH0074SQ/NOPB requires two key external components: a 1 µF capacitor between AEC+ and AEC− pins to stabilize the adaptive equalization loop, and AC-coupling capacitors (typically 1.0 µF) on the SDI input lines. The MUTEREF pin may be left floating for maximum equalization range or biased with a resistor divider to set a custom mute threshold - no additional components are needed for core equalization or output driving functionality.
Can the LMH0074SQ/NOPB operate with single-ended input signals?
Yes, the LMH0074SQ/NOPB supports both differential and single-ended input configurations. When used in single-ended mode, one SDI pin (e.g., SDI) is driven with the AC-coupled signal while the complementary SDI pin is grounded. The internal input structure accommodates this configuration without performance degradation, though differential operation is preferred for superior common-mode noise rejection in electrically noisy broadcast environments.
What is the significance of the BYPASS pin on the LMH0074SQ/NOPB?
The BYPASS pin on the LMH0074SQ/NOPB disables both the adaptive equalization filter and the DC restoration circuit when driven high, allowing the input signal to pass through with minimal alteration. In this mode, the device acts as a simple buffer with no gain adjustment or baseline correction - useful for system diagnostics, short-cable scenarios where equalization is unnecessary, or interoperability testing with legacy equipment that does not require active signal conditioning.
How does the LMH0074SQ/NOPB handle pathological data patterns like SMPTE color bars?
The LMH0074SQ/NOPB incorporates a dedicated DC restoration and level control block that actively maintains correct common-mode voltage and amplitude during extended DC-free sequences such as SMPTE RP-178 color bar test patterns. This prevents baseline wander and output clipping, ensuring stable eye diagrams and reliable clock-data recovery - a capability verified in characterization across worst-case pathological conditions at 270 Mbps and beyond.
LMH0074SQ/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
LMH0074SQ/NOPB FAQ
1.How can I place an order for LMH0074SQ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH0074SQ/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 LMH0074SQ/NOPB reliable?
The price and inventory of LMH0074SQ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH0074SQ/NOPB is usually 5 days.
3.What payment methods are accepted for LMH0074SQ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH0074SQ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH0074SQ/NOPB?
LMH0074SQ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH0074SQ/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 LMH0074SQ/NOPB?
For technical support, including LMH0074SQ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH0074SQ/NOPB requirements.
6.How does Aetrix verify that LMH0074SQ/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH0074SQ/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 LMH0074SQ/NOPB meets industry standards.
7.What is the process for return or replacement of LMH0074SQ/NOPB?
All LMH0074SQ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH0074SQ/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 LMH0074SQ/NOPB part is unused and in its original packaging.
Return procedure for LMH0074SQ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMH0074SQ/NOPB Tags
-
NVT4857UKAZ
NXP Semiconductors
-
TCA8418RTWR
Texas Instruments
-
PCA9546APWR
Texas Instruments
-
MD0100N8-G
Microchip Technology
-
PCA9548APW,118
NXP Semiconductors
-
PCA9540BDP,118
NXP Semiconductors
-
PCA9548APWR
Texas Instruments
-
PCA9546APW,118
NXP Semiconductors
-
PTN3360DBS,518
NXP Semiconductors
-
PCA9546ABS,118
NXP Semiconductors
-
PCA9518PWR
Texas Instruments
-
PCA9545APW,118
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
