My Inquiry
My Account
Texas Instruments LMH0344SQ/NOPB
- Part No.:
- LMH0344SQ/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
LMH0344SQ/NOPB.pdf
- Description:
- IC INTERFACE SPECIALIZED 16LLP
- Quantity:
- Payment:
- Shipping:
Inventory:324
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMH0344SQ/NOPB from Texas Instruments is a 3-Gbps HD/SD SDI adaptive cable equalizer IC designed for serial digital video signal recovery over coaxial cable. It supports SMPTE ST 424 (3G), ST 292 (HD), ST 344 (HD), and ST 259 (SD) standards, operates from 125 Mbps to 2.97 Gbps, equalizes up to 120 m of Belden 1694A at 2.97 Gbps with ≤0.3 UI output jitter, and features DC restoration, carrier detect, and programmable mute functionality - deployed in broadcast camera backends, video routers, and production switchers.
For engineers reviewing the LMH0344SQ/NOPB datasheet, LMH0344SQ/NOPB pinout, LMH0344SQ/NOPB application, or LMH0344SQ/NOPB equivalent, key selection criteria include its adaptive equalization bandwidth, 3.3-V single-supply operation, WQFN-16 package compatibility with LMH0044/LMH0384, differential input/output interface, and compliance with SMPTE return loss requirements for 75-Ω coaxial systems.
Technical Context
The LMH0344SQ/NOPB implements a multistage adaptive filter controlled by an external 1-µF AEC capacitor across AEC+ and AEC− pins, enabling real-time compensation of dispersive loss in coaxial media. Its DC restoration block fully restores baseline for pathological video patterns per SMPTE RP 178 and RP 198, while maintaining input common-mode voltage ≥1.9 V and supporting both single-ended and differential AC-coupled inputs.
Carrier detection and output muting are decoupled functions: CD outputs LVCMOS-high when no valid signal is present, and MUTE forces SDO/SDO to logic zero when driven high; MUTEREF sets the threshold for automatic muting based on signal degradation level. The device operates in BYPASS mode when the BYPASS pin is asserted, disabling both equalization and DC restoration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate Range | 125 Mbps to 2.97 Gbps - supports full SMPTE SD/HD/3G-SDI hierarchy including DVB-ASI at 270 Mbps. |
| Cable Equalization | Up to 120 m Belden 1694A at 2.97 Gbps - enables long-haul routing in broadcast infrastructure without repeaters. |
| Output Jitter | ≤0.3 UI (typ.) at 2.97 Gbps - meets SMPTE ST 424 timing budget for reclocking and downstream deserialization. |
| Input Interface | Differential or single-ended AC-coupled - requires 1-µF X7R ceramic coupling capacitors; transformer coupling not supported. |
| Supply & Power | Single 3.3-V supply (±3.5%); 85–100 mA ICC - simplifies power design vs dual-rail alternatives; 280-mW typical dissipation. |
| ESD Rating | HBM ±8 kV - exceeds IEC 61000-4-2 Level 4 for robustness in field-deployed video equipment. |
| Package | 16-pin WQFN (4 mm × 4 mm) - footprint-compatible with LMH0044, LMH0384, and LMH0074 for design reuse. |
Pinout & Package
LMH0344SQ/NOPB is housed in a 4-mm × 4-mm, 16-pin WQFN package (RUM) with exposed die attach pad (DAP) connected to VEE. The package supports reflow soldering per JEDEC J-STD-020 and provides thermal resistance RθJA = 40°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDI / SDI | True/complement analog input | Differential or single-ended AC-coupled serial data input; accepts 720–950 mVP–P swing; requires 1-µF coupling cap. |
| SDO / SDO | True/complement analog output | 50-Ω internally terminated differential outputs; deliver 750 mVP–P into 100-Ω load; no external termination needed. |
| AEC+ / AEC− | Analog loop filter terminals | Connect external 1-µF capacitor to set adaptive equalizer bandwidth and convergence time for varying cable lengths. |
| MUTE / CD / MUTEREF | LVCMOS control & analog reference | MUTE forces output mute; CD indicates carrier presence; MUTEREF sets muting threshold - enables automatic fail-safe behavior. |
| BYPASS | LVCMOS functional disable | High-level assertion disables equalization and DC restoration; requires external pulldown if unused to prevent floating. |
| VCC / VEE / DAP | Power and ground | VCC = +3.3 V; VEE = ground; DAP is negative terminal - must be soldered to PCB ground plane for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive equalization | Real-time compensation of dispersive loss across 125 Mbps–2.97 Gbps, enabling interoperability with legacy and 3G-SDI infrastructure. |
| DC restoration | Full baseline correction for pathological video patterns (SMPTE RP 178/RP 198), preventing bit errors in long-run coaxial links. |
| Programmable muting | MUTEREF-adjustable threshold allows precise control of maximum equalizable cable length before automatic output muting. |
| Carrier detect integration | CD output signals loss-of-lock independently of MUTE, enabling system-level fault reporting without disrupting mute logic. |
| Footprint compatibility | WQFN-16 layout matches LMH0044/LMH0384/LMH0074 - reduces redesign effort when upgrading SD/HD to 3G-SDI signal paths. |
Applications
| Broadcast Camera Backend | Video Router Input Stage |
|---|---|
|
Use Scenario: Recover degraded SDI signals from long coaxial runs between camera head and base station. IC Role / Device Role / Timing Role: Adaptive equalizer and DC restorer placed immediately after BNC connector to restore eye opening prior to reclocking. Use Value: Enables 120 m reach at 2.97 Gbps using standard Belden 1694A, eliminating need for active repeaters or fiber conversion. |
Use Scenario: Accept multiple SDI inputs from diverse sources (cameras, servers, playback decks) with variable cable lengths and signal integrity. IC Role / Device Role / Timing Role: Front-end equalizer per channel ensuring consistent signal quality before switching matrix and distribution amplifiers. Use Value: Automatic adaptation eliminates manual gain/boost settings; BYPASS pin allows diagnostic pass-through during maintenance. |
| Production Switcher Input | OEM Broadcast Monitor Interface |
|
Use Scenario: Process real-time 10-bit 4:4:4:4 video streams from multiple cameras for live mixing and effects generation. IC Role / Device Role / Timing Role: Signal conditioning IC restoring jitter and amplitude margin before FPGA-based deserialization and processing. Use Value: ≤0.3 UI output jitter ensures reliable sampling by downstream clock-data recovery circuits in FPGA or ASIC receivers. |
Use Scenario: Integrate SDI monitoring capability into compact OEM monitors used on-set or in mobile trucks. IC Role / Device Role / Timing Role: Low-power (280 mW), space-efficient equalizer enabling full 3G-SDI support in thermally constrained enclosures. Use Value: WQFN-16 package and single 3.3-V supply reduce PCB area and BOM count versus multi-rail alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SDI equalizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH0384SQ/NOPB | Same WQFN-16 package, but supports only up to 1.485 Gbps (HD-SDI); lacks 3G-SDI equalization capability. | Suitable for HD-only infrastructure; cannot replace LMH0344SQ/NOPB in 3G-SDI or DVB-ASI 270 Mbps systems. | Select LMH0384SQ/NOPB only when 3G-SDI support is unnecessary and cost optimization is prioritized. |
| GS2974B | Pin-compatible replacement per TI documentation; identical 3G-SDI performance and feature set; different manufacturer (Semtech). | No change in system functionality or layout required; same SMPTE compliance and cable reach specifications. | GS2974B serves as a documented second-source option where Semtech supply chain alignment is preferred. |
Compared with LMH0344SQ/NOPB, LMH0384SQ/NOPB trades 3G-SDI capability for lower cost in HD-only systems, while GS2974B offers identical 3G-SDI functionality with alternate sourcing - neither requires PCB redesign, but only GS2974B maintains full functional equivalence across all data rates and features.
Availability
LMH0344SQ/NOPB is available at Aetrix Electronics and suitable for broadcast infrastructure, professional video routing, and OEM monitor design requiring stable component supply, long-lifecycle support, and SMPTE-compliant signal integrity.
Supply support for LMH0344SQ/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 company specializing in analog, embedded processing, and connectivity technologies, with leadership in high-speed interface solutions for professional video and communications.
The LMH0344SQ/NOPB belongs to TI's LMH high-speed SDI equalizer product line, engineered specifically for SMPTE-compliant serial digital video transport in broadcast, production, and post-production environments.
FAQ
What is the maximum cable length LMH0344SQ/NOPB can equalize at 2.97 Gbps?
The LMH0344SQ/NOPB equalizes up to 120 meters of Belden 1694A coaxial cable at 2.97 Gbps while maintaining ≤0.3 UI output jitter and meeting SMPTE ST 424 compliance. This performance assumes proper AC-coupling (1-µF X7R), 75-Ω impedance control, and correct MUTEREF configuration. Longer runs require signal regeneration or fiber conversion.
Does LMH0344SQ/NOPB support both SD-SDI and 3G-SDI standards?
Yes, LMH0344SQ/NOPB supports ST 259 (SD-SDI), ST 292 (HD-SDI), ST 344 (HD-SDI), and ST 424 (3G-SDI), plus DVB-ASI at 270 Mbps. Its 125 Mbps–2.97 Gbps adaptive range covers all major SMPTE serial digital video formats in a single device, eliminating need for multiple equalizer variants.
Can LMH0344SQ/NOPB operate with single-ended input signals?
Yes, LMH0344SQ/NOPB accepts either differential or single-ended AC-coupled inputs. For single-ended use, connect SDI to the true input and terminate the complement input (SDI) to VEE via 75 Ω. Input swing must remain within 720–950 mVP–P, and transformer coupling is explicitly unsupported per datasheet.
What is the function of the AEC+ and AEC− pins on LMH0344SQ/NOPB?
The AEC+ and AEC− pins on LMH0344SQ/NOPB connect to an external 1-µF capacitor that sets the loop dynamics of the adaptive equalizer. This capacitor controls convergence speed and bandwidth adjustment in response to cable loss variations. Incorrect capacitance causes instability or slow adaptation - TI specifies 1 µF ±10% X7R ceramic for optimal performance.
Is LMH0344SQ/NOPB pin-compatible with other TI SDI equalizers?
Yes, LMH0344SQ/NOPB shares the same 16-pin WQFN (4 mm × 4 mm) footprint with LMH0044, LMH0384, and LMH0074. This enables drop-in replacement in existing HD-SDI designs when upgrading to 3G-SDI, provided power delivery, layout, and firmware accommodate the extended data rate and updated feature set.
LMH0344SQ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Data Transport
- Interface:
- Serial
- Voltage - Supply:
- 3.135V ~ 3.465V
- Supplier Device Package:
- 16-WQFN (4x4)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
LMH0344SQ/NOPB FAQ
1.How can I place an order for LMH0344SQ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH0344SQ/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 LMH0344SQ/NOPB reliable?
The price and inventory of LMH0344SQ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH0344SQ/NOPB is usually 5 days.
3.What payment methods are accepted for LMH0344SQ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH0344SQ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH0344SQ/NOPB?
LMH0344SQ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH0344SQ/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 LMH0344SQ/NOPB?
For technical support, including LMH0344SQ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH0344SQ/NOPB requirements.
6.How does Aetrix verify that LMH0344SQ/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH0344SQ/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 LMH0344SQ/NOPB meets industry standards.
7.What is the process for return or replacement of LMH0344SQ/NOPB?
All LMH0344SQ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH0344SQ/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 LMH0344SQ/NOPB part is unused and in its original packaging.
Return procedure for LMH0344SQ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMH0344SQ/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…
