My Inquiry
My Account
Texas Instruments LMH0344SQX/NOPB
- Part No.:
- LMH0344SQX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
LMH0344SQX/NOPB.pdf
- Description:
- IC INTERFACE SPECIALIZED 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,603
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMH0344SQX/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 (dual-link 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, router I/O modules, and video distribution amplifiers.
For engineers reviewing the LMH0344SQX/NOPB datasheet, LMH0344SQX/NOPB pinout, LMH0344SQX/NOPB application, or LMH0344SQX/NOPB equivalent, key selection criteria include its adaptive equalization bandwidth, 3.3-V single-supply operation, WQFN-16 package compatibility with LMH0044/LMH0384 footprints, and support for pathological data patterns per SMPTE RP 178/RP 198.
Technical Context
The LMH0344SQX/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 wander on pathological video sequences, while the carrier detect (CD) and mute logic respond to signal energy thresholds set via MUTEREF voltage.
It accepts AC-coupled single-ended or differential inputs and delivers internally terminated 50-Ω differential outputs (750 mVP–P), with bypass mode disabling both equalization and DC restoration. The device operates across −40°C to +85°C and meets HBM ESD rating of ±8 kV.
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 ST 259, ST 292, ST 344, and ST 424. |
| Max Cable Equalization | 120 m Belden 1694A at 2.97 Gbps - enables long-haul routing in broadcast infrastructure without repeaters. |
| Output Jitter | ≤0.3 UI at 2.97 Gbps - ensures compliance with SMPTE RP 184 timing budgets for reclocking stages. |
| Supply Voltage | 3.3 V ±4.5% - single-rail operation simplifies power design versus dual-supply alternatives. |
| Power Consumption | 280 mW typical - low thermal load suitable for dense video I/O card layouts. |
| Input Return Loss | ≥10 dB from 1.5–3.0 GHz - meets ST 424 receiver impedance requirements when properly laid out. |
| ESD Rating | HBM ±8 kV - robust handling in production and field service environments. |
Pinout & Package
The LMH0344SQX/NOPB is packaged in a 4.00 mm × 4.00 mm, 16-pin WQFN (RUM) with exposed die attach pad (DAP) connected to VEE. This RoHS-compliant, leadless package supports high-speed signal integrity and thermal dissipation in space-constrained video PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDI / SDI | Differential analog input pair | Accepts AC-coupled SDI signals; supports single-ended or differential drive per layout configuration. |
| SDO / SDO | Differential analog output pair | 50-Ω internally terminated; delivers 750 mVP–P differential swing into 75-Ω loads. |
| AEC+ / AEC− | Analog loop filter terminals | Connect external 1-µF capacitor to set adaptive equalizer convergence speed and stability. |
| BYPASS | LVCMOS control input | High disables equalization and DC restoration - used for diagnostics or fixed-gain mode. |
| MUTE / CD / MUTEREF | LVCMOS/analog control interface | Enable automatic muting based on signal energy; MUTEREF voltage sets cable-length-dependent threshold. |
| VCC / VEE / DAP | Power and ground terminals | 3.3-V supply (VCC), ground (VEE), and exposed thermal pad (DAP) tied to VEE plane for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive equalization | Real-time compensation of cable loss up to 120 m @ 2.97 Gbps using AEC-controlled multistage filter. |
| DC restoration | Self-biasing circuit eliminates baseline wander on pathological video patterns (RP 178/RP 198 compliant). |
| Programmable mute | MUTEREF analog input sets precise carrier-detect threshold - enables dynamic muting based on cable degradation. |
| Single 3.3-V supply | Eliminates need for negative or auxiliary rails - reduces BOM count and layout complexity in video systems. |
| WQFN-16 footprint compatibility | Pin- and footprint-compatible with LMH0044, LMH0384, and LMH0074 - enables drop-in upgrades in existing designs. |
Applications
| Broadcast Camera Interface | Video Router Input Stage |
|---|---|
|
Use Scenario: Recover degraded SDI signals from long coaxial runs between camera heads and base stations. IC Role / Device Role / Timing Role: Adaptive equalizer and DC restorer placed immediately after BNC connector to restore eye opening before reclocking. Use Value: Enables 120 m transmission at 2.97 Gbps without signal regeneration, reducing latency and component count. |
Use Scenario: Front-end conditioning for multi-channel SDI router cards handling mixed SD/HD/3G inputs. IC Role / Device Role / Timing Role: Channel-specific equalization and carrier detection to gate invalid inputs before switching fabric. Use Value: Prevents spurious switching due to missing or corrupted signals via CD/MUTE integration. |
| Distribution Amplifier Output | Medical Imaging Video Link |
|
Use Scenario: Boost signal integrity at DA outputs feeding multiple downstream monitors or recorders. IC Role / Device Role / Timing Role: Post-amplification equalization to compensate for output driver and cable losses. Use Value: Maintains SMPTE-compliant jitter and eye mask compliance across all fan-out paths. |
Use Scenario: Reliable transport of uncompressed HD video from MRI/CT scanners to PACS workstations. IC Role / Device Role / Timing Role: Robust signal recovery over medically certified coaxial cabling subject to EMI and flex fatigue. Use Value: HBM ±8 kV ESD rating and industrial temperature range ensure uptime in clinical environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SDI equalizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH0384SQX/NOPB | Same 3-Gbps capability but includes integrated reclocker; higher power (380 mW) and larger CS-BGA package. | Required when jitter cleanup is needed post-equalization; not suitable for pure equalization-only use cases. | Select LMH0384SQX/NOPB only if system-level jitter budget demands retiming - LMH0344SQX/NOPB avoids unnecessary complexity where equalization suffices. |
| GS2974B-INE3 | Legacy Semtech part with fixed-gain architecture; no adaptive AEC loop or programmable MUTEREF. | Limited to static cable lengths; lacks carrier detect muting and DC restoration for pathological data. | GS2974B-INE3 may be used in legacy SDI systems with known short cables, but LMH0344SQX/NOPB provides superior flexibility and SMPTE compliance. |
Compared with LMH0384SQX/NOPB, the LMH0344SQX/NOPB offers lower power, smaller WQFN footprint, and simpler signal path - ideal for front-end equalization without reclocking. Against GS2974B-INE3, it adds adaptive response, DC restoration, and programmable muting - critical for modern 3G-SDI infrastructure requiring dynamic cable compensation.
Availability
LMH0344SQX/NOPB is available at Aetrix Electronics and suitable for broadcast equipment, professional video routers, and medical imaging systems requiring stable component supply, long-lifecycle support, and SMPTE-compliant signal integrity.
Supply support for LMH0344SQX/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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and industrial-grade performance.
The LMH0344SQX/NOPB belongs to TI's high-speed interface product line, engineered specifically for SMPTE-compliant serial digital video transport in broadcast, medical, and pro-AV systems where signal fidelity over coaxial cable is mission-critical.
FAQ
What data rates does the LMH0344SQX/NOPB support?
The LMH0344SQX/NOPB supports serial data rates from 125 Mbps to 2.97 Gbps, covering SMPTE ST 259 (SD), ST 292 (HD), ST 344 (dual-link HD), and ST 424 (3G-SDI). It equalizes up to 400 m of Belden 1694A at 270 Mbps, 140 m at 1.485 Gbps, and 120 m at 2.97 Gbps - making LMH0344SQX/NOPB suitable for full broadcast video hierarchy applications.
How does the AEC+ and AEC− pins function on the LMH0344SQX/NOPB?
The AEC+ and AEC− pins on the LMH0344SQX/NOPB connect to an external 1-µF capacitor that forms the loop filter for the adaptive equalizer's control circuit. This capacitor sets the response time and stability of the automatic gain and bandwidth adjustment. Proper selection and placement of this capacitor directly impact LMH0344SQX/NOPB's ability to track varying cable loss conditions dynamically.
Can the LMH0344SQX/NOPB operate with single-ended input signals?
Yes, the LMH0344SQX/NOPB accepts either differential or single-ended AC-coupled inputs on the SDI/SDI pins. When using single-ended drive, one input is driven while the other is terminated to VEE or biased appropriately. The internal architecture maintains signal integrity regardless of input configuration - a key feature confirmed in LMH0344SQX/NOPB's functional description and application guidelines.
What is the purpose of the MUTEREF pin on the LMH0344SQX/NOPB?
The MUTEREF pin on the LMH0344SQX/NOPB sets the analog threshold for carrier detect (CD) and automatic muting. Applying a voltage between 0 V and ~2.0 V inversely controls the maximum cable length before muting: lower MUTEREF voltages allow longer equalized runs, while higher voltages trigger earlier muting. Leaving MUTEREF unconnected or grounded configures LMH0344SQX/NOPB for maximum equalization depth.
Does the LMH0344SQX/NOPB require external termination resistors on its SDO/SDO outputs?
No, the LMH0344SQX/NOPB integrates 50-Ω termination on each SDO and SDO output, delivering a 750 mVP–P differential signal into standard 75-Ω coaxial loads. External termination is unnecessary - this internal matching simplifies board layout and ensures consistent impedance control, a verified design feature documented in LMH0344SQX/NOPB's DC electrical characteristics and application schematics.
LMH0344SQX/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
LMH0344SQX/NOPB FAQ
1.How can I place an order for LMH0344SQX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH0344SQX/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 LMH0344SQX/NOPB reliable?
The price and inventory of LMH0344SQX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH0344SQX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH0344SQX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH0344SQX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH0344SQX/NOPB?
LMH0344SQX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH0344SQX/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 LMH0344SQX/NOPB?
For technical support, including LMH0344SQX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH0344SQX/NOPB requirements.
6.How does Aetrix verify that LMH0344SQX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH0344SQX/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 LMH0344SQX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH0344SQX/NOPB?
All LMH0344SQX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH0344SQX/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 LMH0344SQX/NOPB part is unused and in its original packaging.
Return procedure for LMH0344SQX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMH0344SQX/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…
