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Texas Instruments LMH0040SQX/NOPB
- Part No.:
- LMH0040SQX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LMH0040SQX/NOPB.pdf
- Description:
- IC INTERFACE SPECIALIZED 48WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,566
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Product details
Overview
LMH0040SQX/NOPB from Texas Instruments is a 1.485 Gbps SMPTE 259M-C/292M/424M and DVB-ASI compliant SDI serializer with integrated LVDS-to-serial cable driver, 5-bit LVDS parallel interface, SMBus configuration, and on-chip TXCLK PLL for clock noise cleaning. It operates from 3.3V and 2.5V supplies, delivers 800 mVpp into 75 Ω, and targets HD video transmission in broadcast-grade equipment.
For engineers reviewing the LMH0040SQX/NOPB datasheet, LMH0040SQX/NOPB pinout, LMH0040SQX/NOPB application, or LMH0040SQX/NOPB equivalent, this page provides verified functional identity, exact pin roles, real-world timing compliance (SMPTE 292M/424M), confirmed power dissipation (440 mW at 1.485 Gbps), and validated alternatives for HD-SDI FPGA-attach designs.
Technical Context
The LMH0040SQX/NOPB implements a parallel-to-serial 5:1 conversion with bypassable 8b10b encoding, accepting DDR LVDS data (TX[4:0]±, TXCLK±) and generating a CML-compatible serial output (TXOUT±) compliant with SMPTE 424M (HD/3G), SMPTE 292M (HD), SMPTE 259M-C (SD), and DVB-ASI standards. Its integrated PLL locks to the incoming LVDS clock without external VCO or reference.
Configuration and status are managed via a 3.3V SMBus interface (SCK/SDA/SMB_CS) supporting register-level control of DVB_ASI mode, GPIO[2:0], output amplitude (via RSET), and lock monitoring (LOCK pin). The device uses internal 100 Ω LVDS termination and requires external loop filter components (LF_CP/LF_REF) and 22 μF PLL bypass capacitor on VDDPLL.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Serial Data Rate | Up to 1.485 Gbps - supports SMPTE 292M HD-SDI and DVB-ASI at full rate |
| Output Amplitude | 800 mVpp into 75 Ω - meets SMPTE 259M/292M/424M output swing requirements |
| Output Jitter | 30 ps peak-to-peak (HD, 1.485 Gbps) - complies with SMPTE RP184 alignment jitter spec |
| Power Dissipation | 440 mW typical at 1.485 Gbps - enables thermal management in dense video PCB layouts |
| LVDS Input Termination | Internal 100 Ω differential - eliminates need for external termination resistors on FPGA interface |
| Operating Temperature | −40°C to +85°C - qualified for industrial and broadcast equipment environments |
| SMBus Interface | 3.3V LVCMOS, 10–100 kHz - enables runtime reconfiguration without FPGA logic changes |
Pinout & Package
LMH0040SQX/NOPB is housed in a 48-pin WQFN package (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad (DAP = GND). Pin mapping is validated per TI SNLS271I Rev. April 2013.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TX[4:0]± | LVDS data input (5-channel DDR) | Accepts parallel video data from FPGA; internal 100 Ω termination reduces layout complexity |
| TXCLK± | LVDS clock input (DDR) | Provides timing reference for serialization; drives on-chip PLL for jitter cleaning |
| TXOUT± | CML serial output | Drives 75 Ω coaxial cable directly when terminated to 2.5V; meets SMPTE return loss specs |
| SMB_CS, SCK, SDA | SMBus configuration interface | Enables dynamic mode selection (DVB_ASI vs. SMPTE), GPIO control, and amplitude tuning |
| LOCK | LVCMOS PLL lock indicator | Active-low signal confirms stable serial output clock; critical for system sync validation |
| RESET | LVCMOS hardware reset | Asynchronous active-low reset; restores default register state and restarts PLL acquisition |
| RSET | Analog amplitude control | Resistor-to-ground sets output swing (e.g., 8.06 kΩ → 800 mVpp); enables calibration |
| VDD3V3 / VDD2V5 / VDDPLL / GND | Power supply pins | Dual-rail operation (3.3V I/O/SMBus, 2.5V core, 3.3V PLL); DAP must be soldered to PCB ground |
Key Features
| Feature | Design Value |
|---|---|
| No external VCO or clock reference required | On-chip PLL synthesizes serial clock from LVDS parallel clock, reducing BOM count and board space |
| Bypassable 8b10b encoding | Configurable via SMBus to support DVB-ASI (enabled) or SMPTE (bypassed), enabling dual-standard flexibility |
| Integrated variable-output cable driver | Meets SMPTE 424M/292M/259M-C eye diagram and return loss specs without external drivers |
| 3.3V SMBus configuration interface | Allows runtime switching between video standards, GPIO reassignment, and output amplitude tuning |
| Industrial temperature range (−40°C to +85°C) | Validated for continuous operation in broadcast encoders, cameras, and switchers deployed in uncontrolled environments |
Applications
| HD Video Camera Interface | DVR Recording Channel |
|---|---|
Use Scenario: Capturing uncompressed 1080p60 video from CMOS sensor and transmitting over coaxial cable to recording unit. IC Role / Device Role / Timing Role: Serializer converts FPGA-processed 5-bit LVDS pixel stream into SMPTE 292M-compliant serial bitstream with sub-30 ps jitter. Use Value: Enables direct connection to SDI monitors/recorders without level-shifting or retiming; 800 mVpp output ensures >100 m cable reach. |
Use Scenario: Aggregating multiple HD video inputs into a multi-channel DVR chassis with centralized storage. IC Role / Device Role / Timing Role: Parallel-to-serial conversion with DVB_ASI mode support allows flexible ingest of broadcast streams alongside native SMPTE sources. Use Value: SMBus-configurable DVB_ASI mode eliminates need for separate ASI receivers; single-footprint design simplifies BOM across input types. |
| Live Video Switcher Input | Video Editing System Capture |
Use Scenario: Feeding real-time HD feeds from multiple cameras into a production switcher with frame-accurate routing. IC Role / Device Role / Timing Role: Low-latency serializer (9.5 TXCLK cycles propagation delay) preserves timing integrity for genlock and lip-sync. Use Value: LOCK pin provides hardware-asserted PLL lock confirmation before switching, preventing black-frame artifacts during source transitions. |
Use Scenario: Capturing high-fidelity HD footage from field recorders into non-linear editing workstations via SDI capture cards. IC Role / Device Role / Timing Role: Output return loss ≥15 dB (5–1485 MHz) ensures clean signal integrity for error-free frame capture at 1.485 Gbps. Use Value: Meets SMPTE 424M compliance out-of-box, eliminating post-layout SI tuning effort for PCIe-based capture hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SDI serializer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH0070SQX/NOPB | Supports only 270 Mbps (SD-SDI); no SMPTE 292M/424M compliance; lower power (400 mW) | Limited to standard-definition broadcast gear; not suitable for HD/3G workflows | Select when cost-sensitive SD-only systems require identical pinout and SMBus interface |
| LMH0340SQX/NOPB | Full 2.97 Gbps (3G-SDI) support; same 48-pin WQFN; higher power (545 mW typ) | Required for 1080p60/4Kx2K 2SI transport; backward-compatible with HD/SD modes | Choose for future-proof 3G-SDI infrastructure where LMH0040SQX/NOPB's 1.485 Gbps limit is insufficient |
Compared with LMH0070SQX/NOPB, LMH0040SQX/NOPB adds HD-SDI capability at modest power increase; compared with LMH0340SQX/NOPB, it trades 3G support for lower power and cost in HD-only deployments-enabling precise tiered sourcing across SD/HD/3G video product lines.
Availability
LMH0040SQX/NOPB is available at Aetrix Electronics and suitable for HD video cameras, DVR recording channels, live video switchers, and video editing system capture requiring stable component supply and SMPTE-compliant serialization.
Supply support for LMH0040SQX/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 solutions for industrial, automotive, and communications markets.
The LMH0040SQX/NOPB belongs to TI's FPGA-Attach SER/DES family, designed specifically to simplify high-speed video interface between FPGAs and SMPTE/DVB-ASI physical layers in broadcast and professional AV equipment.
FAQ
What video standards does the LMH0040SQX/NOPB support?
The LMH0040SQX/NOPB supports SMPTE 259M-C (SD-SDI), SMPTE 292M (HD-SDI), SMPTE 424M (3G-SDI Level A), and DVB-ASI standards. It operates up to 1.485 Gbps, making it fully compliant with HD-SDI and DVB-ASI but not 3G-SDI Level B (2.97 Gbps). All supported standards are validated per TI SNLS271I datasheet Table 1.
Does the LMH0040SQX/NOPB require an external clock source or VCO?
No, the LMH0040SQX/NOPB does not require an external VCO or clock reference. Its integrated TXCLK PLL cleans jitter from the incoming LVDS parallel clock (TXCLK±) and generates the precise serial bit clock. External components are limited to loop filter (LF_CP/LF_REF) and 22 μF VDDPLL bypass capacitor-no crystal or oscillator needed.
How is output amplitude controlled on the LMH0040SQX/NOPB?
Output amplitude on the LMH0040SQX/NOPB is set by an external resistor (RSET) connected from pin 14 to ground. A nominal 8.06 kΩ resistor yields 800 mVpp into 75 Ω, meeting SMPTE standards. The relationship is monotonic and documented in Figure 8 of the datasheet-adjusting RSET allows fine-tuning for specific cable lengths or receiver sensitivity.
Can the LMH0040SQX/NOPB operate in DVB-ASI mode and SMPTE mode interchangeably?
Yes, the LMH0040SQX/NOPB supports runtime switching between DVB-ASI and SMPTE modes via the DVB_ASI pin (Pin 6) or SMBus register control. When DVB_ASI = HIGH, TX4± acts as data valid and TX0–TX3 feed an 8b10b encoder; when LOW, full 5-bit serialization applies. This dual-mode capability is confirmed in the Functional Description section of SNLS271I.
What is the purpose of the LOCK pin on the LMH0040SQX/NOPB?
The LOCK pin (Pin 31) is an LVCMOS output that goes LOW when the internal PLL achieves and maintains lock to the TXCLK input. It provides hardware-observable confirmation of stable serial output-critical for system initialization, fault detection, and genlock synchronization in broadcast equipment. Its behavior is defined in the PIN DESCRIPTIONS table of SNLS271I.
LMH0040SQX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Displays
- Interface:
- LVDS
- Voltage - Supply:
- 3.135V ~ 3.465V
- Supplier Device Package:
- 48-WQFN (7x7)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
LMH0040SQX/NOPB FAQ
1.How can I place an order for LMH0040SQX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH0040SQX/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 LMH0040SQX/NOPB reliable?
The price and inventory of LMH0040SQX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH0040SQX/NOPB is usually 5 days.
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4.How is shipping managed for LMH0040SQX/NOPB?
LMH0040SQX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH0040SQX/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 LMH0040SQX/NOPB?
For technical support, including LMH0040SQX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH0040SQX/NOPB requirements.
6.How does Aetrix verify that LMH0040SQX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH0040SQX/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 LMH0040SQX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH0040SQX/NOPB?
All LMH0040SQX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH0040SQX/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 LMH0040SQX/NOPB part is unused and in its original packaging.
Return procedure for LMH0040SQX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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