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Texas Instruments LMH0056SQX/NOPB
- Part No.:
- LMH0056SQX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Video Processing
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LMH0056SQX/NOPB.pdf
- Description:
- IC VIDEO RECLOCKER 48WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,548
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Product details
Overview
LMH0056SQX/NOPB from Texas Instruments is a HD/SD SDI reclocker with integrated 4:1 input multiplexer, designed for serial digital video retiming in broadcast and professional video systems. It supports SMPTE 259M (143/270 Mbps) and SMPTE 292M (1.483/1.485 Gbps), operates from a single 3.3V supply, delivers two differential LVPECL-compatible outputs, and features automatic rate detection and lock detect functionality - used in digital video routers, format converters, and DVB-ASI equipment.
For engineers reviewing the LMH0056SQX/NOPB datasheet, LMH0056SQX/NOPB pinout, LMH0056SQX/NOPB application, or LMH0056SQX/NOPB equivalent, key selection criteria include SMPTE-compliant jitter suppression at 1485 Mbps, dual-output flexibility (data + clock), 48-pin WQFN thermal performance, and LVCMOS control interface compatibility with video system timing controllers.
Technical Context
The LMH0056SQX/NOPB implements a PLL-based reclocking architecture with auto-rate detection across four discrete SDI data rates. Its loop bandwidth adapts to input frequency (300 kHz at 270 Mbps, 2.0 MHz at 1485 Mbps), enabling stable lock under varying jitter conditions while suppressing accumulated timing errors in long-haul video links.
It integrates a 4:1 multiplexer controlled by SEL0/SEL1 pins, dual differential CML/LVPECL outputs (SDO and configurable SCO/SDO2), and LVCMOS logic I/O including RATE[1:0], SCO_EN, MUTE, and SD/HD indicator - all operating within −40°C to +85°C industrial temperature range with 360 mW typical power consumption.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Serial Data Rates | 143 Mbps, 270 Mbps, 1.483 Gbps, 1.485 Gbps - fully compliant with SMPTE 259M (A/C) and SMPTE 292M standards |
| Output Jitter (1485 Mbps) | 0.05–0.1 UIP-P - ensures robust eye opening and BER margin in HD-SDI transmission chains |
| Input Jitter Tolerance | >6 UIP-P at 1485 Mbps per SMPTE RP 184 - accommodates degraded cable-received signals |
| Supply Voltage | 3.3 V ±5% - single-rail operation simplifies power design in video processing boards |
| Differential Output Level | 800 mVP-P ±10% into 100 Ω - matches standard SDI receiver input sensitivity and termination |
| Reference Clock | 27 MHz ±50 ppm crystal or LVCMOS input - enables precise PLL synthesis without external VCXO |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade broadcast infrastructure deployment |
| Power Consumption | 360 mW typical - enables dense integration in multi-channel video switchers without forced cooling |
Pinout & Package
The LMH0056SQX/NOPB is housed in a 48-pin WQFN package (RHS0048A) with exposed thermal pad connected to VEE. The package supports high-density PCB layout and efficient heat dissipation in video signal path applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDI0–SDI3 (True/Complement pairs) | Four differential SDI input channels | Accepts SMPTE-compliant LVPECL/CML inputs; selected via SEL0/SEL1 for 4:1 multiplexing |
| SDO (True/Complement) | Primary retimed serial data output | Differential LVPECL-compatible output; drives 100 Ω terminated loads directly |
| SCO/SDO2 (True/Complement) | Configurable secondary output | Switched via SCO_EN between second retimed data or low-jitter data-rate clock (143–1485 MHz) |
| SEL0, SEL1 | Input channel select control | LVCMOS inputs selecting one of four SDI inputs (00→SDI0, 11→SDI3) |
| SCO_EN | Secondary output mode control | LVCMOS input enabling SCO/SDO2 as clock (high) or data (low); internal pull-down default |
| MUTE | Output muting control | Active-low LVCMOS input that forces SDO and SCO/SDO2 to opposite DC levels when asserted |
| LOCK DETECT | PLL lock status indicator | LVCMOS output high when PLL locked to valid SDI rate; used for system synchronization and fault reporting |
| SD/HD | Data rate classification indicator | LVCMOS output high for SD (143/270 Mbps), low for HD (1483/1485 Mbps); registered and valid only during lock |
| XTAL IN/EXT CLK, XTAL OUT | 27 MHz reference interface | Supports parallel-resonant crystal (20 pF load) or external LVCMOS clock; critical for PLL stability |
| LF1, LF2 | PLL loop filter connections | Analog nodes requiring external RC networks to set loop bandwidth per data rate (e.g., 300 kHz or 2 MHz) |
Key Features
| Feature | Design Value |
|---|---|
| Auto-Rate Detection | Identifies incoming SDI data rate (143/270/1483/1485 Mbps) without configuration; acquisition time ≤16 ms |
| Dual Differential Outputs | One fixed SDO + one configurable SCO/SDO2 - enables flexible routing to downstream drivers or clock-synchronous logic |
| Integrated 4:1 Multiplexer | Reduces board space vs. discrete mux + reclocker solutions; eliminates inter-stage signal degradation |
| LVCMOS Control Interface | All control pins (RATE[1:0], SEL[1:0], SCO_EN, MUTE) are LVCMOS-compatible - simplifies FPGA/MCU interfacing |
| Low-Jitter Clock Recovery | Provides 2–3 psRMS serial clock output jitter - suitable for feeding high-speed ADCs or serializer clocks |
| Industrial Temperature Range | Rated for −40°C to +85°C operation - meets reliability requirements for broadcast equipment in uncontrolled environments |
Applications
| Video Router Input Conditioning | DVB-ASI Signal Regeneration |
|---|---|
Use Scenario: Digital video router accepting multiple SDI sources with varying cable lengths and signal integrity. IC Role / Device Role / Timing Role: Reclocker with 4:1 multiplexer selects and cleans one of four incoming SDI streams before distribution. Use Value: Suppresses accumulated jitter from long coax runs, ensuring clean eye diagrams at router output stage and preventing downstream frame sync loss. | Use Scenario: DVB-ASI transport stream regeneration in headend or contribution encoders. IC Role / Device Role / Timing Role: Retimer for 270 Mbps MPEG-2 transport streams, recovering clock and cleaning data for modulator input. Use Value: Maintains bit error rate integrity across cascaded ASI links by eliminating intersymbol interference-induced jitter. |
| HD-SDI Format Converter Interface | Multi-Standard Broadcast Monitor Input |
Use Scenario: Converting between SD-SDI (270 Mbps) and HD-SDI (1485 Mbps) formats in real-time production switchers. IC Role / Device Role / Timing Role: Rate-adaptive reclocker providing stable clock domain crossing and SD/HD indicator output for format-aware logic. Use Value: Enables seamless switching between SD and HD sources by delivering synchronized, low-jitter outputs and explicit rate signaling. | Use Scenario: Professional broadcast monitor accepting mixed SD/HD/3G-SDI inputs from cameras and playback servers. IC Role / Device Role / Timing Role: Input-stage reclocker with lock detect and SD/HD flag, conditioning signals prior to decoding and display processing. Use Value: Guarantees reliable lock acquisition and consistent timing across variable-quality feeds, reducing monitor startup delay and false lock events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SDI reclocking applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH0056SQE/NOPB | Same silicon die, identical WQFN-48 package, same pinout and electrical specs - direct orderable variant with different tape-and-reel packaging (250 pcs vs. 1000 pcs) | No functional difference; differs only in reel quantity and part marking (L056 vs. L056) | Select LMH0056SQE/NOPB for volume procurement where reel size and logistics match production line feeders. |
| LMH0046MT/NOPB | Single-input SDI reclocker (no multiplexer), 48-pin TSSOP package, supports same data rates but lacks SEL/SCO_EN control logic | Suitable for point-to-point reclocking only; cannot replace 4:1 mux functionality in multi-source systems | Choose LMH0046MT/NOPB only when multiplexing is handled upstream and board space allows TSSOP footprint. |
Compared with LMH0056SQX/NOPB, LMH0056SQE/NOPB offers identical performance in a functionally equivalent package, while LMH0046MT/NOPB trades multiplexing capability for simpler control and through-hole assembly - making the former ideal for drop-in replacement and the latter viable only in non-mux SDI paths.
Availability
LMH0056SQX/NOPB is available at Aetrix Electronics and suitable for digital video routers, broadcast monitors, DVB-ASI transmitters, and HD/SD format converters requiring stable component supply across extended product lifecycles.
Supply support for LMH0056SQX/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 for industrial, automotive, and communications markets.
The LMH0056SQX/NOPB belongs to TI's broadcast video interface portfolio, engineered specifically for SMPTE-compliant SDI signal integrity restoration in professional video infrastructure - emphasizing jitter tolerance, multi-standard rate agility, and system-level integration.
FAQ
What video standards does the LMH0056SQX/NOPB support?
The LMH0056SQX/NOPB supports SMPTE 259M (A & C) for SD-SDI at 143 Mbps and 270 Mbps, and SMPTE 292M for HD-SDI at 1.483 Gbps and 1.485 Gbps. It also handles DVB-ASI at 270 Mbps. All supported rates are explicitly confirmed in the SNLS236C datasheet, and the device performs automatic rate detection without manual configuration for these exact standards.
How does the LMH0056SQX/NOPB handle input multiplexing and output configuration?
The LMH0056SQX/NOPB uses SEL0 and SEL1 pins to select one of four differential SDI inputs (SDI0–SDI3) for retiming. Its SCO/SDO2 output is configurable via the SCO_EN pin: logic high enables a low-jitter serial data-rate clock output (143–1485 MHz), while logic low provides a second retimed data output. Both SDO and SCO/SDO2 are muted when the MUTE pin is driven low.
What is the role of the SD/HD output pin on the LMH0056SQX/NOPB?
The SD/HD pin on the LMH0056SQX/NOPB is a registered LVCMOS output indicating the detected data rate: high for SD rates (143/270 Mbps), low for HD rates (1483/1485 Mbps). It is only valid when the PLL is locked (LOCK DETECT = high) and is used to configure downstream devices like cable drivers. During unlock or rate transitions, its state is undefined or defaults to HD (low).
Can the LMH0056SQX/NOPB operate without an external crystal?
No - the LMH0056SQX/NOPB requires a 27 MHz reference clock applied to the XTAL IN/EXT CLK pin. This may be a parallel-resonant crystal (20 pF load, ±50 ppm) connected across XTAL IN and XTAL OUT, or an external LVCMOS-compatible 27 MHz clock source. The device does not contain an internal oscillator and will not function without this reference.
What thermal and packaging specifications apply to the LMH0056SQX/NOPB?
The LMH0056SQX/NOPB uses a 48-pin WQFN package (RHS0048A) with exposed thermal pad electrically connected to VEE. Its thermal resistance is θJA = 26.1°C/W and θJC = 1.9°C/W. The exposed pad must be soldered to a PCB ground plane for mechanical stability and thermal performance. Operating junction temperature is rated to +150°C, with industrial ambient range −40°C to +85°C.
LMH0056SQX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Reclocker
- Applications:
- Professional Video
- Standards:
- DVB-ASI, SMPTE
- Control Interface:
- Serial
- Voltage - Supply:
- 3.135V ~ 3.465V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-WQFN (7x7)
LMH0056SQX/NOPB FAQ
1.How can I place an order for LMH0056SQX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH0056SQX/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 LMH0056SQX/NOPB reliable?
The price and inventory of LMH0056SQX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH0056SQX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH0056SQX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH0056SQX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH0056SQX/NOPB?
LMH0056SQX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH0056SQX/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 LMH0056SQX/NOPB?
For technical support, including LMH0056SQX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH0056SQX/NOPB requirements.
6.How does Aetrix verify that LMH0056SQX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH0056SQX/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 LMH0056SQX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH0056SQX/NOPB?
All LMH0056SQX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH0056SQX/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 LMH0056SQX/NOPB part is unused and in its original packaging.
Return procedure for LMH0056SQX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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