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Texas Instruments LMH1219RTWR
- Part No.:
- LMH1219RTWR
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LMH1219RTWR.pdf
- Description:
- IC INTERFACE SPECIALIZED 24WQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LMH1219RTWR from Texas Instruments is a low-power, dual-input/dual-output adaptive cable and board trace equalizer with integrated reference-less reclocker for SMPTE 12G/6G/3G/HD/SD and 10GbE video-over-IP applications. It supports 11.88 Gbps data rate, delivers 0.11–0.15 UI total jitter at reclocked output, achieves 75 m coaxial reach at 4Kp60 UHD, consumes 250 mW typical power, and operates from single 2.5 V or dual 2.5 V/1.8 V supplies.
For engineers reviewing the LMH1219RTWR datasheet, LMH1219RTWR pinout, LMH1219RTWR application, or LMH1219RTWR equivalent, this page provides verified technical context, real-world signal integrity performance, confirmed power modes, validated input/output termination behavior, and precise reclocker lock-rate mapping across SMPTE and Ethernet standards.
Technical Context
The LMH1219RTWR implements two independent adaptive equalization paths: an extended-reach 75 Ω coaxial cable equalizer on IN0± (supporting 125 Mbps–11.88 Gbps) and an SFF-8431-compliant 100 Ω board trace equalizer on IN1± (supporting SMPTE and 10.3125 Gbps 10GbE). Both inputs feed a shared reference-less reclocker with built-in loop filter and eye monitor.
Its reclocker locks to SMPTE rates (11.88/5.94/2.97/1.485/270 Gbps/Mbps) and 10.3125 Gbps 10GbE without external reference clock, delivers <0.15 UI total jitter at 11.88 Gbps, and provides programmable de-emphasis on both 100 Ω differential outputs (OUT0±/OUT1±) with configurable launch amplitude (410–810 mVp-p).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate Support | 11.88 Gbps (SMPTE 12G), 10.3125 Gbps (10GbE), down to 270 Mbps - enables full UHD/4K/8K/HD/SD video transport in one device. |
| Input Termination | IN0±: 75 Ω with integrated return loss network meeting SMPTE specs; IN1±: 100 Ω differential - eliminates need for external termination components. |
| Output Drive | OUT0±/OUT1±: 100 Ω differential drivers with 4-level programmable VOD_DE (410–810 mVp-p) and de-emphasis - compensates PCB trace loss up to 20 inches. |
| Reclocker Jitter | 0.11–0.15 UI total jitter (BER ≤1e−12) at 11.88 Gbps - ensures robust timing margin in broadcast routers and media gateways. |
| Power Consumption | 250 mW typical (dual supply), 16 mW power-save mode - reduces thermal load in dense video processing chassis. |
| Operating Temp | –40°C to +85°C junction temperature - qualified for industrial broadcast infrastructure environments. |
| Package | 24-pin QFN, 4.0 mm × 4.0 mm - compact footprint compatible with high-density HD/4K video PCB layouts. |
Pinout & Package
LMH1219RTWR is housed in a 4.0 mm × 4.0 mm, 24-pin QFN package (RTW) with exposed thermal pad (EP = VSS). Pin functions are validated per TI SNLS530D Rev D datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN0± (Pins 1,2) | 75 Ω coaxial input pair | Adaptive cable equalizer path for SMPTE video; requires external 4.7 µF AC coupling; supports 75 m @ 11.88 Gbps on Belden 1694A. |
| IN1± (Pins 4,5) | 100 Ω board trace input pair | SFF-8431-compliant path for 10GbE and SMPTE; internal 100 Ω termination; supports 20-inch FR4 traces. |
| OUT0± (Pins 17,18), OUT1± (Pins 14,15) | Differential output drivers | 100 Ω terminated outputs with programmable VOD_DE; support reclocked data fanout or recovered clock output (FCLKOUT). |
| LOCK_N (Pin 12) | Open-drain reclocker lock indicator | Pulled LOW when reclocker achieves lock; 3.3 V tolerant; configurable via register as CD_N or INT_N. |
| VOD_DE (Pin 11) | 4-level driver amplitude control | Selects output swing (410–810 mVp-p) and de-emphasis level for both outputs - sets launch amplitude for downstream trace compensation. |
| MODE_SEL (Pin 6) | Serial interface mode select | Configures SPI (float) or SMBus (1 kΩ to VSS); determines SS_N vs ADDR[1:0] and MISO/MOSI vs SDA/SCL pin assignment. |
| VIN (Pin 24), VDD_LDO (Pin 23) | Power supply inputs | VIN accepts 2.5 V (single supply) or 1.8 V (low-power dual supply); VDD_LDO is LDO output (1.8 V) or input depending on VIN configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Reference-less reclocker | Locks to SMPTE and 10GbE rates without external crystal or reference clock - simplifies system clock tree and reduces BOM count. |
| Integrated eye monitor | Non-disruptive real-time serial data eye measurement - accelerates board bring-up and field debug without external test equipment. |
| 2:1 input mux + 1:2 fanout | Hardware-selectable signal routing between IN0/IN1 and OUT0/OUT1 - enables flexible video signal switching and distribution in routers. |
| Adaptive EQ + reclocker bypass | Independent enable/disable of equalization and reclocking per input - preserves raw signal integrity when reclocking is unnecessary. |
| Low-power operation | 16 mW power-save mode with no input signal - reduces standby power in always-on broadcast infrastructure. |
Applications
| Broadcast Video Router | UHD Media Gateway |
|---|---|
Use Scenario: Aggregating multiple 12G-SDI camera feeds into a centralized routing matrix with minimal latency and jitter accumulation. IC Role / Device Role / Timing Role: Adaptive equalizer and jitter-cleaning reclocker on each input channel, restoring signal integrity after long coax runs. Use Value: Enables 75 m coax reach at 11.88 Gbps while maintaining <0.15 UI total jitter - meets SMPTE ST 2082-1 compliance for 4Kp60 routing. |
Use Scenario: Bridging SMPTE 12G-SDI video streams to 10GbE IP networks in live production trucks or OB vans. IC Role / Device Role / Timing Role: Dual-path signal conditioner: IN0± handles 12G-SDI; IN1± processes 10.3125 Gbps 10GbE; reclocker synchronizes domains. Use Value: Single-chip support for both SMPTE and SFF-8431 protocols eliminates need for separate equalizers - reduces PCB area and design complexity. |
| Digital Video Editing Station | HD/4K Distribution Amplifier |
Use Scenario: Receiving high-bitrate video from capture cards over long backplane traces before feeding FPGA-based processing pipelines. IC Role / Device Role / Timing Role: Board trace equalizer on IN1± compensates for FR4 loss; reclocker cleans jitter introduced by interconnects. Use Value: 20-inch trace equalization capability and 0.106 UI jitter at 5.94 Gbps ensure clean sampling clock for high-fidelity frame reconstruction. |
Use Scenario: Splitting one 12G-SDI source to multiple monitors or recording devices while preserving signal fidelity and timing accuracy. IC Role / Device Role / Timing Role: 1:2 fanout with programmable de-emphasis on OUT0±/OUT1± drives multiple 75 Ω loads simultaneously. Use Value: –6 dB splitter mode and 4-level VOD_DE allow precise amplitude matching across outputs - avoids display sync issues. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adaptive equalizer and reclocker applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH1226RTWR | Pin-compatible 12G reclocker without adaptive equalization; no IN0± cable EQ or IN1± board EQ. | Used where reclocking-only is sufficient and external equalization is handled elsewhere. | Select LMH1226RTWR when signal conditioning is performed upstream and only jitter cleaning is required. |
| LMH0324RTWT | 3G-only adaptive cable equalizer (no reclocker, no 10GbE support, no IN1± path). | Targeted at legacy HD/SDI systems operating ≤2.97 Gbps without IP video requirements. | Choose LMH0324RTWT for cost-sensitive 3G-SDI designs where 12G or 10GbE capability is unnecessary. |
Compared with LMH1219RTWR, LMH1226RTWR offers identical reclocking performance but lacks integrated equalization-requiring external EQ stages-while LMH0324RTWT supports only legacy 3G rates and omits both reclocking and 10GbE functionality, limiting use to non-UHD broadcast endpoints.
Availability
LMH1219RTWR is available at Aetrix Electronics and suitable for broadcast video routers, UHD media gateways, and digital video editing stations requiring stable component supply, long-lifecycle support, and guaranteed SMPTE compliance.
Supply support for LMH1219RTWR 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 and embedded processing technologies, with deep expertise in high-speed signal conditioning and broadcast video solutions.
The LMH1219RTWR belongs to TI's LMH high-speed video interface product line, engineered specifically for SMPTE-compliant UHD infrastructure including routers, switchers, and IP media gateways demanding low jitter, adaptive equalization, and multi-standard interoperability.
FAQ
What data rates does the LMH1219RTWR support for SMPTE and 10GbE applications?
The LMH1219RTWR supports SMPTE 12G (11.88 Gbps), 6G (5.94 Gbps), 3G (2.97 Gbps), HD (1.485 Gbps), and SD (270 Mbps), plus 10.3125 Gbps for 10GbE video-over-IP. These rates are natively locked by its reference-less reclocker without external clock sources, and all are validated per TI SNLS530D datasheet Table 11.
How does the LMH1219RTWR handle power supply configurations?
The LMH1219RTWR supports two modes: single 2.5 V supply (VIN/VDDIO/VDD_CDR = 2.5 V, VDD_LDO internally regulated) or dual 2.5 V/1.8 V supply (VIN/VDD_LDO = 1.8 V, VDDIO/VDD_CDR = 2.5 V). In dual mode, power drops to 16 mW in save mode - confirmed in Electrical Characteristics section 6.5 of the LMH1219RTWR datasheet.
What is the function of the LOCK_N pin on the LMH1219RTWR?
The LOCK_N pin on the LMH1219RTWR is an open-drain LVCMOS output that asserts LOW when the reclocker achieves lock on the selected input (IN0± or IN1±). It is 3.3 V tolerant and requires an external 2–5 kΩ pull-up resistor. Per Pin Functions table, it can be reconfigured via register to indicate carrier detect (CD_N) or interrupt (INT_N).
Can the LMH1219RTWR operate without external loop filter components?
Yes - the LMH1219RTWR integrates the loop filter capacitor for its reclocker, eliminating the need for external passive components. This is explicitly stated in the Features list and confirmed in the Detailed Description section 7.3 of the LMH1219RTWR datasheet, enabling simpler layout and improved reliability in broadcast-grade hardware.
What is the maximum coaxial cable reach supported by the LMH1219RTWR at 4Kp60 UHD?
The LMH1219RTWR supports up to 75 meters of Belden 1694A coaxial cable at 11.88 Gbps (4Kp60 UHD), as specified in the Features section and validated in Electrical Characteristics Table 11 under "Cable Reach." This performance assumes standard launch amplitude and is measured with PRBS-10 pattern and 75 m cable length.
LMH1219RTWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Cable Equalization
- Interface:
- Serial
- Voltage - Supply:
- -
- Supplier Device Package:
- 24-WQFN (4x5)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
LMH1219RTWR FAQ
1.How can I place an order for LMH1219RTWR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH1219RTWR 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 LMH1219RTWR reliable?
The price and inventory of LMH1219RTWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH1219RTWR is usually 5 days.
3.What payment methods are accepted for LMH1219RTWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH1219RTWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH1219RTWR?
LMH1219RTWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH1219RTWR 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 LMH1219RTWR?
For technical support, including LMH1219RTWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH1219RTWR requirements.
6.How does Aetrix verify that LMH1219RTWR is sourced from the original manufacturer or authorized distributors?
All LMH1219RTWR 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 LMH1219RTWR meets industry standards.
7.What is the process for return or replacement of LMH1219RTWR?
All LMH1219RTWR units undergo pre-shipment inspection (PSI). If there is an issue with LMH1219RTWR, 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 LMH1219RTWR part is unused and in its original packaging.
Return procedure for LMH1219RTWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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