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Texas Instruments LMH1219RTWT
- Part No.:
- LMH1219RTWT
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LMH1219RTWT.pdf
- Description:
- IC INTERFACE SPECIALIZED 24WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:428
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Product details
Overview
LMH1219RTWT 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 (4Kp60 UHD), 10.3125 Gbps (10GbE), and sub-rates down to 270 Mbps, delivers 250 mW typical power consumption, and operates across –40°C to +85°C in a 4 mm × 4 mm 24-pin QFN package.
For engineers reviewing the LMH1219RTWT datasheet, LMH1219RTWT pinout, LMH1219RTWT application, or LMH1219RTWT equivalent, this page provides verified technical context, validated pin functions, confirmed reclocking performance at 11.88 Gbps, real-world cable reach data (75 m @ 11.88 Gbps), and accurate alternative part comparisons - all derived from TI's production-grade SNLS530D datasheet.
Technical Context
The LMH1219RTWT implements two independent adaptive equalization paths: an extended-reach 75 Ω coaxial cable equalizer on IN0± (supporting Belden 1694A up to 75 m at 11.88 Gbps) and an SFF-8431–compliant 100 Ω board-trace equalizer on IN1± (optimized for 10 GbE and SMPTE over FR4). Both inputs feed a shared reference-less reclocker with integrated loop filter and Eye Monitor capability.
Its reclocker locks to SMPTE rates (11.88/5.94/2.97/1.485/0.27 Gbps) and 10.3125 Gbps without external reference clock, achieves ≤0.15 UI total jitter at 11.88 Gbps, and offers programmable output de-emphasis via VOD_DE control pins. Power management includes dual-supply mode (2.5 V + 1.8 V) and 16 mW power-save state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rates | 11.88 Gbps (SMPTE 12G), 10.3125 Gbps (10GbE), 5.94–0.27 Gbps sub-rates - enables single-device support for UHD/4K/8K broadcast and IP video gateways. |
| Cable Reach @ 11.88 Gbps | 75 m over Belden 1694A coax - meets SMPTE ST-2082-1 link budget requirements for 4Kp60 routing infrastructure. |
| Power Consumption | 250 mW typical (dual supply), 16 mW in power-save mode - reduces thermal load in dense video router PCBs. |
| Output Jitter (TJ) | 0.11–0.15 UI at 11.88 Gbps - ensures timing margin compliance for downstream CDRs and FPGAs in broadcast systems. |
| Input Termination | 75 Ω single-ended (IN0±), 100 Ω differential (IN1±) - matches SMPTE coax and SFF-8431 board interfaces without external resistors. |
| Package | 24-pin QFN, 4.0 mm × 4.0 mm - enables high-density layout in space-constrained video processing modules. |
| Operating Temperature | –40°C to +85°C - qualified for industrial broadcast equipment operating in uncontrolled rack environments. |
Pinout & Package
LMH1219RTWT is housed in a 4 mm × 4 mm, 24-pin QFN package (RTW) with exposed thermal pad (EP = VSS). Pin assignment follows TI's standardized RTW footprint for signal integrity and thermal management in high-speed video applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN0± (Pins 1, 2) | High-speed analog input | 75 Ω internally terminated SMPTE coax input port with adaptive cable equalization and return-loss network. |
| IN1± (Pins 4, 5) | High-speed analog input | 100 Ω differential SFF-8431–compliant input for 10GbE/FR4 board traces with adaptive trace equalization. |
| OUT0± (Pins 17, 18), OUT1± (Pins 14, 15) | High-speed analog output | Dual 100 Ω differential outputs with programmable de-emphasis; each can be independently disabled via register or control pins. |
| LOCK_N (Pin 12) | Digital status indicator | Open-drain reclocker lock indicator (active-low); configurable via register to report carrier detect or interrupt events. |
| VOD_DE (Pin 11) | 4-level logic input | Selects output amplitude/de-emphasis level (LEVEL-H to LEVEL-L) for both OUT0± and OUT1± drivers. |
| MODE_SEL (Pin 6) | Interface configuration | Sets serial interface mode: LEVEL-F = SPI, LEVEL-L = SMBus; determines ADDR0/ADDR1 strap interpretation. |
| VIN (Pin 24), VDD_LDO (Pin 23), VDD_CDR (Pin 13), VDDIO (Pin 22) | Power domains | VIN accepts 2.5 V or 1.8 V; VDD_LDO is internal 1.8 V LDO output (when VIN = 2.5 V) or input (when VIN = 1.8 V); VDD_CDR powers reclocker; VDDIO powers I/O logic. |
| VSS (Pins 3, 9, 16), EP | Ground reference | Three dedicated ground pins plus exposed thermal pad tied to PCB ground plane - critical for high-frequency return path integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Reference-less reclocker | Locks to SMPTE and 10GbE rates without external crystal or reference clock - eliminates BOM cost and layout complexity for timing sources. |
| Integrated Eye Monitor | Non-disruptive real-time eye diagram measurement - accelerates system 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 distribution in routers and splitters. |
| Programmable de-emphasis | Four-level VOD_DE control adjusts output driver pre-emphasis to compensate for varying PCB trace losses - improves signal integrity at receiver end. |
| On-chip loop filter capacitor | Eliminates need for external loop filter components - reduces component count and saves PCB area in high-density video modules. |
| Signal splitter mode | –6 dB launch amplitude option via IN_OUT_SEL/OUT_CTRL - supports dual-output distribution without external attenuators or splitters. |
Applications
| Broadcast Video Router | UHD Media Gateway |
|---|---|
|
Use Scenario: Signal aggregation and switching of multiple 12G-SDI feeds in a 4K broadcast production truck. IC Role / Device Role / Timing Role: Adaptive equalizer and reclocker restoring signal integrity after long coax runs and crosspoint switching. Use Value: Enables 75 m cable reach at 11.88 Gbps while reducing total jitter to ≤0.15 UI - maintains SMPTE ST-2082-1 compliance across all routed paths. |
Use Scenario: Bridging SMPTE 12G-SDI video streams to 10GbE IP networks in live sports production. IC Role / Device Role / Timing Role: Dual-path equalization (IN0 for coax, IN1 for SFP+ board interface) with reclocked output for FPGA-based media processing. Use Value: Single-chip support for both SMPTE and 10.3125 Gbps rates eliminates need for separate equalizer/reclocker ICs - cuts BOM and layout effort by 50%. |
| Digital Video Editing System | Studio Monitor Interface |
|
Use Scenario: High-bandwidth video capture from camera sources into GPU-accelerated editing workstations. IC Role / Device Role / Timing Role: Input equalization and jitter cleanup before PCIe-based frame grabber ASICs. Use Value: 250 mW typical power enables integration into compact PCIe cards without active cooling - supports fanless workstation designs. |
Use Scenario: Driving multiple 4K monitors from a single video source in broadcast control rooms. IC Role / Device Role / Timing Role: Fanout buffer with programmable de-emphasis to drive parallel display outputs over varied trace lengths. Use Value: VOD_DE control allows per-output optimization - ensures consistent eye opening across 4+ monitor outputs despite trace length mismatches. |
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 |
|---|---|---|---|
| LMH1226RTWT | Pin-compatible 12G UHD reclocker without adaptive equalization; requires external equalizer for long coax runs. | Best suited for short-board applications where equalization is handled upstream or not required. | Select LMH1226RTWT only when reclocking-only functionality suffices and cable equalization is implemented elsewhere. |
| LMH0324RTWT | 3G-SDI adaptive cable equalizer only; no reclocker, no 10GbE support, no IN1± board-trace path. | Limited to HD/SD broadcast infrastructure; cannot support 4Kp60 or IP video gateway use cases. | Choose LMH0324RTWT for legacy HD/SD systems requiring cost-optimized equalization without reclocking or multi-rate flexibility. |
Compared with LMH1219RTWT, LMH1226RTWT trades integrated equalization for lower power and simpler layout, while LMH0324RTWT offers lower-cost 3G-only equalization but lacks reclocking and 12G capability - making LMH1219RTWT the only single-chip solution for full SMPTE 12G/10GbE adaptive equalization and reclocking.
Availability
LMH1219RTWT is available at Aetrix Electronics and suitable for broadcast video routers, UHD media gateways, and digital video editing systems requiring stable component supply, long-lifecycle support, and guaranteed SMPTE 12G compliance.
Supply support for LMH1219RTWT 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 high-speed interface solutions for industrial, automotive, and communications markets.
The LMH1219RTWT belongs to TI's high-speed video interface product line, engineered specifically for SMPTE-compliant broadcast infrastructure and video-over-IP convergence - delivering adaptive equalization, reference-less reclocking, and multi-rate flexibility in a single chip.
FAQ
What data rates does the LMH1219RTWT support?
The LMH1219RTWT supports SMPTE 12G (11.88 Gbps), 6G (5.94 Gbps), 3G (2.97 Gbps), HD (1.485 Gbps), SD (270 Mbps), and 10GbE (10.3125 Gbps), including divide-by-1.001 sub-rates. All rates are supported by its integrated reference-less reclocker, enabling seamless interoperability across legacy and next-generation broadcast and IP video systems without external clock sources.
How does the LMH1219RTWT handle power supply configurations?
The LMH1219RTWT supports both single 2.5 V supply (with internal 1.8 V LDO for core logic) and dual 2.5 V + 1.8 V supply modes. In dual mode, VIN and VDD_LDO connect to 1.8 V, while VDD_CDR and VDDIO use 2.5 V - reducing total power to 250 mW typical. Power-save mode drops consumption to 16 mW when no input signal is present, verified per TI's SNLS530D datasheet.
What is the function of the LOCK_N pin on the LMH1219RTWT?
The LOCK_N pin on the LMH1219RTWT is an open-drain, 3.3 V–tolerant indicator that asserts low when the reclocker achieves lock on the selected input (IN0± or IN1±). It can be reconfigured via register to report carrier detect (CD_N) or interrupt (INT_N) events - providing flexible status monitoring for system firmware without requiring additional GPIO resources.
Can the LMH1219RTWT operate without external loop filter components?
Yes, the LMH1219RTWT integrates the loop filter capacitor internally, eliminating the need for external passive components. This simplifies design, reduces PCB area, and improves consistency across production units - a key advantage confirmed in TI's SNLS530D datasheet Section 7.3 and validated in LMH1219EVM reference designs.
What is the maximum coaxial cable reach supported by the LMH1219RTWT at 12G-SDI?
The LMH1219RTWT supports up to 75 meters over Belden 1694A coaxial cable at 11.88 Gbps (SMPTE ST-2082-1), as specified in TI's SNLS530D datasheet Table 1. This reach is achieved using its adaptive cable equalizer on IN0± and is validated under PRBS-10 pattern conditions with 720 mV launch amplitude - meeting broadcast-grade link budget requirements.
LMH1219RTWT 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
LMH1219RTWT FAQ
1.How can I place an order for LMH1219RTWT through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH1219RTWT 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 LMH1219RTWT reliable?
The price and inventory of LMH1219RTWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH1219RTWT is usually 5 days.
3.What payment methods are accepted for LMH1219RTWT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH1219RTWT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH1219RTWT?
LMH1219RTWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH1219RTWT 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 LMH1219RTWT?
For technical support, including LMH1219RTWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH1219RTWT requirements.
6.How does Aetrix verify that LMH1219RTWT is sourced from the original manufacturer or authorized distributors?
All LMH1219RTWT 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 LMH1219RTWT meets industry standards.
7.What is the process for return or replacement of LMH1219RTWT?
All LMH1219RTWT units undergo pre-shipment inspection (PSI). If there is an issue with LMH1219RTWT, 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 LMH1219RTWT part is unused and in its original packaging.
Return procedure for LMH1219RTWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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