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Texas Instruments TMDS181IRGZT
- Part No.:
- TMDS181IRGZT
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
TMDS181IRGZT.pdf
- Description:
- IC INTERFACE SPECIALIZED 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:777
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Product details
Overview
TMDS181IRGZT from Texas Instruments is a 6 Gbps HDMI™ TMDS retimer IC with integrated CDR, adaptive/fixed receive equalization, inter-pair skew compensation, and dual-power (1.2 V VDD / 3.3 V VCC) operation. It supports HDMI 2.0a up to 4k2k60p/24 bpp and automatically operates as redriver below 1.0 Gbps or retimer above that threshold in digital TV, projector, and active cable applications.
For engineers reviewing the TMDS181IRGZT datasheet, TMDS181IRGZT pinout, TMDS181IRGZT application, or TMDS181IRGZT equivalent, key selection considerations include its 48-pin VQFN package, 6 Gbps retimer capability, HDMI 2.0a compliance, dual-rail power architecture, and I²C/pin-strap programmability for EQ, de-emphasis, and termination control.
Technical Context
The TMDS181IRGZT implements a clock-data recovery (CDR) loop with adaptive or fixed gain equalization on four TMDS differential input lanes (IN_D[2:0]p/n, IN_CLKp/n), enabling jitter cleanup and signal integrity restoration across lossy PCB traces or cables. Its internal PLL locks to incoming TMDS clock frequencies from 25 MHz to 340 MHz and re-times all data lanes synchronously.
It features dual-domain I²C control (local and DDC-side), hot-plug detect (HPD_SRC/HPD_SNK), ARC/SPDIF bidirectional audio return channel support, and failsafe TMDS output drivers with programmable termination (75–150 Ω) and voltage-swing adjustment via VSADJ resistor (4.5–7.06 kΩ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 6 Gbps in retimer mode; auto-switches to redriver mode below 1.0 Gbps for HDMI 1.4b compatibility. |
| Input Equalization | Adaptive or fixed (7.5 dB or 14 dB at 3 GHz) via EQ_SEL/A0 pin strap or I²C register. |
| Output Termination | Programmable near-end termination: 75–150 Ω (TX_TERM_CTL pin or I²C), automatic selection based on data rate. |
| Voltage Rails | Dual-supply: 1.2 V (VDD) for core logic and 3.3 V (VCC) for I/O, reducing total power vs. single-rail solutions. |
| Power Dissipation | 900 mW typical at 6 Gbps retimer operation; drops to 600 mW in redriver mode and 30 mW in power-down (OE = L). |
| Skew Compensation | Inter-pair skew correction up to 5+ bits; intrapair skew tolerance up to 112 ps at 1.6 Gbps. |
| VSADJ Control | Resistor-based TMDS output swing tuning (4.5–7.06 kΩ) sets nominal 500 mV single-ended swing per lane. |
Pinout & Package
TMDS181IRGZT is housed in a 48-pin VQFN package (7.0 mm × 7.0 mm, 0.5 mm pitch) with exposed thermal pad. The package supports industrial temperature range (–40°C to +85°C) and requires standard reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN_D0p/n – IN_D2p/n, IN_CLKp/n | TMDS differential inputs | Accepts HDMI-compliant 75–1560 mVpp differential signals; internal 100 Ω termination with 3.4 V bias. |
| OUT_D0p/n – OUT_D2p/n, OUT_CLKp/n | TMDS differential outputs | Failsafe drivers with programmable swing (via VSADJ) and termination (TX_TERM_CTL); supports HDMI 2.0a VOD range. |
| HPD_SRC / HPD_SNK | Hot-plug detect interface | HPD_SRC drives source-side detection line; HPD_SNK monitors sink-side HPD status for plug/unplug event handling. |
| SDA_SRC/SCL_SRC, SDA_SNK/SCL_SNK | DDC bidirectional I²C channels | Enables independent DDC communication with both source and sink devices; supports local I²C control via SDA_CTL/SCL_CTL. |
| EQ_SEL/A0, PRE_SEL, TX_TERM_CTL, SWAP/POL | Configuration strapping pins | Set receive EQ mode, de-emphasis level, output termination, and lane polarity/swap without I²C-enabling boot-time configuration. |
| VDD (pins 14,23,24,37,48), VCC (pins 13,43) | Power supplies | VDD = 1.2 V for digital core; VCC = 3.3 V for I/O and analog blocks; decoupling required per TI layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| HDMI 2.0a Retimer Mode | Supports 4k2k60p/24 bpp at 6 Gbps with CDR-based jitter cleanup and inter-pair skew compensation. |
| Auto-Mode Selection | Self-configures as redriver (<1.0 Gbps) or retimer (≥1.0 Gbps) without external control-reducing firmware complexity. |
| Dual-Rail Power Architecture | Separate 1.2 V (VDD) and 3.3 V (VCC) rails lower total power by ~30% vs. legacy 3.3 V-only retimers at 6 Gbps. |
| I²C + Pin-Strap Flexibility | All critical functions (EQ, de-emphasis, termination, swap) configurable either at boot (pin strap) or runtime (I²C), enabling field updates and design reuse. |
| ARC/SPDIF Audio Return | Single-ended ARC_OUT and SPDIF_IN pins support HDMI Audio Return Channel with 3.687–13.517 MHz clock compliance and 0.5 V swing. |
Applications
| Home Theater AV Receiver | Digital Projector |
|---|---|
Use Scenario: HDMI signal extension from Blu-ray player to AV receiver over long cables with signal degradation. IC Role / Device Role / Timing Role: TMDS181IRGZT acts as a retimer between source and sink, recovering clock and data, compensating for channel loss and jitter. Use Value: Enables stable 4k2k60p transmission over 15+ meter passive cables by restoring eye opening and reducing bit error rate. | Use Scenario: HDMI input conditioning in high-resolution digital projector with multiple source inputs and internal video processing. IC Role / Device Role / Timing Role: TMDS181IRGZT serves as input interface retimer, aligning TMDS lanes and cleaning jitter before feeding FPGA-based scaler. Use Value: Maintains pixel-perfect timing integrity for WUXGA 16-bit color depth rendering, preventing display artifacts and color banding. |
| Active HDMI Cable Assembly | Industrial Monitor Controller |
Use Scenario: Embedded retimer in USB-C to HDMI active cable supporting 6 Gbps bandwidth and plug-and-play operation. IC Role / Device Role / Timing Role: TMDS181IRGZT provides full HDMI 2.0a compliance including HPD handshake, DDC snoop, and ARC pass-through in compact form factor. Use Value: Eliminates need for external microcontroller by integrating DDC arbitration, HPD routing, and ARC signal conditioning into single IC. | Use Scenario: Video interface module in ruggedized industrial monitor requiring extended temperature operation and ESD robustness. IC Role / Device Role / Timing Role: TMDS181IRGZT functions as fail-safe HDMI receiver front-end with industrial-grade –40°C to +85°C rating and ±2000 V HBM ESD protection. Use Value: Ensures reliable video link in factory automation environments where thermal cycling and electrical noise would disrupt standard consumer-grade retimers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar HDMI retimer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TMDS181IRGZR | Same die, 48-pin VQFN but tape-and-reel packaging (RGZR) vs. cut-tape (RGZT); identical electrical specs and pinout. | No functional difference; RGZR intended for automated SMT assembly, RGZT for prototyping or low-volume hand-soldering. | Select RGZT for evaluation or small-batch builds; RGZR for high-volume production with pick-and-place. |
| Parade Technologies PS8408B | 4-channel 6 Gbps HDMI 2.0 retimer with integrated HDCP 2.2 engine; requires external HDCP keys; higher power (1.2 W typ). | PS8408B adds content protection enforcement; TMDS181IRGZT lacks HDCP and targets non-protected or legacy HDCP 1.4 systems. | Choose TMDS181IRGZT when HDCP is handled upstream or not required; choose PS8408B only if end-to-end HDCP 2.2 compliance is mandatory. |
Compared with TMDS181IRGZT, TMDS181IRGZR offers identical performance in a production-optimized package, while PS8408B adds HDCP 2.2 but increases BOM cost, power, and design complexity-making TMDS181IRGZT optimal for cost-sensitive, non-HDCP HDMI extension designs.
Availability
TMDS181IRGZT is available at Aetrix Electronics and suitable for digital TV, projector, and active cable applications requiring stable component supply, industrial temperature support, and HDMI 2.0a retimer functionality.
Supply support for TMDS181IRGZT 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions across industrial, automotive, and personal electronics markets.
The TMDS181x product line was designed specifically for HDMI signal integrity restoration in space-constrained, thermally demanding video interfaces-emphasizing low-power retiming, flexible configuration, and seamless integration into consumer and professional AV equipment.
FAQ
What is the maximum data rate supported by the TMDS181IRGZT in retimer mode?
The TMDS181IRGZT supports up to 6 Gbps in retimer mode, enabling HDMI 2.0a compliance for 4k2k60p/24 bpp video. It automatically switches to redriver mode below 1.0 Gbps for HDMI 1.4b compatibility. This dual-mode behavior is built into the TMDS181IRGZT silicon and requires no external configuration.
Does the TMDS181IRGZT integrate HDCP functionality?
No, the TMDS181IRGZT does not include HDCP encryption or decryption engines. It is a physical-layer retimer only-handling TMDS signal recovery, equalization, and timing alignment. HDCP must be implemented upstream (source) or downstream (sink); the TMDS181IRGZT passes DDC traffic transparently to enable external HDCP handshaking.
How is TMDS output voltage swing controlled on the TMDS181IRGZT?
TMDS output voltage swing on the TMDS181IRGZT is set by an external VSADJ resistor (nominal 7.06 kΩ to GND), which adjusts the output driver's common-mode voltage and differential amplitude. The device supports 400–600 mV single-ended swing across data lanes, with precise calibration enabled by this resistor network per TI SLASE75D specification.
Can the TMDS181IRGZT operate with only one power supply rail?
No-the TMDS181IRGZT requires two independent supplies: 1.2 V on VDD pins (for core logic) and 3.3 V on VCC pins (for I/O and analog circuitry). Both rails must be present and within specification (VDD: 1.1–1.27 V; VCC: 3.135–3.465 V) for proper operation. Omitting either rail will prevent functional initialization of the TMDS181IRGZT.
What is the purpose of the SWAP/POL pin on the TMDS181IRGZT?
The SWAP/POL pin on the TMDS181IRGZT controls input lane mapping and polarity inversion: logic high swaps polarity (retimer mode only), logic low swaps lane order (redriver or retimer), and open/no-connect enables normal operation. This allows board-level flexibility to correct routing mismatches without redesigning PCB layer stackup-directly impacting how the TMDS181IRGZT interprets incoming TMDS channel sequence.
TMDS181IRGZT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Retimer
- Interface:
- -
- Voltage - Supply:
- 1.2V, 3.3V
- Supplier Device Package:
- 48-VQFN (7x7)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
TMDS181IRGZT FAQ
1.How can I place an order for TMDS181IRGZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TMDS181IRGZT 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 TMDS181IRGZT reliable?
The price and inventory of TMDS181IRGZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMDS181IRGZT is usually 5 days.
3.What payment methods are accepted for TMDS181IRGZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMDS181IRGZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMDS181IRGZT?
TMDS181IRGZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMDS181IRGZT 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 TMDS181IRGZT?
For technical support, including TMDS181IRGZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMDS181IRGZT requirements.
6.How does Aetrix verify that TMDS181IRGZT is sourced from the original manufacturer or authorized distributors?
All TMDS181IRGZT 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 TMDS181IRGZT meets industry standards.
7.What is the process for return or replacement of TMDS181IRGZT?
All TMDS181IRGZT units undergo pre-shipment inspection (PSI). If there is an issue with TMDS181IRGZT, 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 TMDS181IRGZT part is unused and in its original packaging.
Return procedure for TMDS181IRGZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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