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Texas Instruments TMDS181RGZR
- Part No.:
- TMDS181RGZR
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
TMDS181RGZR.pdf
- Description:
- IC INTERFACE SPECIALIZED 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,093
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Product details
Overview
TMDS181RGZR from Texas Instruments is a 6 Gbps HDMI™ TMDS retimer IC supporting HDMI 2.0a compliance, adaptive or fixed receive equalization (7.5 dB/14 dB), and automatic redriver-to-retimer mode switching at 1.0 Gbps threshold. It features four TMDS differential channels (data + clock), ARC/SPDIF audio return path, dual-power rails (1.2 V VDD / 3.3 V VCC), and operates across 0°C to 85°C for digital TV and monitor applications.
For engineers reviewing the TMDS181RGZR datasheet, TMDS181RGZR pinout, TMDS181RGZR application, or TMDS181RGZR equivalent, this page delivers verified electrical specs, I²C/pin-strapped configuration options, inter-pair skew compensation (5+ bits), fail-safe TMDS output architecture, and real-world HDMI link debugging capabilities including post-EQ eye diagram analysis.
Technical Context
The TMDS181RGZR implements a CDR-based retiming architecture with integrated PLL and SERDES, enabling jitter cleanup on input TMDS streams up to 6 Gbps. Its receiver includes programmable adaptive or fixed equalization (EQ_SEL/A0 strap) and supports intra-pair skew tolerance up to 112 ps and inter-pair skew compensation of ≥5 bits.
It features dual-mode operation: automatic redriver mode below 1.0 Gbps (HDMI 1.4b compliant) and retimer mode above that threshold (HDMI 2.0a capable). Output drive strength is dynamically controlled via VSADJ resistor (4.5–7.06 kΩ) and TX_TERM_CTL pin, delivering compliant TMDS voltage swing (335–1200 mVpp) across data rates from 270 Mbps to 6 Gbps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate Support | Up to 6 Gbps in retimer mode; up to 3.4 Gbps in redriver mode - enables 4k2k60p @ 24 bpp or WUXGA @ 16-bit color depth |
| Input Equalization | Adaptive or fixed (7.5 dB / 14 dB @ 3 GHz) - compensates for loss in long cables or high-loss PCB traces |
| Power Supply | 1.2 V (VDD) + 3.3 V (VCC) dual-rail - reduces total power vs. single-supply alternatives; typical retimer power = 900 mW |
| Skew Compensation | ≥5 bits inter-pair skew correction - maintains timing alignment across all four TMDS lanes for HDMI 2.0 signal integrity |
| Output Voltage Swing | 335–1200 mVpp (VOD) with VSADJ resistor tuning - meets HDMI 2.0 TMDS output compliance across full data rate range |
| Operating Temperature | 0°C to 85°C (extended commercial grade) - validated for digital TV, projector, and AIO monitor thermal environments |
| Package | 48-pin VQFN (7 mm × 7 mm, 0.5 mm pitch) - thermally enhanced for high-speed signal integrity and board-level EMI control |
Pinout & Package
TMDS181RGZR is housed in a 48-pin VQFN package (7.0 mm × 7.0 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are fully defined per TI SLASE75D datasheet Rev D, including dedicated TMDS I/O, DDC/ARC bidirectional interfaces, and configurable control pins for I²C or pin-strap programming.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN_D0p/n to IN_D2p/n, IN_CLKp/n | TMDS differential inputs | Accepts HDMI source signals; supports 75–1560 mVpp input swing and 85–115 Ω termination impedance |
| OUT_D0p/n to OUT_D2p/n, OUT_CLKp/n | TMDS differential outputs | Fail-safe outputs with programmable termination (75–150 Ω) and VSADJ-controlled voltage swing compliance |
| SDA_SRC/SCL_SRC, SDA_SNK/SCL_SNK | DDC bidirectional I²C lines | Supports sink/source-side DDC communication; compatible with standard HDMI DDC protocol (up to 400 kHz) |
| HPD_SRC/HPD_SNK | Hot-plug detect interface | Enables plug-and-play detection between source and sink; HPD_SRC drives 2.4–3.6 V, HPD_SNK accepts 0.8–2.1 V logic |
| EQ_SEL/A0, PRE_SEL, SWAP/POL | Configuration strapping pins | Set receive EQ mode (adaptive/fixed), de-emphasis (–2 dB/0 dB), and lane polarity/swap without I²C bus |
| I2C_EN/PIN, SDA_CTL, SCL_CTL | I²C control interface | Enables full register access for dynamic reconfiguration; addressable at 0xBh (7-bit) with internal pull-down on A1 |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Redriver/Retime Mode Switching | Seamlessly transitions at 1.0 Gbps threshold - eliminates manual mode selection and ensures optimal signal conditioning across HDMI 1.4b/2.0a data rates |
| Post-Equalizer Eye Diagram Debug | On-chip visibility into RX EQ output waveform - accelerates HDMI link validation and channel loss characterization without external test equipment |
| Dual-Rail Power Architecture | Independent 1.2 V (VDD) and 3.3 V (VCC) supplies - reduces active power by ~30% vs. legacy 3.3 V-only retimers while maintaining full 6 Gbps performance |
| ARC/SPDIF Audio Return Channel | Single-ended ARC_OUT and SPDIF_IN support - enables bi-directional audio over HDMI without requiring separate audio interfaces or external converters |
| Inter-Pair Skew Compensation | ≥5-bit deskew capability - corrects timing misalignment between TMDS clock and data lanes caused by PCB trace length mismatch |
Applications
| Digital Television | Ultra HD Monitor |
|---|---|
Use Scenario: HDMI signal extension from SoC to panel connector over 150 mm FR4 PCB traces with >15 dB loss at 3 GHz. IC Role / Device Role / Timing Role: Retimer restoring signal integrity and compensating for board-level jitter accumulation and inter-pair skew. Use Value: Enables stable 4k2k60p transmission where native SoC output would fail HDMI CTS eye mask compliance. |
Use Scenario: Active HDMI cable adapter supporting 6 Gbps bandwidth with embedded re-timing for desktop GPU-to-monitor links. IC Role / Device Role / Timing Role: Fail-safe TMDS retimer with automatic mode switching and ARC passthrough for audio sync. Use Value: Eliminates need for discrete redriver + retimer combo; reduces BOM count and layout area by 40% vs. dual-chip solution. |
| Blu-ray Player | AV Receiver |
Use Scenario: HDMI output stage of Blu-ray player handling multiple resolution formats (1080p/4k) and deep color modes. IC Role / Device Role / Timing Role: Adaptive EQ-enabled retimer ensuring robust signal delivery across variable source output impedances and cable types. Use Value: Maintains HDMI 2.0a compliance across all supported video formats without firmware updates or hardware changes. |
Use Scenario: HDMI switch matrix with integrated retiming to support simultaneous 4k input routing and ARC audio return. IC Role / Device Role / Timing Role: Dual-role device providing both TMDS re-timing and bidirectional DDC/ARC bridging between source and sink ports. Use Value: Enables true HDMI 2.0a feature set (including ARC and EDID pass-through) without external level shifters or I²C multiplexers. |
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 | Industrial-grade variant (–40°C to 85°C); identical electrical specs and pinout | Required for automotive infotainment or industrial displays operating outside 0°C–85°C ambient | Select TMDS181IRGZR when extended temperature qualification is mandatory; otherwise TMDS181RGZR suffices for consumer electronics |
| Parade PS8409B | 4-channel 6 Gbps HDMI retimer with integrated HDCP 2.2 engine; requires external 1.8 V supply | Supports encrypted content paths; adds HDCP processing overhead and higher power (1.2 W typical) | Choose PS8409B only if HDCP 2.2 compliance is required; TMDS181RGZR offers lower cost and simpler power design for non-encrypted links |
Compared with TMDS181IRGZR, the TMDS181RGZR trades industrial temperature range for lower cost and same core retiming functionality; versus PS8409B, it omits HDCP but delivers lower power, simpler supply scheme, and direct pin-strappable configuration - making it optimal for cost-sensitive, non-DRM HDMI 2.0a extension applications.
Availability
TMDS181RGZR is available at Aetrix Electronics and suitable for digital television, ultra HD monitor, Blu-ray player, AV receiver, and active cable applications requiring stable component supply, long-term lifecycle assurance, and full HDMI 2.0a retimer functionality.
Supply support for TMDS181RGZR 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, with decades of HDMI interface IP development and production validation.
The TMDS181RGZR belongs to TI's HDMI retimer product line, engineered specifically for high-fidelity, low-latency video signal restoration in consumer electronics - balancing power efficiency, configurability, and CTS-compliant signal integrity at 6 Gbps.
FAQ
What is the maximum data rate supported by the TMDS181RGZR in retimer mode?
The TMDS181RGZR supports up to 6 Gbps in retimer mode, enabling HDMI 2.0a-compliant transmission of 4k2k60p video at 24 bits per pixel. This maximum rate is validated per TI SLASE75D datasheet Section 6.6, with full electrical compliance including jitter tolerance (≤150 ps), intrapair skew (≤112 ps), and output voltage swing (335–1200 mVpp).
Does the TMDS181RGZR require external configuration or can it operate autonomously?
The TMDS181RGZR operates autonomously in default configuration: it auto-detects data rate and switches between redriver (<1.0 Gbps) and retimer (≥1.0 Gbps) modes. Pin-strapping (e.g., EQ_SEL/A0, PRE_SEL) enables static setup without I²C, while I²C_EN/PIN allows full register control via I²C address 0xBh for dynamic tuning of equalization, de-emphasis, and lane mapping.
How does the TMDS181RGZR handle HDMI hot-plug detection (HPD)?
The TMDS181RGZR provides dedicated HPD_SNK (input) and HPD_SRC (output) pins. HPD_SNK accepts 0.8–2.1 V logic from the sink device, while HPD_SRC actively drives 2.4–3.6 V to the source side. Internal 150–220 kΩ pull-down on HPD_SNK ensures failsafe detection, and the device enters standby when HPD is inactive and no valid clock is present.
Can the TMDS181RGZR be used for ARC (Audio Return Channel) functionality?
Yes - the TMDS181RGZR integrates native ARC support via SPDIF_IN and ARC_OUT pins. It operates in single-ended ARC mode per HDMI 1.4/2.0 specifications, delivering 0.4–0.6 V swing at 3.687–13.517 MHz with 55 Ω termination. ARC is functional in both redriver and retimer modes and coexists with DDC and TMDS signaling without interference.
What thermal management considerations apply to the TMDS181RGZR in a 6 Gbps design?
The TMDS181RGZR has RθJA = 31.1°C/W (VQFN-48) and requires a minimum 4×4 mm² copper pour under its thermal pad for reliable 6 Gbps operation. At full 900 mW dissipation, junction temperature rise is ~28°C above ambient - keeping Tj < 113°C at 85°C case temperature. Layout must include 8+ vias under the pad and avoid routing high-speed traces beneath the IC.
TMDS181RGZR 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
TMDS181RGZR FAQ
1.How can I place an order for TMDS181RGZR through Aetrix?
Please submit a Request for Quotation (RFQ) for TMDS181RGZR 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 TMDS181RGZR reliable?
The price and inventory of TMDS181RGZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMDS181RGZR is usually 5 days.
3.What payment methods are accepted for TMDS181RGZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMDS181RGZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMDS181RGZR?
TMDS181RGZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMDS181RGZR 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 TMDS181RGZR?
For technical support, including TMDS181RGZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMDS181RGZR requirements.
6.How does Aetrix verify that TMDS181RGZR is sourced from the original manufacturer or authorized distributors?
All TMDS181RGZR 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 TMDS181RGZR meets industry standards.
7.What is the process for return or replacement of TMDS181RGZR?
All TMDS181RGZR units undergo pre-shipment inspection (PSI). If there is an issue with TMDS181RGZR, 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 TMDS181RGZR part is unused and in its original packaging.
Return procedure for TMDS181RGZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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