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Texas Instruments TMDS181IRGZR
- Part No.:
- TMDS181IRGZR
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
TMDS181IRGZR.pdf
- Description:
- IC INTERFACE SPECIALIZED 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,203
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Product details
Overview
TMDS181IRGZR from Texas Instruments is a 6 Gbps HDMI™ TMDS retimer IC supporting HDMI 2.0a compliance, four-channel differential TMDS signal regeneration, adaptive or fixed receive equalization (7.5 dB/14 dB/adaptive), and integrated ARC/SPDIF audio return channel. It operates with dual supplies (1.2 V VDD / 3.3 V VCC) and supports 4k2k60p at 24 bpp in retimer mode for digital TV and projector applications.
For engineers reviewing the TMDS181IRGZR datasheet, TMDS181IRGZR pinout, TMDS181IRGZR application, or TMDS181IRGZR equivalent, this page delivers verified specifications including 6 Gbps retimer operation, 48-pin VQFN package, HDMI-compliant DDC/HPD/ARC interface support, inter-pair skew compensation, and I²C/pin-strap configuration - all critical for HDMI signal integrity design in high-resolution AV systems.
Technical Context
The TMDS181IRGZR implements a CDR-based retimer architecture with integrated PLL, SERDES, and data registers to reconstruct jittered TMDS streams up to 6 Gbps. Its receiver includes programmable fixed or adaptive equalization per channel (IN_D[2:0]p/n, IN_CLKp/n), while transmitter output supports HDMI-compliant voltage swing control via VSADJ resistor and TX_TERM_CTL–controlled termination (75–150 Ω).
It features dual-domain control: I²C (SDA_CTL/SCL_CTL) and pin-strapped configuration (EQ_SEL/A0, PRE_SEL, SWAP/POL) for HDMI 2.0a vs. HDMI 1.4b mode selection, de-emphasis tuning, polarity/lane swap, and ARC/SPDIF routing. The device automatically switches between redriver (<1.0 Gbps) and retimer (>1.0 Gbps) modes based on input data rate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 6 Gbps in retimer mode; supports 4k2k60p @ 24 bpp and WUXGA @ 16-bit color depth |
| Supply Voltages | 1.2 V (VDD) and 3.3 V (VCC); enables low-power operation with separate analog/digital rail optimization |
| Input Equalization | Configurable via EQ_SEL/A0: 7.5 dB fixed, 14 dB fixed, or adaptive (2–15 dB range) |
| Output Termination | TX_TERM_CTL selects no termination, ~75–150 Ω, or auto-select based on data rate (2–6 Gbps) |
| VSADJ Control | 7.06 kΩ resistor sets TMDS-compliant output voltage swing (400–600 mV single-ended) |
| Operating Temperature | –40°C to +85°C (industrial grade, confirmed by TMDS181I suffix in part number) |
| Package | 48-pin VQFN (RGZ), 7 mm × 7 mm, 0.5 mm pitch - optimized for HDMI PCB layout density |
Pinout & Package
TMDS181IRGZR uses a 48-pin VQFN (RGZ) package with exposed thermal pad. Pin functions are validated per TI SLASE75D datasheet Rev D, including dedicated TMDS input/output differential pairs, dual DDC (source/sink), HPD signaling, ARC/SPDIF I/O, and configurable control pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN_D[2:0]p/n, IN_CLKp/n | TMDS differential inputs | Accepts jittered HDMI signals up to 6 Gbps; feeds adaptive/fixed EQ and CDR block |
| OUT_D[2:0]p/n, OUT_CLKp/n | TMDS differential outputs | Retimed, low-jitter outputs with programmable swing (VSADJ) and termination (TX_TERM_CTL) |
| SDA_SRC/SCL_SRC, SDA_SNK/SCL_SNK | DDC bidirectional I²C interfaces | Enables independent source/sink DDC communication without bus contention |
| HPD_SRC/HPD_SNK | Hot-plug detect I/O | Supports bidirectional hot-plug signaling between HDMI source and sink devices |
| ARC_OUT/SPDIF_IN | Audio return channel I/O | Single-ended ARC output compliant with HDMI 2.0a; SPDIF input for legacy audio path |
| EQ_SEL/A0, PRE_SEL, SWAP/POL | Configuration strap pins | Set receive EQ mode, de-emphasis level, and lane polarity/swap without I²C traffic |
| I2C_EN/PIN, SDA_CTL, SCL_CTL | I²C control interface | Enables full register-level configuration including HDMI 2.0a feature enablement and debug |
Key Features
| Feature | Design Value |
|---|---|
| 6 Gbps Retimer with CDR | Reconstructs TMDS clock and data from highly jittered inputs, enabling long-cable or backplane HDMI links |
| Adaptive Receive Equalization | Compensates for frequency-dependent loss in PCB traces or cables up to 15 dB gain at 3 GHz |
| Dual DDC Ports (Source/Sink) | Eliminates need for external I²C multiplexing; allows simultaneous EDID read/write from both sides of HDMI link |
| HDMI 2.0a Compliance Support | Validated for 4k2k60p timing, ARC, and HDCP-ready signaling paths per HDMI specification |
| Inter-Pair Skew Compensation | Corrects up to 5+ bits of inter-pair skew across TMDS channels, preserving pixel alignment |
Applications
| Digital Television | Ultra HD Projector |
|---|---|
|
Use Scenario: HDMI signal extension from SoC to panel connector over >15 cm PCB trace with impedance discontinuities. IC Role / Device Role / Timing Role: TMDS181IRGZR acts as a retimer to recover clock and data, suppress random jitter, and re-drive clean TMDS signals to display interface. Use Value: Enables stable 4k2k60p transmission despite board-level signal degradation, avoiding pixel corruption or frame drops. |
Use Scenario: HDMI 2.0a source connection to DLP/LCoS projector engine requiring precise TMDS eye opening at 6 Gbps. IC Role / Device Role / Timing Role: TMDS181IRGZR provides adaptive equalization and inter-pair skew correction to maintain HDMI 2.0a eye mask compliance. Use Value: Guarantees >30% eye height at receiver input after 10-inch flex cable, meeting CTS test requirements. |
| Active HDMI Cable Assembly | AV Receiver with ARC |
|
Use Scenario: Embedded retimer in active HDMI cable to compensate for 3-meter passive copper loss at 6 Gbps. IC Role / Device Role / Timing Role: TMDS181IRGZR operates in retimer mode with fixed 14 dB EQ to restore signal integrity before output driver stage. Use Value: Achieves HDMI 2.0 certification for active cables up to Category 2 (18 Gbps aggregate bandwidth). |
Use Scenario: Bidirectional audio transport between TV and soundbar using HDMI ARC over same physical link. IC Role / Device Role / Timing Role: TMDS181IRGZR routes SPDIF_IN to ARC_OUT while maintaining TMDS video path integrity and DDC coordination. Use Value: Enables single-cable audio return without compromising video bandwidth or introducing latency in audio path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar HDMI retimer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TMDS182IRGZR | Higher power consumption (1.1 W typ), adds spread-spectrum clocking and enhanced ESD (±8 kV HBM), same pinout and register map | Required for designs needing stricter EMC compliance or higher robustness in industrial environments | Select TMDS182IRGZR when system-level EMI testing fails with TMDS181IRGZR or when >8 kV HBM protection is mandated |
| Parade PS8409B-VFQ | 4-channel 6 Gbps retimer with integrated HDCP 2.2 engine; requires external 1.8 V supply; 40-pin QFN | Used where content protection is mandatory (e.g., commercial signage, broadcast monitors) | Choose PS8409B-VFQ only if HDCP 2.2 licensing and enforcement are required; not drop-in compatible due to different pin count and supply scheme |
Compared with TMDS181IRGZR, TMDS182IRGZR offers enhanced ESD and spread-spectrum capability in identical packaging, while PS8409B-VFQ adds HDCP but demands redesign for power and layout - making TMDS181IRGZR optimal for cost-sensitive, non-HDCP HDMI 2.0a retiming where industrial temperature and dual DDC are key.
Availability
TMDS181IRGZR is available at Aetrix Electronics and suitable for digital television, ultra HD projector, active HDMI cable, and AV receiver applications requiring stable component supply, industrial-grade temperature operation (–40°C to +85°C), and HDMI 2.0a signal integrity assurance.
Supply support for TMDS181IRGZR 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 specializing in analog, embedded processing, and connectivity technologies, with leadership in high-speed interface solutions for consumer and industrial markets.
The TMDS181IRGZR belongs to TI's HDMI retimer product line, designed specifically for high-fidelity video signal restoration in 4k/60p HDMI 2.0a systems where jitter tolerance, equalization flexibility, and dual-domain DDC control are essential.
FAQ
What is the maximum supported data rate for TMDS181IRGZR in retimer mode?
The TMDS181IRGZR supports up to 6 Gbps per TMDS channel in retimer mode, enabling full HDMI 2.0a compliance including 4k2k60p at 24 bits per pixel. This is confirmed in the SLASE75D datasheet Section 6.6, where DR_RX_DATA_R(T) is specified as 6 Gbps maximum under retimer operation conditions.
Does TMDS181IRGZR support both HDMI 1.4b and HDMI 2.0a standards?
Yes, TMDS181IRGZR supports both standards: it operates as a redriver below 1.0 Gbps (HDMI 1.4b compliant up to 3.4 Gbps) and as a retimer above that threshold (HDMI 2.0a compliant up to 6 Gbps). Mode selection is automatic based on input data rate, and HDMI 2.0a features like ARC and enhanced skew compensation are enabled via I²C or pin strapping.
How is TMDS181IRGZR configured for adaptive versus fixed receive equalization?
TMDS181IRGZR uses the EQ_SEL/A0 pin for receive EQ configuration: logic low selects 7.5 dB fixed gain, logic high selects 14 dB fixed gain, and no-connect enables adaptive EQ (2–15 dB range). This setting applies to all three TMDS data lanes and the clock lane, and is validated in Table 5 of the SLASE75D datasheet under "Pin Functions".
What package type and thermal characteristics does TMDS181IRGZR use?
TMDS181IRGZR uses a 48-pin VQFN (RGZ) package measuring 7 mm × 7 mm with 0.5 mm pitch and an exposed thermal pad. Its thermal resistance is RθJA = 31.1°C/W and RθJB = 8.1°C/W, allowing reliable operation at 85°C case temperature under full 6 Gbps load, as specified in Section 6.4 of the official datasheet.
Can TMDS181IRGZR be used in systems requiring dual DDC communication (source and sink)?
Yes, TMDS181IRGZR integrates separate SDA_SRC/SCL_SRC and SDA_SNK/SCL_SNK pins, enabling concurrent DDC communication with both HDMI source and sink devices. This eliminates external I²C multiplexers and supports real-time EDID exchange and HDCP handshaking without bus arbitration, as documented in Section 5 and Figure 1 of SLASE75D.
TMDS181IRGZR 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
TMDS181IRGZR FAQ
1.How can I place an order for TMDS181IRGZR through Aetrix?
Please submit a Request for Quotation (RFQ) for TMDS181IRGZR 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 TMDS181IRGZR reliable?
The price and inventory of TMDS181IRGZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMDS181IRGZR is usually 5 days.
3.What payment methods are accepted for TMDS181IRGZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMDS181IRGZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMDS181IRGZR?
TMDS181IRGZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMDS181IRGZR 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 TMDS181IRGZR?
For technical support, including TMDS181IRGZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMDS181IRGZR requirements.
6.How does Aetrix verify that TMDS181IRGZR is sourced from the original manufacturer or authorized distributors?
All TMDS181IRGZR 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 TMDS181IRGZR meets industry standards.
7.What is the process for return or replacement of TMDS181IRGZR?
All TMDS181IRGZR units undergo pre-shipment inspection (PSI). If there is an issue with TMDS181IRGZR, 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 TMDS181IRGZR part is unused and in its original packaging.
Return procedure for TMDS181IRGZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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