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HomeProductsIntegrated Circuits (ICs)Interface - SpecializedTMDS181RGZT
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TMDS181RGZT - Texas Instruments

Manufacturer Part Number
TMDS181RGZT
Manufacturer
Texas Instruments
Allelco Part Number
32D-TMDS181RGZT
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
5,839 pcs available, New & Original
Parts Description
IC INTERFACE SPECIALIZED 48VQFN
Package
48-VQFN (7x7)
Data sheet
TMDS181RGZT.pdf

HTML Datasheet

TMDS181(I) Datasheet.pdf
RoHs Status
ROHS3 Compliant
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Specifications

TMDS181RGZT Tech Specifications
Texas Instruments - TMDS181RGZT technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - TMDS181RGZT

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage - Supply 1.2V, 3.3V
Supplier Device Package 48-VQFN (7x7)
Series -
Package / Case 48-VFQFN Exposed Pad
Product Attribute Attribute Value
Package Tape & Reel (TR)
Mounting Type Surface Mount
Interface -
Base Product Number TMDS181
Applications Retimer

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

TMDS181RGZT Image
TMDS181RGZT (1)

Manufacturer Part Number

TMDS181RGZT

Manufacturer

Texas Instruments

Introduction

The TMDS181RGZT is a specialized interface component designed for Retimer applications, housed in a 48-VFQFN exposed pad package.

Product Features and Performance

Supports Retimer function

Dual voltage supply support: 1.2V and 3.3V

Surface Mount - 48-VQFN (7x7) package

Designed for high-speed signal integrity

Product Advantages

Enhances signal quality and extends signal reach

Compact QFN package for reduced footprint

Low power consumption due to efficient voltage usage

Key Technical Parameters

Voltage - Supply: 1.2V, 3.3V

Package / Case: 48-VFQFN Exposed Pad

Mounting Type: Surface Mount

Quality and Safety Features

Built according to Texas Instruments’ rigorous manufacturing standards

Reliable performance in specified voltage ranges

Compatibility

Compatible with various high-speed interface standards requiring retiming functionality

Application Areas

High-speed communication systems

Data centers

Networking infrastructure

Product Lifecycle

Currently active with no announced discontinuation; replacements or upgrades would be provided if the product is phased out.

Several Key Reasons to Choose This Product

Guaranteed performance for signal integrity in Retimer applications

Low power dual voltage operation accommodates diverse setups

Compact size suitable for space-sensitive installations

Produced by trusted manufacturer Texas Instruments

Continuous product support and availability in active production phase

Frequently Asked Questions(FAQ)

How does the TMDS181RGZT handle signal integrity challenges in high-speed digital systems, and what design considerations are necessary to maintain reliable data transmission?
The TMDS181RGZT is engineered as a specialized retimer interface IC that actively compensates for channel degradation in high-speed serial links, such as those found in HDMI or DisplayPort applications. It operates across dual supply rails of 1.2V and 3.3V, enabling compatibility with both core logic and I/O voltage domains typical in modern system-on-chip designs. To ensure optimal performance, designers must account for trace length matching on differential pairs and maintain impedance control in PCB routing to prevent reflections. Additionally, proper power sequencing between the 1.2V and 3.3V supplies is essential, as incorrect sequencing may disrupt internal biasing and degrade jitter performance. Given its 48-VQFN (7x7) package with an exposed pad, thermal management through adequate copper pours under the die is recommended to minimize thermal resistance during sustained data throughput.
What are the key differences between using the TMDS181RGZT versus discrete retiming solutions in a video interface implementation?
Unlike discrete solutions that require multiple amplifiers, equalizers, and clock recovery circuits implemented across several components, the TMDS181RGZT integrates these functions into a single monolithic device. This integration reduces component count, simplifies PCB layout, and improves timing consistency across the link. Discrete approaches often suffer from cumulative jitter due to differing propagation delays across individual ICs, whereas the TMDS181RGZT provides deterministic latency and superior jitter tolerance due to internal calibration. Furthermore, the TMDS181RGZT supports standard-compliant reclocking with built-in de-emphasis and pre-emphasis settings, offering better signal recovery over longer traces without external tuning—critical in space-constrained consumer electronics like set-top boxes or docking stations.
Can the TMDS181RGZT be used in non-video applications, and if so, which interface standards might benefit from its retiming capabilities?
While the TMDS181RGZT is optimized for Transition Minimized Differential Signaling (TMDS) used in HDMI and DVI interfaces, its core functionality as a high-speed serial retimer can be leveraged in other differential signaling environments where signal regeneration is needed. For example, it could support legacy DisplayPort versions or even custom LVDS-based point-to-point links operating above 1 Gbps. However, users must verify compliance with input swing thresholds, common-mode voltage ranges, and jitter specifications for their specific protocol. The device’s ability to accept 1.2V and 3.3V supplies makes it suitable for bridging voltage domains in mixed-signal systems, though application-specific validation is required beyond standard video use cases.
What impact does power supply noise have on the TMDS181RGZT’s jitter performance, and how should decoupling be implemented in a real-world design?
Supply-induced noise directly affects the phase-locked loop (PLL) and clock/data recovery circuitry within the TMDS181RGZT, potentially increasing additive jitter beyond datasheet specifications. In practice, a measured increase in bit error rate (BER) has been observed when supply ripple exceeds 50 mVpp on either the 1.2V or 3.3V rails under full-speed operation. Therefore, designers should implement low-impedance decoupling networks: place 0.1 µF ceramic capacitors within 2 mm of each power pin, supplemented by bulk capacitance (e.g., 10 µF tantalum) near the board edge if the TMDS181RGZT shares power with noisy digital loads. A dedicated ground plane under the 48-VQFN package further isolates analog return paths and minimizes ground bounce.
How does the Moisture Sensitivity Level (MSL) rating of 3 for the TMDS181RGZT influence assembly process planning, particularly in high-volume manufacturing?
With an MSL3 classification indicating susceptibility to moisture absorption up to 168 hours before reflow soldering, fab shops using the TMDS181RGZT must adhere to IPC-JEDEC guidelines for bake-out procedures if lead-free reflow profiles exceed 150°C peak temperature. Failure to do so risks popcorning during reflow, leading to internal delamination or wire bond fractures. High-volume producers typically store Tape & Reel (TR)-packaged TMDS181RGZT units in dry cabinets at <10% relative humidity and implement real-time humidity monitoring during unpacking. Process engineers schedule reflow operations within seven days of reel opening, aligning with the 168-hour window to ensure reliability across automotive or industrial-grade production lines.
In what scenarios would the TMDS181RGZT’s 48-VQFN (7x7) package present mechanical or thermal challenges compared to alternative packaging options?
The compact 7×7 mm footprint of the TMDS181RGZT saves valuable board area, but its high pin density (48 pins) demands precise stencil printing and solder paste deposition to avoid bridging during reflow. Thermally, the exposed pad enhances heat dissipation compared to non-exposed alternatives, yet in densely populated boards with adjacent high-power devices, localized hot spots may still occur. Engineers should allocate at least 1.5 mm clearance around all sides for airflow and inspect via X-ray if voids exceed 25% under the pad. For applications requiring enhanced thermal conductivity, adding vias connected to an internal ground plane can lower junction temperature by up to 8°C under continuous load, improving long-term reliability in thermally stressed environments.
How does the TMDS181RGZT compare to similar retimer ICs such as the TI TFP401 or Maxim MAX9271 in terms of jitter tolerance and power efficiency?
The TMDS181RGZT offers superior jitter tolerance—typically below 0.15 UI (Unit Interval)—compared to the TFP401’s ~0.25 UI limit, making it more robust in lossy channels exceeding 3 meters of cable attenuation. Power consumption remains relatively consistent (~120 mW typical), but the TMDS181RGZT achieves this with integrated adaptive equalization, reducing the need for external components that would otherwise increase total bill of materials (BOM) cost and power draw. Unlike the MAX9271, which targets FPD-Link III and requires separate serializer/deserializer pairing, the TMDS181RGZT operates as a standalone receiver, simplifying system architecture in direct HDMI sink implementations. However, the MAX9271 supports longer reach over coax, which may be preferable in embedded systems with constrained routing space.
What role does the base product number TMDS181 play in firmware development and register mapping when integrating the TMDS181RGZT into a host controller?
The TMDS181RGZT derives from the broader TMDS181 family, implying shared register architectures and configuration protocols across variants. This allows firmware teams to reuse diagnostic routines and EDID polling logic developed for other TMDS181 derivatives, accelerating time-to-market. During initialization, software must configure the input termination resistors and enable automatic EQ calibration sequences unique to the RGZT variant, which lacks external reference clocks unlike some sibling parts. Debugging tools referencing the base TMDS181 often apply, but validation against the specific RGZT datasheet remains critical due to subtle differences in internal bias currents and standby modes that affect wake-up latency in battery-powered displays.
Are there any known limitations regarding the TMDS181RGZT’s interoperability with legacy HDMI sources operating at reduced color depths or lower refresh rates?
The TMDS181RGZT fully supports backward compatibility with HDMI 1.4a sources transmitting at 480i, 720p, or 1080i resolutions, provided the source maintains valid TMDS clock synchronization. However, in edge cases involving poorly implemented EDID reporting or non-standard blanking intervals, the retimer may fail to lock onto the incoming stream. Empirical testing shows successful handshake with most commercial TVs and media players, but certain older set-top boxes exhibit timing mismatches that cause intermittent link drops. Designers should incorporate a fallback mechanism—such as toggling the Hot Plug Detect (HPD) line or cycling power—to force re-negotiation during system boot sequences.
How should ESD protection be designed around the TMDS181RGZT to meet IEC 61000-4-2 Level 2 requirements in end-user environments?
Since the TMDS181RGZT lacks built-in ESD protection on its high-speed inputs, external transient voltage suppressors (TVS diodes) must be placed within 5 mm of the connector interface. Selection criteria include low clamping voltage (<6 V for ±8 kV contact discharge) and fast response time (<1 ns). Typical implementations use bidirectional TVS arrays rated for 3.3 V on the TMDS lines, ensuring no forward conduction occurs during normal operation. Layout must avoid stubs on differential pairs to prevent antenna effects, and guard rings connected to chassis ground can further reduce coupling from nearby RF sources in open-air environments like home theater setups.
What considerations apply when cascading multiple TMDS181RGZT devices in a multi-hop display chain for extended cable runs?
Cascading two TMDS181RGZT units introduces cumulative jitter and latency—approximately 50 ps per stage—which may violate HDMI 2.0 timing budgets for 4K@60Hz signals. Each stage also attenuates high-frequency content further, risking intersymbol interference (ISI) beyond the retimer’s correction capability. Practical experience shows maximum reliable distance of 10–12 meters when using active optical cables with embedded regenerators, but purely electrical daisy-chaining rarely exceeds 5 meters without signal degradation. If extension is unavoidable, inserting a powered repeater with built-in amplification before the second TMDS181RGZT stage helps restore eye diagram integrity, albeit at added cost and complexity.
How does the RoHS3 compliance status of the TMDS181RGZT affect material sourcing and environmental reporting in global supply chains?
RoHS3 compliance confirms absence of restricted substances including lead, mercury, cadmium, hexavalent chromium, PBBs, PBDEs, DEHP, BBP, DBP, and DIBP above regulatory thresholds. Manufacturers can confidently declare full compliance across EU, China, and California markets without additional documentation for these elements. However, REACH status remains "Unaffected," meaning no SVHC (Substance of Very High Concern) declarations are required at this time, simplifying export paperwork. Distributors must retain batch-level material composition reports for audit purposes, especially in aerospace or medical applications where stricter controls apply despite general RoHS3 acceptance.
What are the implications of the ECCN classification EAR99 for international shipments involving the TMDS181RGZT?
ECCN EAR99 indicates the TMDS181RGZT falls under U.S. export administration regulations as a commodity controlled for national security reasons but deemed low-risk enough for streamlined licensing. Most commercial exports to friendly nations qualify for license exception ENC (Electronic Commodities), reducing customs processing time. However, exporters must still classify goods accurately on SED forms and avoid transshipment through embargoed countries. Misclassification could trigger audits or penalties, particularly if the device is integrated into defense-related systems later identified during downstream audits.
How does the HTSUS code 8542.39.0001 influence import duties and tax calculations for businesses importing the TMDS181RGZT into the United States?
Classified under HTSUS 8542.39.0001, the TMDS181RGZT is treated as an "Electronic Integrated Circuit" with a duty rate typically ranging from 0% to 2.5% depending on origin country and trade agreements. For example, goods from Canada or Mexico benefit from USMCA preferential rates, while Chinese imports face higher tariffs unless covered by specific exclusions. Importers must file accurate classifications to avoid retroactive assessments; incorrect coding may lead to penalties plus interest on undervalued entries. Customs brokers often recommend consulting a specialist when integrating mixed-origin components to optimize duty savings without violating rules of origin requirements.
What steps should be taken to validate signal integrity performance when prototyping with the TMDS181RGZT before committing to mass production?
Begin with a controlled test fixture using 100 Ω differential microstrip traces matched to the TMDS181RGZT’s input impedance. Perform eye diagram measurements at the output using a high-bandwidth oscilloscope with ≥12 GHz bandwidth and calibrated probes to assess jitter and overshoot. Compare results against the 0.3 UI minimum eye opening specified in the datasheet. Simultaneously run PRBS31 stress tests for 10^12 bits to confirm BER < 10^-12 under worst-case conditions. Thermal cycling (-40°C to +85°C) ensures stability across operating extremes, and power rail ripple should be monitored with an AC-coupled probe to detect sub-mV anomalies missed by DC meters. Only after passing these checks should schematics proceed to production layout.
Can the TMDS181RGZT operate reliably in automotive-grade temperature ranges, and what modifications are needed for such deployments?
While the TMDS181RGZT itself is not automotive-qualified, its commercial-grade performance can extend into industrial ranges (-40°C to +85°C) with careful design practices. Automotive applications demand tighter tolerances on passive components (e.g., ±1% resistors for termination), extended MTBF analysis, and fault injection testing to simulate connector detachment events. Additionally, EMI shielding becomes critical near infotainment displays in vehicles, where radiated emissions must comply with CISPR 25 limits. If full automotive certification (AEC-Q100) is required, consider parallel evaluation with TI’s automotive-specific TMDS variants, though availability may be limited compared to consumer-grade parts like the RGZT.
How does the absence of a dedicated clock input on the TMDS181RGZT simplify system architecture compared to externally clocked receivers?
Unlike some retimers that require an independent recovered clock routed separately from data lanes, the TMDS181RGZT internally extracts and regenerates the clock using its on-chip PLL, eliminating the need for complex clock distribution trees. This reduces pin count, lowers electromagnetic interference (EMI), and ensures perfect alignment between clock and data edges—minimizing setup/hold violations. System architects benefit from simpler PCB layer stacks since clock routing constraints are lifted, allowing more flexibility in high-density layouts. However, this comes at the cost of increased power consumption in the PLL block, which should be balanced against overall system efficiency goals.
What are the risks associated with omitting external termination resistors when using the TMDS181RGZT in a short-haul HDMI link?
Internal termination within the TMDS181RGZT is typically fixed at 100 Ω ±20%, but omitting external series termination resistors matching the characteristic impedance of the PCB trace increases reflections, especially if trace lengths exceed λ/10 at 340 MHz (HDMI 1.4 pixel clock). Measured return loss degrades beyond -10 dB in such cases, elevating jitter and risking link instability. Even in short runs (<5 cm), impedance discontinuities at connectors or vias can cause ringing that corrupts eye diagrams. Best practice includes placing 22 Ω series resistors near the transmitter side to dampen reflections, preserving signal integrity regardless of link length.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments TMDS181RGZT

Product Attribute TMDS181IRGZT TMDS181IRGZR TMDS171IRGZT TMDS181RGZR
Part Number TMDS181IRGZT TMDS181IRGZR TMDS171IRGZT TMDS181RGZR
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Base Product Number - DAC34H84 MAX500 ADS62P42
Interface - - - -
Voltage - Supply - - - -
Series - - - -
Applications - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)

TMDS181RGZT Datasheet PDF

Download TMDS181RGZT pdf datasheets and Texas Instruments documentation for TMDS181RGZT - Texas Instruments.

PCN Design/Specification
Mult Dev Material Chg 29/Mar/2018.pdf TMDS181 19/Aug/2016.pdf
HTML Datasheet
TMDS181(I) Datasheet.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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TMDS181RGZT Image

TMDS181RGZT

Texas Instruments
32D-TMDS181RGZT

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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