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Texas Instruments TMDS141RHARG4
- Part No.:
- TMDS141RHARG4
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
TMDS141RHARG4.pdf
- Description:
- IC INTERFACE SPECIALIZED 40VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,035
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Product details
Overview
TMDS141RHARG4 from Texas Instruments is a HDMI 1.3a-compliant TMDS repeater IC designed for signal integrity restoration in digital video interconnects. It integrates four differential TMDS receivers with 8-dB equalization (compensating ≥5-m HDMI cable loss), four compliant drivers with selectable 3.5-dB de-emphasis, and an isolated I²C repeater - enabling reliable 1080p/12-bit color transmission over internal flat cables in digital TVs and AV receivers.
For engineers reviewing the TMDS141RHARG4 datasheet, TMDS141RHARG4 pinout, TMDS141RHARG4 application, or TMDS141RHARG4 equivalent, key selection criteria include its 2.25 Gbps signaling rate support, integrated 50-Ω input termination, VSADJ-controlled 400–600 mV single-ended output swing, OVS-adjustable I²C output voltage, and high-impedance TMDS outputs under OE control.
Technical Context
The TMDS141RHARG4 implements a full-channel TMDS signal regeneration architecture: each of its four TMDS channels includes a differential receiver with on-die 50-Ω termination and frequency-response equalization, followed by a current-mode driver with external VSADJ-set voltage compliance and PRE-selectable de-emphasis. Its I²C repeater features bidirectional isolation, 5-V tolerance, and OVS-configurable VOL (0.47–0.95 V) to match sink-side noise margins.
Functionally, it operates as a passive bridge between HDMI source connectors and internal receivers - accepting AC-coupled DisplayPort dual-mode signals, translating them to HDMI 1.3a TMDS levels, and forwarding EDID/HDCP handshakes via isolated DDC buses. All TMDS outputs enter high-impedance state when OE = high, and I²CEN enables/disables repeater functionality independently.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signaling Rate | Up to 2.25 Gbps - supports 1080p60 with 36-bit color depth (12 bits per channel) |
| Input Equalization | 8 dB at 825 MHz - compensates ISI losses from ≥5-m HDMI cables or FR4 traces |
| Output De-emphasis | Selectable 0 dB or 3.5 dB - offsets high-frequency loss on long PCB traces or cables |
| TMDS Output Swing | 400–600 mV single-ended (800–1200 mV differential) - set via 4.64-kΩ resistor from VSADJ to GND |
| I²C Output Voltage Select | OVS pin selects TSCL/TSDA VOL: 0.47 V (NC), 0.65 V (GND), or 0.8 V (VCC) - optimizes noise margin vs. sink receiver VIL |
| ESD Protection | ±6 kV HBM on TMDS inputs - exceeds HDMI system-level robustness requirements without external protection |
| Operating Temperature | 0°C to +70°C - qualified for consumer electronics environments including digital TV and projector chassis |
Pinout & Package
TMDS141RHARG4 is housed in a 40-pin QFN package (RHA) with exposed thermal pad, RoHS-compliant and rated for 260°C reflow. Pin functions are validated per TI SLLS737D datasheet Rev. September 2011.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RX0–RXC (pins 1,2,32,33,35,36,38,39) | TMDS differential input pairs | Accept AC-coupled HDMI/DP dual-mode signals; integrated 50-Ω termination eliminates external resistors |
| TX0–TXC (pins 9,10,12,13,15,16,18,19) | TMDS differential output pairs | Drive HDMI-compliant signals; output impedance and swing controlled by VSADJ and PRE |
| RSCL/RSDA (pins 28,29) | I²C bus interface to source side | Connect to HDMI source DDC lines; 5-V tolerant, high-Z when VCC < 1.5 V or I2CEN = low |
| TSCL/TSDA (pins 22,23) | I²C bus interface to sink side | Connect to internal HDMI receiver DDC; VOL level set by OVS pin for optimal noise margin |
| OE (pin 6) | TMDS output enable | Low = active drive; High = high-impedance outputs - enables hot-plug or power-gating scenarios |
| I2CEN (pin 5) | I²C repeater enable | High = active isolation; Low = high-Z I²C pins - prevents bus contention during power sequencing |
| PRE (pin 7) | De-emphasis control | High = 3.5 dB boost; Low = 0 dB - configures output pre-compensation for trace/cable loss |
| VSADJ (pin 30) | Output voltage swing adjust | 4.64-kΩ to GND sets 400–600 mV single-ended swing - ensures TMDS compliance across process/voltage/temp |
| OVS (pin 25) | I²C output voltage select | NC/GND/VCC configures TSCL/TSDA VOL to 0.47/0.65/0.8 V - matches varying sink receiver VIL thresholds |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 50-Ω TMDS input termination | Eliminates need for 8 external 50-Ω resistors and associated layout area - reduces BOM count and signal path discontinuities |
| 8-dB programmable equalization | Restores signal integrity from ≥5-m HDMI cables - enables use of cost-effective cabling without sacrificing 1080p60 timing margin |
| Selectably de-emphasized TMDS outputs | 3.5-dB high-frequency gain compensates FR4 trace loss - extends usable PCB trace length beyond 8 inches at 2.25 Gbps |
| Isolated, voltage-level-translating I²C repeater | Supports mixed 3.3-V/5-V DDC buses without level shifters - preserves EDID read and HDCP handshake reliability across voltage domains |
| OVS-configurable I²C output voltage | Three VOL options (0.47/0.65/0.8 V) adapt to diverse sink receiver input thresholds - prevents false ACK/NACK due to marginal noise margins |
Applications
| Digital Television | DVD/Blu-ray Player |
|---|---|
Use Scenario: Internal HDMI signal routing from rear-panel connector to SoC-based HDMI receiver over 150-mm flat flexible cable. IC Role / Device Role / Timing Role: TMDS signal repeater and equalizer restoring eye opening degraded by cable capacitance and skin effect. Use Value: Enables 1080p60 transmission with <30 ps residual jitter after 5-m equivalent loss - meets HDMI 1.3a eye diagram mask at receiver input. | Use Scenario: HDMI interface bridging between optical drive controller and display processor in compact disc player chassis. IC Role / Device Role / Timing Role: Signal conditioner and DDC isolator ensuring robust EDID exchange and HDCP authentication across noisy board regions. Use Value: Integrated I²C repeater with OVS-selectable VOL prevents bus lockup when interfacing to legacy 5-V HDMI receivers - eliminates external level-shifter ICs. |
| Set-Top Box | Audio/Video Receiver |
Use Scenario: HDMI passthrough path in multi-source STB with internal switching matrix and audio extraction circuitry. IC Role / Device Role / Timing Role: TMDS buffer with high-impedance disable (OE) enabling clean hot-plug detection and source arbitration. Use Value: OE-controlled tri-state outputs prevent signal contention during source switching - maintains HDMI link training stability across multiple inputs. | Use Scenario: HDMI distribution hub connecting satellite tuner, game console, and streaming stick to main display output. IC Role / Device Role / Timing Role: Signal regenerator with PRE-enabled de-emphasis driving long internal traces to multiple HDMI outputs. Use Value: 3.5-dB de-emphasis extends maximum trace length to 18 inches at 2.25 Gbps - supports dense multi-output PCB layouts without signal degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar HDMI TMDS repeater applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TMDS181RHAR | Supports up to 3.4 Gbps (HDMI 1.4); adds automatic cable detection and adaptive equalization | Required for 4K@30Hz or deep color beyond 12-bit; higher power (180 mA vs. 130 mA) | Choose TMDS181RHAR when future-proofing for HDMI 1.4 bandwidth or dynamic cable compensation is needed |
| Maxim MAX9217GTJ+ | LVDS-based serializer with embedded clock; not HDMI-compliant - requires protocol translation | Used in custom high-reliability avionics displays; no native DDC/I²C repeater function | Choose MAX9217GTJ+ only for non-HDMI LVDS interconnects where protocol conversion is acceptable |
Compared with TMDS141RHARG4, TMDS181RHAR delivers higher bandwidth and adaptive equalization but increases BOM cost and power; MAX9217GTJ+ offers rugged LVDS operation but lacks HDMI-native DDC handling and requires external protocol logic - making TMDS141RHARG4 the optimal choice for cost-sensitive, standards-compliant HDMI 1.3a repeater applications.
Availability
TMDS141RHARG4 is available at Aetrix Electronics and suitable for digital television, set-top box, and audio/video receiver designs requiring stable component supply, HDMI 1.3a compliance, and production-ready signal integrity assurance.
Supply support for TMDS141RHARG4 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 solutions for industrial, automotive, and consumer markets.
The TMDS141RHARG4 belongs to TI's HDMI interface product line, engineered specifically to solve signal degradation challenges in consumer AV equipment - delivering plug-and-play TMDS regeneration without firmware or configuration overhead.
FAQ
What is the maximum supported data rate for TMDS141RHARG4?
The TMDS141RHARG4 supports a maximum signaling rate of 2.25 Gbps, enabling full 1080p resolution with 12-bit color depth (36 bits per pixel) per the HDMI 1.3a specification. This rate is validated across temperature (0°C to 70°C) and supply (3.0 V to 3.6 V), with residual peak-to-peak jitter maintained below 88 ps for all TMDS data lanes under worst-case 5-m input cable conditions.
Does TMDS141RHARG4 require external termination resistors on TMDS inputs?
No, TMDS141RHARG4 does not require external termination resistors on TMDS inputs. It integrates precise 50-Ω differential termination at each RX pin pair (RX0–RXC), compliant with HDMI 1.3a electrical specifications. External terminations would cause double-termination and signal reflection - the device's internal termination is the sole required termination for proper operation of TMDS141RHARG4.
How is the TMDS output voltage swing configured on TMDS141RHARG4?
The TMDS output voltage swing of TMDS141RHARG4 is configured using a precision 4.64-kΩ resistor connected from the VSADJ pin to ground. This sets the single-ended output swing to 400–600 mV (800–1200 mV differential), meeting HDMI TMDS compliance across voltage, temperature, and process variation. Deviating from this value risks non-compliance - the exact resistor value is specified in the TMDS141RHARG4 datasheet Section 6.5.
Can TMDS141RHARG4 be used with DisplayPort sources?
Yes, TMDS141RHARG4 explicitly supports AC-coupled DisplayPort dual-mode sources. Its TMDS receivers accept DP-compatible differential signals and translate them into HDMI 1.3a-compliant TMDS levels, enabling interoperability between DP-enabled laptops or graphics cards and HDMI displays. This capability is documented in the TMDS141RHARG4 datasheet Feature List and Application Information sections.
What is the purpose of the OVS pin on TMDS141RHARG4?
The OVS (Output Voltage Select) pin on TMDS141RHARG4 configures the low-level output voltage (VOL) of the TSCL and TSDA I²C repeater outputs to match the input threshold (VIL) of downstream HDMI receivers. Setting OVS to NC, GND, or VCC selects VOL values of 0.47 V, 0.65 V, or 0.8 V respectively - preventing false ACK/NACK and bus lockup when interfacing with receivers having varying VIL specifications. This ensures robust EDID reads and HDCP handshakes for TMDS141RHARG4.
TMDS141RHARG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Applications:
- DisplayPort to TMDS Translator
- Interface:
- HDMI
- Voltage - Supply:
- 3V ~ 3.6V
- Supplier Device Package:
- 40-VQFN (6x6)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
TMDS141RHARG4 FAQ
1.How can I place an order for TMDS141RHARG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMDS141RHARG4 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 TMDS141RHARG4 reliable?
The price and inventory of TMDS141RHARG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMDS141RHARG4 is usually 5 days.
3.What payment methods are accepted for TMDS141RHARG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMDS141RHARG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMDS141RHARG4?
TMDS141RHARG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMDS141RHARG4 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 TMDS141RHARG4?
For technical support, including TMDS141RHARG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMDS141RHARG4 requirements.
6.How does Aetrix verify that TMDS141RHARG4 is sourced from the original manufacturer or authorized distributors?
All TMDS141RHARG4 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 TMDS141RHARG4 meets industry standards.
7.What is the process for return or replacement of TMDS141RHARG4?
All TMDS141RHARG4 units undergo pre-shipment inspection (PSI). If there is an issue with TMDS141RHARG4, 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 TMDS141RHARG4 part is unused and in its original packaging.
Return procedure for TMDS141RHARG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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