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Texas Instruments TMDS341PFCRG4
- Part No.:
- TMDS341PFCRG4
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 80-TQFP
- Datasheet:
-
TMDS341PFCRG4.pdf
- Description:
- IC 3-TO-1 DVI/HDMI SWITCH 80TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:30,000
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Product details
Overview
TMDS341PFCRG4 from Texas Instruments is a 3-to-1 DVI/HDMI digital video switch IC designed for routing high-speed TMDS signals in consumer AV systems. It supports signaling rates up to 1.65 Gbps, operates from a 3.3-V supply, integrates 8-dB input equalization and 3-dB selectable output de-emphasis, and features isolated DDC buses per port - enabling seamless source switching in HDMI/DVI-equipped digital TVs, projectors, and AV receivers.
For engineers reviewing the TMDS341PFCRG4 datasheet, TMDS341PFCRG4 pinout, TMDS341PFCRG4 application, or TMDS341PFCRG4 equivalent, key selection criteria include inter-pair output skew (<100 ps), 5-V-tolerant DDC/HPD I/Os, integrated 50-Ω receiver termination, hot-plug detector isolation logic, and compliance with TMDS electrical specifications for UXGA display support.
Technical Context
The TMDS341PFCRG4 implements a 3-input, 1-output TMDS multiplexer with independent control of source selection (S1/S2/S3) and output enable (OE). Each of its three ports provides four differential TMDS channels (A/B pairs), one HPD signal, and a bidirectional I²C-compatible DDC bus (SCL/SDA), with internal pass-gate level shifting enabling 5-V DDC tolerance without external translators.
It incorporates fixed 8-dB receiver equalization optimized for 5-m DVI cable loss compensation, programmable 3-dB output de-emphasis via PRE pin, precision VSADJ-controlled differential output swing (400–600 mV single-ended), and high-impedance outputs when disabled - all while maintaining inter-pair skew ≤100 ps and residual peak-to-peak jitter ≤30 ps at 1.65 Gbps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signaling Rate | Up to 1.65 Gbps - supports full HD (1080p) and UXGA (1600×1200) video timing over DVI/HDMI links. |
| Supply Voltage | 3.3 V (3.0–3.6 V range) - compatible with standard low-voltage digital logic domains and reduces power dissipation vs 5-V alternatives. |
| Input Equalization | Fixed 8-dB - compensates for frequency-dependent loss in up to 5-m 28-AWG DVI/HDMI cables, preserving eye opening at receiver input. |
| Output De-emphasis | Selectable 0 dB or 3 dB via PRE pin - pre-compensates for channel loss between switch output and downstream sink. |
| Inter-pair Skew | <100 ps - ensures timing alignment across all four TMDS channels (Y1/Z1 to Y4/Z4), critical for pixel clock integrity and video stability. |
| DDC Voltage Tolerance | 5-V tolerant on SCL/SDA/HPD_SINK pins - eliminates need for external level shifters when interfacing with standard 5-V I²C buses. |
| ESD Protection | >3 kV HBM - meets industrial handling requirements without additional protection circuitry on board. |
Pinout & Package
TMDS341PFCRG4 is housed in an 80-pin TQFP (PFC) package with exposed thermal pad, RoHS-compliant and rated for 260°C reflow. Pin functions are validated per TI SLLS660B datasheet revision January 2006.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A11–A14, A21–A24, A31–A34 | TMDS positive inputs (Port 1–3) | Differential data/clock inputs per port; internally terminated to 50 Ω, require no external resistors. |
| B11–B14, B21–B24, B31–B34 | TMDS negative inputs (Port 1–3) | Complementary inputs paired with Axx pins; support AC-coupled or DC-coupled TMDS interfaces. |
| Y1–Y4, Z1–Z4 | TMDS positive/negative outputs | Single-ended swing 400–600 mV; high-impedance when OE = high; compliant with TMDS voltage swing spec. |
| S1, S2, S3 | Source select inputs | 3-bit binary code selects active input port (1–3); "LLL" disables all outputs (high-Z). |
| HPD1–HPD3, HPD_SINK | Hot-plug detect I/O | Open-drain outputs (HPD1–3) drive sink-side HPD_SINK; 5-V tolerant input enables direct HDMI connector interface. |
| SCL1–SCL3, SDA1–SDA3, SCL_SINK, SDA_SINK | DDC I²C bus lines | Bi-directional pass-gate I/Os with 5-V tolerance; isolate unused ports' DDC buses automatically. |
| VSADJ | Voltage swing adjustment | Connects to ground via 4.64-kΩ precision resistor to set TMDS output differential swing to 560–840 mVpp. |
| PRE | Output de-emphasis control | Logic-high enables 3-dB de-emphasis; improves signal integrity on longer PCB traces or cables beyond 5 m. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 50-Ω receiver termination | Eliminates need for 16 external 50-Ω resistors (4 per port), reducing BOM count and layout complexity. |
| Isolated DDC buses per port | Prevents I²C bus contention during source switching; allows independent EDID reads from each connected source device. |
| 8-dB fixed input equalization | Compensates for up to 5-m 28-AWG DVI cable loss, restoring signal integrity without requiring adaptive EQ or firmware tuning. |
| 3.3-V operation with 5-V-tolerant I/O | Enables direct connection to both 3.3-V control logic and legacy 5-V HDMI DDC/HPD infrastructure without level-shifting components. |
| Inter-pair output skew <100 ps | Guarantees tight timing alignment across all four TMDS lanes, preventing pixel misalignment or color fringing in high-resolution displays. |
Applications
| Digital Television | Digital Projector |
|---|---|
Use Scenario: Switching between HDMI-connected Blu-ray player, game console, and streaming stick into a single TV HDMI input. IC Role / Device Role / Timing Role: 3-to-1 TMDS multiplexer with automatic DDC bus isolation and HPD passthrough to maintain EDID handshake integrity per selected source. Use Value: Enables plug-and-play source switching without display retraining; preserves 1.65 Gbps bandwidth for 1080p60 and UXGA resolution. | Use Scenario: Integrating multiple HDMI sources (laptop, media server, document camera) into a conference room projector with single HDMI input. IC Role / Device Role / Timing Role: High-fidelity TMDS signal router with 8-dB input EQ to compensate for long HDMI cable runs from wall plates to projector. Use Value: Maintains clean eye diagrams after 5-m cable; eliminates need for external redrivers or repeaters in fixed-install AV systems. |
| Audio/Video Receiver | HDMI Switch Box |
Use Scenario: Internal video path management in an AV receiver supporting simultaneous HDMI inputs and output to display or recording device. IC Role / Device Role / Timing Role: Core DVI/HDMI switch with 5-V-tolerant DDC and HPD handling, enabling reliable EDID negotiation and hot-plug detection across all inputs. Use Value: Reduces system-level latency vs software-based switching; supports zero-frame-drop video handoff during source changes. | Use Scenario: Standalone 3-in-1-out HDMI switch box with front-panel button or IR remote control. IC Role / Device Role / Timing Role: Self-contained TMDS switch with integrated termination, EQ, and de-emphasis - requires only S1/S2/S3 logic control and 3.3-V supply. Use Value: Minimizes bill-of-materials and PCB area; enables compact, fanless enclosure design with full 1080p60 support. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DVI/HDMI switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TMDS341PFCR | Same die, tape-and-reel packaging (no G4 suffix); identical electrical specs and pinout. | No functional difference; intended for automated assembly vs tray-packaged PFCRG4. | Select TMDS341PFCRG4 for manual prototyping or low-volume builds where tray packaging simplifies handling. |
| ON Semiconductor NB7L14M | 2-channel LVDS/MLVDS switch; no integrated DDC/HPD, no TMDS EQ/de-emphasis, 3.3-V only, not 5-V tolerant. | Limited to point-to-point LVDS routing; unsuitable for HDMI source switching due to missing DDC isolation and HPD logic. | Use NB7L14M only for non-HDMI LVDS signal routing; TMDS341PFCRG4 remains required for full HDMI/DVI feature compatibility. |
Compared with TMDS341PFCR, the TMDS341PFCRG4 offers identical performance in tray packaging for evaluation and small-batch use; compared with NB7L14M, it delivers complete HDMI system functionality - including DDC bus management, HPD signaling, and TMDS-specific equalization - essential for consumer AV switching.
Availability
TMDS341PFCRG4 is available at Aetrix Electronics and suitable for digital television, AV receiver, and HDMI switch box designs requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for TMDS341PFCRG4 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, with decades of expertise in high-speed interface ICs for consumer and industrial markets.
The TMDS341PFCRG4 belongs to TI's high-speed interface product line, engineered specifically for HDMI/DVI signal routing in cost-sensitive, space-constrained AV equipment where integration of termination, EQ, and DDC management is critical.
FAQ
What is the maximum supported data rate for TMDS341PFCRG4?
The TMDS341PFCRG4 supports signaling rates up to 1.65 Gbps per TMDS channel, enabling full HD (1080p60) and UXGA (1600×1200@60 Hz) video resolutions. This rating is verified across temperature (0°C to 70°C) and supply (3.0–3.6 V), with typical inter-pair skew <100 ps and residual jitter ≤30 ps at this rate - ensuring robust eye opening at the sink.
Does TMDS341PFCRG4 require external termination resistors on TMDS inputs?
No, the TMDS341PFCRG4 integrates 50-Ω termination resistors at all TMDS input pins (Axx/Bxx), eliminating the need for external 50-Ω resistors. These terminations are pulled to VCC and are fully compliant with TMDS electrical specifications - confirmed in TI SLLS660B Figure 1 and Terminal Functions table.
How does the TMDS341PFCRG4 handle DDC bus isolation between unused ports?
The TMDS341PFCRG4 uses internal bi-directional pass gates to isolate the SCL/SDA lines of unselected ports, preventing I²C bus contention. Only the DDC bus of the active source (selected via S1/S2/S3) connects to SCL_SINK/SDA_SINK; unused ports present high-impedance on their DDC lines - a key feature documented in the Functional Block Diagram and Applications section.
What is the purpose of the VSADJ pin on TMDS341PFCRG4?
The VSADJ pin on TMDS341PFCRG4 sets the TMDS output differential voltage swing by connecting a precision 4.64-kΩ resistor to ground. This adjusts the output current source to deliver 560–840 mVpp differential swing - meeting TMDS specification compliance. Deviation from this value risks non-compliant signal levels and link failure.
Can TMDS341PFCRG4 be used in a 2-to-1 switch configuration?
Yes, the TMDS341PFCRG4 can be configured as a 2-to-1 switch by tying one source selector input (e.g., S3) low and leaving the corresponding TMDS inputs, HPD, SCL, and SDA pins unconnected - as specified in TI Application Information section "Configuring the TMDS341 as a 2:1 Switch". All other functionality remains identical.
TMDS341PFCRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 80-TQFP
- Packaging:
- Bulk
- Product Status:
- Active
- Applications:
- 3:1 Switchable DVI/HDMI Receiver
- Interface:
- DVI, HDMI
- Voltage - Supply:
- 3V ~ 3.6V
- Supplier Device Package:
- 80-TQFP (12x12)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
TMDS341PFCRG4 FAQ
1.How can I place an order for TMDS341PFCRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMDS341PFCRG4 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 TMDS341PFCRG4 reliable?
The price and inventory of TMDS341PFCRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMDS341PFCRG4 is usually 5 days.
3.What payment methods are accepted for TMDS341PFCRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMDS341PFCRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMDS341PFCRG4?
TMDS341PFCRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMDS341PFCRG4 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 TMDS341PFCRG4?
For technical support, including TMDS341PFCRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMDS341PFCRG4 requirements.
6.How does Aetrix verify that TMDS341PFCRG4 is sourced from the original manufacturer or authorized distributors?
All TMDS341PFCRG4 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 TMDS341PFCRG4 meets industry standards.
7.What is the process for return or replacement of TMDS341PFCRG4?
All TMDS341PFCRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TMDS341PFCRG4, 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 TMDS341PFCRG4 part is unused and in its original packaging.
Return procedure for TMDS341PFCRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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