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Texas Instruments TMDS341APFCG4
- Part No.:
- TMDS341APFCG4
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 80-TQFP
- Datasheet:
-
TMDS341APFCG4.pdf
- Description:
- IC INTERFACE SPECIALIZED 80TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,556
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Product details
Overview
TMDS341APFCG4 from Texas Instruments is a 3-to-1 DVI/HDMI switch IC for digital video routing in consumer AV systems. It supports up to 2.25 Gbps signaling rate, 80-pin TQFP package, 3.3-V supply operation, and integrated 8-dB input equalization-enabling reliable switching of three HDMI/DVI sources to a single display terminal in digital TVs and audio/video receivers.
For engineers reviewing the TMDS341APFCG4 datasheet, TMDS341APFCG4 pinout, TMDS341APFCG4 application, or TMDS341APFCG4 equivalent, key selection criteria include TMDS channel count (4), hot-plug detector isolation per port, I²C DDC bus pass-through capability, differential output skew (<100 ps), and 5-V tolerance on HPD_SINK and DDC pins.
Technical Context
The TMDS341APFCG4 implements a 3-input, 1-output multiplexer architecture with independent TMDS receiver stages per port-each featuring fixed 8-dB equalization and 50-Ω integrated termination. Source selection is controlled via three LVTTL logic inputs (S1–S3), with automatic DDC bus routing and HPD signal forwarding only for the active port.
It integrates isolated DDC pass gates with 5-V tolerance, supports HDMI 1.3a compliance, and provides selectable 3-dB output de-emphasis (via PRE pin) and high-impedance outputs when disabled (OE pin). The device operates from 0°C to 70°C with 3.3-V VCC and AVCC supplies, and requires an external 4.64-kΩ resistor on VSADJ for TMDS-compliant voltage swing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signaling Rate | Up to 2.25 Gbps - supports 1080p/12-bit color at 1485 Mbps and 1080i/p at full HDMI 1.3a bandwidth |
| Supply Voltage | 3.3 V (3.0–3.6 V range) - single-rail operation compatible with standard digital AV system power domains |
| Input Equalization | Fixed 8-dB - compensates up to 5-m 28-AWG DVI/HDMI cable loss without external components |
| Output Skew | Intra-pair <50 ps, inter-pair <100 ps - ensures pixel-level timing alignment across all four TMDS channels |
| DDC Interface | I²C pass-through with 5-V tolerance - eliminates level-shifter requirement between 3.3-V IC and 5-V source/sink DDC buses |
| ESD Protection | HBM ≥5 kV on TMDS inputs - meets robustness requirements for consumer electronics board-level handling |
| Operating Temp | 0°C to 70°C - validated for commercial-grade digital TV, projector, and A/V receiver environments |
Pinout & Package
Package: 80-pin TQFP (PFC), 12 mm × 12 mm, 0.5-mm pitch, RoHS-compliant and 260°C reflow rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A11–A14, A21–A24, A31–A34 | TMDS positive inputs (Port 1–3) | Differential data/clock inputs per port; each pair accepts AC- or DC-coupled HDMI/DVI signals |
| B11–B14, B21–B24, B31–B34 | TMDS negative inputs (Port 1–3) | Complements A-pins; internal 50-Ω termination to VCC reduces need for external resistors |
| Y1–Y4, Z1–Z4 | TMDS positive/negative outputs | Single-ended swing 400–600 mV into 50-Ω load; OE pin controls high-Z state |
| S1, S2, S3 | Source select inputs | LVTTL logic selects active port (S1=S2=S3=H → Port 1; LHL → Port 3); unused ports fully isolated |
| HPD1–HPD3, HPD_SINK | Hot-plug detect I/O | Open-drain outputs (35-Ω typical) for source-side HPD; 5-V tolerant input for sink-side HPD assertion |
| SCL1–SCL3, SDA1–SDA3, SCL_SINK, SDA_SINK | DDC I²C bidirectional lines | Pass-gate implementation enables direct 3.3-V ↔ 5-V DDC communication without external level shifters |
| VSADJ | Voltage swing adjustment | Connects to ground via 4.64-kΩ precision resistor to set compliant TMDS differential output (560–840 mVpp) |
| PRE | Output de-emphasis control | Logic-high enables 3-dB pre-emphasis to counteract interconnect losses beyond 5 m |
Key Features
| Feature | Design Value |
|---|---|
| 3-to-1 TMDS switching | Enables cost-effective multi-source routing in AV receivers and smart displays without FPGA or MCU intervention |
| Integrated 50-Ω receiver termination | Eliminates 12 external 50-Ω resistors per port, reducing BOM count and PCB area in compact HDMI switch designs |
| Isolated DDC bus per unused port | Prevents I²C bus contention and EDID corruption when multiple sources share one sink interface |
| 5-V tolerant HPD_SINK and DDC pins | Allows direct connection to standard HDMI connectors without level-shifting circuitry or voltage dividers |
| High-impedance outputs when disabled | Permits safe insertion/removal of cables during system operation without signal injection or bus loading |
| 80-pin TQFP with thermal pad | Supports efficient heat dissipation at 230 mA typical ICC and 657 mW max power dissipation under full load |
Applications
| Home Theater AV Receiver | Digital Television |
|---|---|
Use Scenario: Switching between Blu-ray player, game console, and streaming box to a single HDMI output driving a projector. IC Role / Device Role / Timing Role: Central TMDS multiplexer managing four differential data channels and DDC handshaking across three independent HDMI sources. Use Value: Maintains 2.25 Gbps link integrity with <100 ps inter-pair skew and built-in equalization-preserving 1080p/12-bit color fidelity without external signal conditioning. | Use Scenario: Integrating multiple HDMI inputs (cable box, USB media, built-in tuner) into a single-panel display controller. IC Role / Device Role / Timing Role: Input selector providing hot-plug detection forwarding and EDID passthrough to ensure plug-and-play source recognition. Use Value: 5-V tolerant DDC and HPD interfaces eliminate level-shifters; isolated unused ports prevent EDID conflicts during dynamic source changes. |
| Digital Projector | Professional Audio/Video Switcher |
Use Scenario: Routing HDMI signals from laptop, document camera, and media server to a high-resolution projector in conference rooms. IC Role / Device Role / Timing Role: Signal conditioner and selector delivering low-jitter TMDS outputs (<30 ps residual jitter at 2.25 Gbps) and stable DDC communication. Use Value: Fixed 8-dB equalization restores signal integrity over 5-m cables; PRE-controlled de-emphasis extends reach to 10-m deployments. | Use Scenario: Rack-mounted HDMI distribution unit supporting simultaneous monitoring and recording from three live sources. IC Role / Device Role / Timing Role: Core switching element enabling independent control of TMDS path, DDC arbitration, and HPD status reporting per port. Use Value: High-impedance output mode (OE) allows safe hot-swap of downstream monitors; LVTTL-select logic simplifies microcontroller interface. |
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 TMDS341APFCR | Same die and pinout; tape-and-reel packaging only-no electrical or functional difference from TMDS341APFCG4 | Identical use cases; selected for automated SMT assembly instead of tube packaging | Choose TMDS341APFCR for high-volume production requiring reel-fed placement |
| ON Semiconductor NB7L572M | 2:1 LVDS/PECL switch; no integrated DDC, HPD, or TMDS equalization-requires external level translation and termination | Targeted at non-HDMI serial links (e.g., DisplayPort auxiliary, custom video backplanes), not HDMI/DVI consumer routing | Select NB7L572M only for non-standard differential interfaces where DDC/HPD are handled externally |
Compared with TMDS341APFCG4, TMDS341APFCR offers identical functionality in tape-and-reel form for volume manufacturing, while NB7L572M serves fundamentally different signal types and lacks HDMI-specific features-making TMDS341APFCG4 the sole drop-in solution for standards-compliant 3-to-1 HDMI switching.
Availability
TMDS341APFCG4 is available at Aetrix Electronics and suitable for digital TV, audio/video receiver, and professional projector applications requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for TMDS341APFCG4 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 TMDS341A product line delivers HDMI/DVI signal routing ICs optimized for multi-source AV equipment-designed to simplify compliance with HDMI 1.3a physical layer requirements while minimizing external component count.
FAQ
What is the maximum supported data rate for TMDS341APFCG4?
The TMDS341APFCG4 supports a maximum signaling rate of 2.25 Gbps, verified per HDMI 1.3a specification. This enables full support for 1080p resolution at 12-bit color depth (1485 Mbps) and 1080i/p formats up to 225 MHz pixel clock. Performance is characterized across temperature (0°C to 70°C) and supply (3.0–3.6 V).
Does TMDS341APFCG4 require external termination resistors on TMDS inputs?
No, TMDS341APFCG4 integrates 50-Ω termination resistors on all TMDS input pins (A/B pairs), pulled to VCC. External terminations are unnecessary. Each input also includes fixed 8-dB equalization to compensate for up to 5-m cable loss-reducing design complexity and PCB footprint versus discrete termination solutions.
How does TMDS341APFCG4 handle DDC (I²C) communication between sources and sink?
TMDS341APFCG4 uses bi-directional pass-gate DDC interfaces with 5-V tolerance on all SCL/SDA pins. When a port is selected, its SCLn/SDAn lines connect directly to SCL_SINK/SDA_SINK; unused ports are electrically isolated. This preserves EDID read/write integrity and eliminates need for external I²C level shifters in mixed-voltage HDMI systems.
What is the function of the PRE pin on TMDS341APFCG4?
The PRE pin on TMDS341APFCG4 controls 3-dB output de-emphasis: logic-high enables pre-emphasis to offset high-frequency loss in longer interconnects (>5 m), while logic-low disables it for standard-length cables. This feature optimizes eye diagram opening at the receiver without requiring external equalization circuitry.
Can TMDS341APFCG4 be used in a 2-to-1 configuration?
Yes, TMDS341APFCG4 can be configured as a 2-to-1 switch by grounding one source select input (e.g., S3 = L) and leaving the corresponding TMDS inputs, DDC lines, and HPD pin unconnected. The remaining two ports operate identically to full 3-to-1 mode, retaining all features including DDC isolation and HPD forwarding for active sources.
TMDS341APFCG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 80-TQFP
- Packaging:
- Tray
- Product Status:
- Discontinued at Digi-Key
- 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
TMDS341APFCG4 FAQ
1.How can I place an order for TMDS341APFCG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMDS341APFCG4 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 TMDS341APFCG4 reliable?
The price and inventory of TMDS341APFCG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMDS341APFCG4 is usually 5 days.
3.What payment methods are accepted for TMDS341APFCG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMDS341APFCG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMDS341APFCG4?
TMDS341APFCG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMDS341APFCG4 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 TMDS341APFCG4?
For technical support, including TMDS341APFCG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMDS341APFCG4 requirements.
6.How does Aetrix verify that TMDS341APFCG4 is sourced from the original manufacturer or authorized distributors?
All TMDS341APFCG4 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 TMDS341APFCG4 meets industry standards.
7.What is the process for return or replacement of TMDS341APFCG4?
All TMDS341APFCG4 units undergo pre-shipment inspection (PSI). If there is an issue with TMDS341APFCG4, 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 TMDS341APFCG4 part is unused and in its original packaging.
Return procedure for TMDS341APFCG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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