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Texas Instruments TMDS341APFCR
- Part No.:
- TMDS341APFCR
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 80-TQFP
- Datasheet:
-
TMDS341APFCR.pdf
- Description:
- IC INTERFACE SPECIALIZED 80TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,870
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Product details
Overview
TMDS341APFCR 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 TMDS341APFCR datasheet, TMDS341APFCR pinout, TMDS341APFCR application, or TMDS341APFCR equivalent, key selection criteria include TMDS channel skew (<100 ps inter-pair), 5-V-tolerant DDC/HPD interfaces, HDMI 1.3a compliance, integrated 50-Ω receiver termination, and OE-controlled high-impedance outputs during disable.
Technical Context
The TMDS341APFCR implements a 3-input × 4-channel TMDS multiplexer with independent hot-plug detection (HPD) and isolated I²C (DDC) pass-gates per port. Each input includes fixed 8-dB equalization and 50-Ω integrated termination; outputs support selectable 3-dB de-emphasis via PRE pin and comply with TMDS differential voltage swing (560–840 mVpp) when VSADJ is biased with 4.64-kΩ resistor.
Source selection is controlled by three LVTTL logic inputs (S1/S2/S3), routing one active port's TMDS, DDC, and HPD signals to shared output pins (Y1–Y4/Z1–Z4, SDA_SINK/SCL_SINK, HPD_SINK). Unused ports are electrically isolated: DDC buses float, HPD outputs drive low, and TMDS receivers remain active but do not propagate to outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signaling Rate | Up to 2.25 Gbps - supports 1080p@60Hz 12-bit color depth without data loss |
| Supply Voltage | 3.3 V (3.0–3.6 V range) - compatible with standard digital AV system power rails |
| Input Equalization | Fixed 8-dB - compensates up to 5-m 28-AWG DVI/HDMI cable loss, reducing residual jitter by ~60 ps |
| Output Skew | Intra-pair <50 ps, inter-pair <100 ps - maintains TMDS eye integrity across all four channels |
| DDC Interface | 5-V tolerant I²C pass-gate - eliminates level-shifter requirement between 3.3-V IC and 5-V HDMI source/sink |
| ESD Protection | HBM ≥5 kV on TMDS inputs - exceeds IEC 61000-4-2 Level 4 for robust board-level handling |
| Operating Temp | 0°C to +70°C - qualified for commercial digital TV, projector, and STB 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, B11–B14 | Port 1 TMDS+ / TMDS− inputs | Differential video/audio data inputs from source 1; internally terminated with 50 Ω |
| Y1–Y4, Z1–Z4 | TMDS+ / TMDS− outputs | Switched differential outputs to sink; high-impedance when OE = high |
| S1, S2, S3 | Source select control inputs | LVTTL logic selects active input port (001=Port1, 010=Port2, 100=Port3) |
| HPD1–HPD3, HPD_SINK | Hot-plug detect I/O | Open-drain outputs (Ports 1–3); 5-V-tolerant input (HPD_SINK) for EDID handshake |
| SDA1–SDA3, SCL1–SCL3, SDA_SINK, SCL_SINK | DDC I²C bidirectional pass-gates | Isolated I²C paths per port; 5-V tolerant, no external level shifter needed |
| OE | Output enable (active low) | Drives TMDS outputs to high-Z state - essential for seamless source switching |
| VSADJ | TMDS output swing control | Connects to ground via 4.64-kΩ precision resistor to set compliant 560–840 mVpp differential swing |
Key Features
| Feature | Design Value |
|---|---|
| 3-to-1 TMDS switching | Enables single-display aggregation of three HDMI/DVI sources without external mux logic or FPGA intervention |
| Integrated 50-Ω receiver termination | Eliminates need for 16 external 50-Ω resistors - reduces BOM count and PCB area in compact AV designs |
| Isolated DDC bus per port | Prevents I²C bus contention during source switching - ensures reliable EDID reads and HDCP handshakes |
| 8-dB fixed input equalization | Restores signal integrity after 5-m cable run - enables use of cost-effective 28-AWG HDMI cables without repeaters |
| 5-V-tolerant HPD and DDC pins | Direct interface to standard HDMI connectors - removes level-shifting components and simplifies layout |
Applications
| Digital Television | Digital Projector |
|---|---|
Use Scenario: Switching between HDMI-connected Blu-ray player, game console, and streaming stick into a single TV input. IC Role / Device Role / Timing Role: Central TMDS multiplexer managing hot-plug detection, DDC arbitration, and signal equalization across three concurrent sources. Use Value: Enables plug-and-play source selection without manual EDID re-reads or display retraining - critical for consumer UX. | Use Scenario: Routing HDMI video from laptop, media server, and document camera to a conference room projector. IC Role / Device Role / Timing Role: High-fidelity TMDS signal router preserving 1080p/60Hz timing integrity and minimizing inter-pair skew for stable image rendering. Use Value: Maintains pixel-perfect synchronization and eliminates visible tearing or blanking during source transitions. |
| Audio/Video Receiver | DVD/Blu-ray Player |
Use Scenario: Integrating multiple HDMI inputs into an AV receiver's internal video path before output to display. IC Role / Device Role / Timing Role: Front-end video switch supporting HDCP passthrough and dynamic HPD management for multi-source playback. Use Value: Allows simultaneous connection of up to three premium sources while maintaining HDCP 1.4 compliance and zero-latency switching. | Use Scenario: Internal HDMI output switching between main video processor and secondary scaler or subtitle engine. IC Role / Device Role / Timing Role: Embedded TMDS selector enabling dual-path video processing without external connectors or cables. Use Value: Reduces internal signal degradation by eliminating long PCB traces - improves eye diagram margin at 1.65 Gbps. |
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 TMDS341BPFCR | Same pinout and function; supports extended temperature range (–40°C to +85°C) and higher ESD rating (8 kV HBM) | Required for industrial or automotive infotainment displays operating beyond 0°C–70°C | Select TMDS341BPFCR when ambient temperature or reliability requirements exceed commercial grade. |
| ON Semiconductor NB7L14MNR2G | 4-channel 3:1 LVDS/PECL mux; no integrated DDC/HPD, no equalization, requires external termination | Used in non-HDMI systems (e.g., embedded display interfaces) where protocol-aware switching is unnecessary | Choose NB7L14MNR2G only for custom LVDS-based video routing without HDMI compliance needs. |
Compared with TMDS341APFCR, TMDS341BPFCR offers broader thermal qualification and enhanced ESD robustness for harsher environments, while NB7L14MNR2G provides raw signal multiplexing without HDMI-specific features - making TMDS341APFCR the optimal choice for drop-in HDMI/DVI source aggregation in commercial AV equipment.
Availability
TMDS341APFCR is available at Aetrix Electronics and suitable for digital television, audio/video receiver, and digital projector applications requiring stable component supply, HDMI 1.3a compliance, and production-ready 80-pin TQFP packaging.
Supply support for TMDS341APFCR 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 switching ICs optimized for seamless multi-source video routing in commercial AV equipment - emphasizing signal integrity, protocol compliance, and integration density.
FAQ
What is the maximum supported resolution and color depth for TMDS341APFCR?
The TMDS341APFCR supports resolutions up to 1080i/p and 720i/p at 2.25 Gbps signaling rate with full 12-bit color depth. This enables 1080p60 video transmission with deep color (36-bit RGB) and meets HDMI 1.3a bandwidth requirements without compression or frame dropping.
Does TMDS341APFCR require external termination resistors on TMDS inputs?
No. The TMDS341APFCR integrates 50-Ω termination resistors at each TMDS input pin, pulled to VCC. External terminations are not required - simplifying PCB layout and reducing component count compared to discrete termination solutions.
How does the TMDS341APFCR handle DDC (I²C) communication during source switching?
The TMDS341APFCR isolates unused DDC buses using bi-directional pass-gates. Only the selected port's SDA/SCL lines connect to SDA_SINK/SCL_SINK; others float. This prevents bus contention and ensures clean EDID reads and HDCP authentication without software intervention.
Can TMDS341APFCR be used with 5-V DDC and HPD signals while powered from a 3.3-V supply?
Yes. All DDC (SCL/SDA) and HPD pins are 5-V tolerant. The TMDS341APFCR operates from 3.3 V but accepts 0–5.5 V on DDC lines and 0–5.3 V on HPD_SINK - enabling direct connection to standard HDMI connectors without level shifters.
What is the purpose of the VSADJ pin on TMDS341APFCR, and how is it configured?
The VSADJ pin sets TMDS output differential voltage swing. A 4.64-kΩ ±1% resistor must be connected from VSADJ to ground to achieve compliant 560–840 mVpp output swing. Incorrect resistance causes non-standard TMDS levels, risking interoperability with HDMI sinks.
TMDS341APFCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 80-TQFP
- Packaging:
- Tape & Reel (TR)
- 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
TMDS341APFCR FAQ
1.How can I place an order for TMDS341APFCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TMDS341APFCR 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 TMDS341APFCR reliable?
The price and inventory of TMDS341APFCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMDS341APFCR is usually 5 days.
3.What payment methods are accepted for TMDS341APFCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMDS341APFCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMDS341APFCR?
TMDS341APFCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMDS341APFCR 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 TMDS341APFCR?
For technical support, including TMDS341APFCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMDS341APFCR requirements.
6.How does Aetrix verify that TMDS341APFCR is sourced from the original manufacturer or authorized distributors?
All TMDS341APFCR 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 TMDS341APFCR meets industry standards.
7.What is the process for return or replacement of TMDS341APFCR?
All TMDS341APFCR units undergo pre-shipment inspection (PSI). If there is an issue with TMDS341APFCR, 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 TMDS341APFCR part is unused and in its original packaging.
Return procedure for TMDS341APFCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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