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Texas Instruments TMDS351PAG
- Part No.:
- TMDS351PAG
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 64-TQFP
- Datasheet:
-
TMDS351PAG.pdf
- Description:
- IC INTERFACE SPECIALIZED 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:144
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Product details
Overview
TMDS351PAG from Texas Instruments is a 3-to-1 HDMI/DVI switch IC for digital video routing in consumer AV systems. It supports 2.5 Gbps signaling, 12-bit color depth at 1080p, integrated 50-Ω receiver termination, selectable input equalization (EQ), and operates from dual supplies: 3.3 V for TMDS I/O and 5 V for HPD/DDC logic. It enables multi-source switching in digital TVs and projectors.
For engineers reviewing the TMDS351PAG datasheet, TMDS351PAG pinout, TMDS351PAG application, or TMDS351PAG equivalent, key selection criteria include HDMI 1.3a compliance, intra-pair skew < 40 ps, inter-pair skew < 65 ps, HBM ESD > 8 kV on TMDS inputs, and support for standby-mode DDC/HPD retention with VCC off.
Technical Context
The TMDS351PAG implements a 3-port × 4-channel TMDS switch with independent source selection via S1/S2 control pins, enabling one sink port to route from any of three HDMI/DVI sources. Each TMDS channel includes frequency-responsive equalization (EQ pin) for short (EQ = L) or long (EQ = H) cable lengths up to 15 m.
It integrates 50-Ω on-die receiver terminations per differential input pair, eliminating external resistors, and features high-impedance TMDS outputs during standby when VCC is powered down while VDD remains active to sustain HPD and DDC functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signaling Rate | Up to 2.5 Gbps - supports 1080p @ 12-bit color depth without compression |
| Input Equalization | Selectable via EQ pin: Low for HDMI 1.3-compliant cables; High for 10 m / 28 AWG cables |
| Intra-Pair Skew | < 40 ps - ensures timing alignment within each TMDS data pair (A/B) |
| Inter-Pair Skew | < 65 ps - maintains phase coherence across all four TMDS channels (Y1–Y4/Z1–Z4) |
| ESD Protection | HBM > 8 kV on TMDS inputs - reduces need for external TVS protection in consumer designs |
| Power Supplies | VCC = 3.3 V ±10 % for TMDS I/O; VDD = 5 V ±10 % for HPD/DDC/control logic - enables low-power standby operation |
| Operating Temp | 0°C to +70°C - qualified for commercial-grade digital TV and projector environments |
Pinout & Package
TMDS351PAG is housed in a 64-pin TQFP (PAG) package with exposed thermal pad, RoHS-compliant and rated for 260°C reflow. Pin layout supports symmetric high-speed TMDS routing with dedicated ground planes and controlled-impedance trace routing guidance per TI layout recommendations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A11–A14, A21–A24, A31–A34 | TMDS+ inputs (3 ports × 4 channels) | Positive differential inputs for source ports 1–3; require matched-length routing to maintain signal integrity |
| B11–B14, B21–B24, B31–B34 | TMDS− inputs (3 ports × 4 channels) | Negative differential inputs; paired with corresponding A pins for 100-Ω differential impedance |
| Y1–Y4, Z1–Z4 | TMDS+ and TMDS− outputs (sink) | Single-ended outputs drive HDMI sink; swing set by VSADJ resistor to meet 400–600 mVpp spec |
| S1, S2 | Source select control inputs | LVTTL-compatible logic; define active port per Table 1 (e.g., S1=H/S2=L selects Port 2) |
| EQ | Equalization mode selector | Directly configures receiver gain profile: Low = short-cable mode; High = long-cable compensation |
| HPD1–HPD3, HPD_SINK | Hot-plug detect I/O | 5-V TTL outputs mirror HPD_SINK status for selected port; unselected ports drive low |
| SCL1–SCL3, SDA1–SDA3, SCL_SINK, SDA_SINK | DDC I²C bidirectional lines | 5-V tolerant I/O; internal pass-gates route DDC between selected source and sink without level shifters |
| VCC, VDD, GND | Power and ground | VCC powers TMDS circuitry only; VDD powers HPD/DDC/control logic - enables selective power-down |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 50-Ω receiver termination | Eliminates 12 external 50-Ω resistors and associated PCB area; reduces BOM cost and layout complexity |
| Selectably equalized TMDS receivers | Two EQ modes adapt to cable loss profiles - preserves eye opening for both 3 m (30 AWG) and 15 m (26 AWG) HDMI cables |
| Standby-mode DDC/HPD retention | VCC can be powered off while VDD remains active - maintains hot-plug detection and EDID communication during system sleep |
| Low intra-/inter-pair skew | <40 ps intra-pair and <65 ps inter-pair skew - meets HDMI 1.3a timing margin requirements for 1080p/12-bit |
| VSADJ-controlled output swing | 4.02-kΩ precision resistor sets compliant 500-mVpp (typ) differential output - avoids overdriving HDMI sink receivers |
Applications
| Digital TV | Digital Projector |
|---|---|
Use Scenario: Consumer television with three HDMI inputs (Blu-ray, game console, streaming box) routed to single display engine. IC Role / Device Role / Timing Role: 3-to-1 HDMI switch managing physical layer routing, HPD arbitration, and DDC passthrough under microcontroller control. Use Value: Enables seamless source switching without EDID re-read delays; integrated termination and EQ reduce external components and improve cable-length robustness. | Use Scenario: Home theater projector supporting multiple HD sources with automatic input detection and resolution negotiation. IC Role / Device Role / Timing Role: TMDS signal router with precise skew control and hot-plug-aware DDC handshaking for reliable EDID exchange. Use Value: Intra-pair skew <40 ps ensures clean 1080p clock/data recovery; standby DDC retention allows quick wake-from-sleep source reselection. |
| DVD Player | Game Console |
Use Scenario: Upscaling DVD player with HDMI output and optional secondary video input (e.g., component-to-HDMI converter). IC Role / Device Role / Timing Role: HDMI multiplexer enabling dual-input capability while maintaining full HDMI 1.3a compliance including CEC passthrough. Use Value: Dual-supply architecture allows VCC shutdown during idle - cuts TMDS-related quiescent current to near zero while preserving HPD readiness. | Use Scenario: Next-gen gaming console requiring simultaneous HDMI input (for capture card passthrough) and output to display. IC Role / Device Role / Timing Role: Bidirectional HDMI switch element supporting source selection and sink-side TMDS conditioning for low-jitter video transmission. Use Value: 2.5 Gbps rate and 8 kV HBM ESD rating protect against field failures in high-touch consumer environments; EQ pin adapts to varying cable quality. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar HDMI switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TMDS341APAG | 2-to-1 HDMI switch; same 64-pin TQFP package, identical VCC/VDD supplies, but lacks third input port and EQ control | Restricted to dual-source systems; no long-cable equalization - unsuitable for 10 m+ HDMI runs | Select when only two HDMI sources are required and board space/layout reuse of PAG footprint is critical |
| ON Semi NB7L572MNR2G | 3-to-1 LVDS/PECL switch; 3.3 V only, no integrated HPD/DDC, no HDMI-specific equalization or termination | Requires external level shifters, HPD logic, and DDC muxing; not HDMI plug-and-play ready | Choose for non-HDMI differential protocols where TI's HDMI-optimized features are unnecessary |
Compared with TMDS341APAG, TMDS351PAG adds a third input and EQ control for extended cable reach; compared with NB7L572MNR2G, it delivers full HDMI 1.3a system integration - eliminating discrete HPD/DDC management and reducing total solution component count by ≥7.
Availability
TMDS351PAG is available at Aetrix Electronics and suitable for digital TV, digital projector, DVD player, and game console designs requiring stable component supply, HDMI 1.3a compliance, and production-ready signal integrity.
Supply support for TMDS351PAG 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 technologies for industrial, automotive, and consumer markets.
The TMDS351PAG belongs to TI's HDMI interface product line, designed specifically to simplify high-bandwidth digital video routing in cost-sensitive, space-constrained consumer AV equipment with minimal external components.
FAQ
What is the maximum supported resolution and color depth for TMDS351PAG?
The TMDS351PAG supports up to 1080p resolution at 12-bit color depth, enabled by its 2.5 Gbps per-channel signaling rate. This meets HDMI 1.3a specifications and accommodates deep color formats used in premium digital TVs and projectors. The TMDS351PAG achieves this using integrated equalization and low-skew output drivers to preserve signal integrity at high data rates.
How does the EQ pin affect TMDS351PAG performance with different HDMI cables?
When EQ = Low, the TMDS351PAG applies minimal equalization optimized for short HDMI 1.3-compliant cables (e.g., 3 m, 30 AWG). When EQ = High, it activates stronger high-frequency boost to compensate for attenuation in longer cables (e.g., 10 m, 28 AWG). This dual-mode design ensures robust eye opening across real-world cable variations without requiring manual tuning or external components.
Can TMDS351PAG operate in low-power standby mode while retaining HPD and DDC functionality?
Yes. The TMDS351PAG supports true standby operation: VCC (3.3 V) can be powered off to disable TMDS I/O and switching circuits, while VDD (5 V) remains active to sustain HPD status monitoring and DDC I²C communication. This allows the host system to maintain hot-plug awareness and EDID access during sleep - a key requirement for modern energy-efficient digital TVs and projectors using TMDS351PAG.
What is the purpose of the VSADJ pin on TMDS351PAG, and what resistor value is required?
The VSADJ pin on TMDS351PAG sets the TMDS output voltage swing via an external precision resistor to ground. A 4.02-kΩ ±1% resistor is specified to achieve the HDMI-compliant 500-mVpp (typical) differential output. Deviations outside the 3.66–4.47 kΩ range risk noncompliance - either underswing (signal integrity loss) or overswing (receiver damage or EMI issues). The TMDS351PAG datasheet provides exact test conditions for validation.
Does TMDS351PAG require external termination resistors on its TMDS inputs?
No. The TMDS351PAG integrates 50-Ω termination resistors at each TMDS receiver input (A11–A34, B11–B34), pulled to VCC. External terminations are not required, simplifying layout and reducing BOM count. These internal terminations are automatically enabled only for the selected source port - minimizing power draw and crosstalk from inactive inputs. This feature is confirmed in the TMDS351PAG functional description and pin table.
TMDS351PAG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-TQFP
- Packaging:
- Bulk
- Product Status:
- Active
- Applications:
- 3:1 Switchable DVI/HDMI Receiver
- Interface:
- DVI, HDMI
- Voltage - Supply:
- 3V ~ 3.6V
- Supplier Device Package:
- 64-TQFP (10x10)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
TMDS351PAG FAQ
1.How can I place an order for TMDS351PAG through Aetrix?
Please submit a Request for Quotation (RFQ) for TMDS351PAG 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 TMDS351PAG reliable?
The price and inventory of TMDS351PAG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMDS351PAG is usually 5 days.
3.What payment methods are accepted for TMDS351PAG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMDS351PAG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMDS351PAG?
TMDS351PAG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMDS351PAG 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 TMDS351PAG?
For technical support, including TMDS351PAG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMDS351PAG requirements.
6.How does Aetrix verify that TMDS351PAG is sourced from the original manufacturer or authorized distributors?
All TMDS351PAG 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 TMDS351PAG meets industry standards.
7.What is the process for return or replacement of TMDS351PAG?
All TMDS351PAG units undergo pre-shipment inspection (PSI). If there is an issue with TMDS351PAG, 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 TMDS351PAG part is unused and in its original packaging.
Return procedure for TMDS351PAG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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