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Texas Instruments SN75DP122ARTQT
- Part No.:
- SN75DP122ARTQT
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
SN75DP122ARTQT.pdf
- Description:
- IC INTERFACE SPECIALIZED 56QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,324
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Product details
Overview
SN75DP122ARTQT from Texas Instruments is a Dual-Mode DisplayPort 1:2 switch IC with integrated TMDS level translation, supporting up to 2.7 Gbps DP and 2.5 Gbps TMDS data rates. It routes one DP input to either a DP output (port A) or a TMDS output (port B), while switching AUX/HPD/CAD channels and enabling HDMI/DVI connector recognition via I2C logic. Used in notebook docking stations and GPU video routing.
For engineers reviewing the SN75DP122ARTQT datasheet, SN75DP122ARTQT pinout, SN75DP122ARTQT application, or SN75DP122ARTQT equivalent, this page delivers verified signal integrity specs, dual-mode port selection behavior, ESD robustness (12 kV HSP, 8 kV AUX/I²C), QFN-56 package mapping, and real-world timing constraints for DP++ and HDMI/DVI interoperability.
Technical Context
The SN75DP122ARTQT implements a 2-to-1 MUX architecture with independent receiver equalization on the DP input path and active waveform mirroring on the DP output. Its internal switching logic uses HPD_SINK and TMDS_HPD_SINK states plus Priority pin to arbitrate between DP and TMDS ports.
It integrates a bidirectional AUX channel that operates as DisplayPort differential AUX when CAD_SINK = LOW and as I²C repeater (SCL/SDA) when CAD_SINK = HIGH, with configurable gain via DPVadj (6.49 kΩ nominal) and TMDS voltage swing control via VSadj (5.11 kΩ compliant).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DP Data Rate | Up to 2.7 Gbps - supports DisplayPort 1.1a full-bandwidth main link operation |
| TMDS Data Rate | Up to 2.5 Gbps - compliant with DVI 1.0 and HDMI 1.3b pixel clock and data timing |
| ESD Protection | 12 kV HBM on high-speed pins; 8 kV HBM on AUX/I²C pins - meets system-level surge immunity requirements |
| Operating Temperature | 0°C to +85°C ambient - qualified for commercial desktop, notebook, and docking station environments |
| Supply Voltages | VDD = 4.5–5.25 V (DP logic & outputs); VCC = 3.0–3.6 V (TMDS translator) - dual-rail power architecture |
| Package | 56-pin 8 mm × 8 mm QFN (RTQT) - exposed thermal pad for 11.03°C/W junction-to-board dissipation |
| Power Dissipation | 305 mW typical (DP selected); 420 mW typical (TMDS selected) - enables thermal-aware PCB layout |
Pinout & Package
SN75DP122ARTQT is housed in a 56-pin QFN (8 mm × 8 mm, 0.5 mm pitch) with exposed thermal pad (pin 54). Pin functions are validated per TI SLLS939 datasheet Rev. NOVEMBER 2008.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ML_IN 0(p/n) to ML_IN 3(p/n) | DP main link differential inputs | Accepts four-lane DP 1.1a input; supports receiver equalization for lossy traces |
| DP_SINK 0(p/n) to DP_SINK 3(p/n) | DP port A differential outputs | Replicates input waveform characteristics; gain adjustable via DPVadj resistor |
| TMDS_SINK 0/1/2(p/n), CLK(p/n) | TMDS port B differential outputs | Compliant with DVI/HDMI voltage swing (800–1200 mVpp); fine-tuned by VSadj |
| AUX_SINK(p/n), AUX_I2C(p/n) | Bidirectional auxiliary interface | Switches between DP AUX (CAD_SINK = LOW) and I²C repeater (CAD_SINK = HIGH) |
| DP_HPD_SINK, TMDS_HPD_SINK | Hot plug detect inputs | Used with Priority pin to select active output port; drives HPD output accordingly |
| CAD_SINK, CAD | Cable adapter detect I/O | Determines AUX mode; propagates to CAD output only when DP port is selected |
| I2C_EN, I2C_SCL/SDA | HDMI/DVI connector ID logic | Enables internal register readout (HDMI vs DVI) when TMDS port is active |
| LP, Priority, DPVadj, VSadj | Configuration control inputs | Enable low-power state, set port priority, adjust DP gain, and calibrate TMDS swing |
Key Features
| Feature | Design Value |
|---|---|
| Integrated TMDS level translator | Eliminates need for external level-shifting circuitry between DP source and DVI/HDMI sink |
| Dual-mode DisplayPort support | Enables single-source connection to both DP-native and legacy HDMI/DVI displays |
| Waveform-mimicking DP output | Maintains input jitter, edge rate, and skew fidelity - critical for EMI-compliant spread-spectrum clocking |
| Configurable gain & swing control | DPVadj and VSadj pins allow board-level tuning of output amplitude for system margin optimization |
| Enhanced ESD protection | 12 kV HBM on DP lanes ensures robustness against handling and cable-insertion transients |
| I²C-based connector recognition | Internal register identifies HDMI vs DVI via I2C_EN enables automatic EDID routing and HDCP handshake setup |
Applications
| Desktop Video Routing | Notebook Docking Station |
|---|---|
Use Scenario: Desktop PC with discrete GPU outputs DisplayPort signal to dual monitors - one native DP, one HDMI. IC Role / Device Role / Timing Role: SN75DP122ARTQT acts as intelligent DP-to-DP/HDMI switch, managing lane routing, AUX channel translation, and HPD arbitration. Use Value: Enables single GPU output to drive heterogeneous display ecosystem without firmware reconfiguration or manual adapter swapping. |
Use Scenario: Notebook dock with DP input connects to external HDMI monitor and DP monitor simultaneously. IC Role / Device Role / Timing Role: SN75DP122ARTQT serves as DP++ hub controller, dynamically selecting output port based on HPD status and CAD detection. Use Value: Delivers plug-and-play multi-display support with zero latency port switching and guaranteed TMDS compliance at 2.5 Gbps. |
| GPU Reference Design | Standalone Video Card |
Use Scenario: GPU reference board includes DP++ output supporting both DP and HDMI display connections. IC Role / Device Role / Timing Role: SN75DP122ARTQT provides signal integrity-preserving DP lane replication and TMDS translation with minimal added jitter (<35 ps PP). Use Value: Reduces reference design validation time by integrating certified DVI/HDMI electrical compliance and AUX protocol bridging. |
Use Scenario: Add-in video card adds DP++ capability to legacy systems lacking native HDMI output. IC Role / Device Role / Timing Role: SN75DP122ARTQT functions as DP-to-TMDS bridge with built-in I²C repeater for DDC/EDID communication. Use Value: Eliminates need for separate level shifter, I²C buffer, and HPD logic - reduces BOM count and PCB area by >30%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DisplayPort-to-TMDS switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN75DP130RTQT | 2:2 DP switch with dual TMDS translators; supports simultaneous DP+HDMI output (no mux arbitration) | Used where concurrent dual-output operation is required instead of 1:2 port selection | Select SN75DP130RTQT when system needs independent DP and HDMI sinks active at once. |
| PI3DPX1202ZLEX | Single-supply (3.3 V) DP++ switch; no dedicated VDD rail; lower ESD (8 kV HBM on DP lanes) | Targeted at space-constrained mobile designs; lacks DPVadj/VSadj tuning and I²C connector ID logic | Choose PI3DPX1202ZLEX for cost-sensitive, low-power embedded graphics where tuning and HDMI/DVI differentiation are not required. |
Compared with SN75DP122ARTQT, SN75DP130RTQT enables parallel output but increases complexity and power; PI3DPX1202ZLEX reduces supply count and footprint but sacrifices gain control, ESD margin, and HDMI/DVI auto-detection - making SN75DP122ARTQT optimal for robust, feature-complete DP++ docking solutions.
Availability
SN75DP122ARTQT is available at Aetrix Electronics and suitable for desktop PC video routing, notebook docking station design, and standalone GPU video card development requiring stable component supply across production lifecycles.
Supply support for SN75DP122ARTQT 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 with over 50 years of innovation in signal chain and power management ICs.
The SN75DP122ARTQT belongs to TI's DisplayPort interface product line, engineered specifically for DP++ (Dual-Mode DisplayPort) applications requiring seamless interoperability between DisplayPort sources and HDMI/DVI sinks.
FAQ
What is the primary function of the SN75DP122ARTQT?
The SN75DP122ARTQT is a DisplayPort 1:2 switch IC that routes a single Dual-Mode DisplayPort input to either a DisplayPort output or a TMDS output compliant with HDMI 1.3b and DVI 1.0. It handles main link, AUX, HPD, and CAD signal switching while providing integrated level translation, gain control, and connector identification logic - all within the SN75DP122ARTQT device.
Does the SN75DP122ARTQT support simultaneous DP and HDMI output?
No, the SN75DP122ARTQT is a 1:2 selector, not a splitter - it routes the input to only one output port at a time. Port selection is determined by HPD status on DP_HPD_SINK and TMDS_HPD_SINK pins plus the Priority pin. Simultaneous output requires a different device such as the SN75DP130RTQT, not the SN75DP122ARTQT.
How does the SN75DP122ARTQT handle AUX channel protocol translation?
The SN75DP122ARTQT switches the AUX channel between DisplayPort differential mode (when CAD_SINK = LOW) and I²C repeater mode (when CAD_SINK = HIGH). In I²C mode, it isolates parasitics and enables DDC/EDID communication over TMDS links. This dual-mode behavior is intrinsic to the SN75DP122ARTQT and requires no external configuration beyond CAD_SINK pin state.
What are the supply voltage requirements for the SN75DP122ARTQT?
The SN75DP122ARTQT requires two supplies: VDD = 4.5–5.25 V powers the DisplayPort interface and digital logic, while VCC = 3.0–3.6 V powers the TMDS level translator. VDD*1 (HPD/CAD reference) must match VDD. These rails are strictly separated per the SN75DP122ARTQT datasheet to ensure signal integrity and compliance.
Can the SN75DP122ARTQT be used in automotive infotainment systems?
The SN75DP122ARTQT is characterized for 0°C to +85°C ambient operation and is not qualified for automotive AEC-Q100 temperature grades or vibration/shock requirements. While functionally capable of video switching, its commercial-grade qualification makes it unsuitable for automotive infotainment without additional system-level validation - TI does not recommend the SN75DP122ARTQT for automotive use cases.
SN75DP122ARTQT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 56-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- DVI, HDMI Signal Switching
- Interface:
- TMDS
- Voltage - Supply:
- 4.5V ~ 5.25V
- Supplier Device Package:
- 56-QFN (8x8)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
SN75DP122ARTQT FAQ
1.How can I place an order for SN75DP122ARTQT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN75DP122ARTQT 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 SN75DP122ARTQT reliable?
The price and inventory of SN75DP122ARTQT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN75DP122ARTQT is usually 5 days.
3.What payment methods are accepted for SN75DP122ARTQT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN75DP122ARTQT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN75DP122ARTQT?
SN75DP122ARTQT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN75DP122ARTQT 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 SN75DP122ARTQT?
For technical support, including SN75DP122ARTQT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN75DP122ARTQT requirements.
6.How does Aetrix verify that SN75DP122ARTQT is sourced from the original manufacturer or authorized distributors?
All SN75DP122ARTQT 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 SN75DP122ARTQT meets industry standards.
7.What is the process for return or replacement of SN75DP122ARTQT?
All SN75DP122ARTQT units undergo pre-shipment inspection (PSI). If there is an issue with SN75DP122ARTQT, 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 SN75DP122ARTQT part is unused and in its original packaging.
Return procedure for SN75DP122ARTQT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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