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Texas Instruments TMDS261BPAGR
- Part No.:
- TMDS261BPAGR
- Manufacturer:
- Texas Instruments
- Category:
- Video Processing
- Package:
- 64-TQFP
- Datasheet:
-
TMDS261BPAGR.pdf
- Description:
- IC VIDEO HDMI/DVI SWITCH 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,126
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Product details
Overview
TMDS261BPAGR from Texas Instruments is a 2:1 HDMI/DVI sink-side switch IC supporting up to 3 Gbps signaling, 1080p/16-bit color, and adaptive equalization for up to 20-m cables. It integrates TMDS clock detection, DDC repeater, and HPD management for display terminal switching in digital TVs and set-top boxes.
For engineers reviewing the TMDS261BPAGR datasheet, TMDS261BPAGR pinout, TMDS261BPAGR application, or TMDS261BPAGR equivalent, key selection criteria include HDMI 1.3a compliance, 64-pin TQFP package compatibility with TMDS251, adaptive equalizer gain control, and dual-mode (I²C/GPIO) configuration for sink-side video routing.
Technical Context
The TMDS261BPAGR implements a sink-side 2×1 multiplexer architecture with independent TMDS receiver stages per input port, each featuring adaptive equalization that compensates for up to 20 dB of intersymbol interference at 3 Gbps. Its clock-detect circuit enables automatic power gating of unselected ports' terminations and outputs.
It supports two control modes: I²C slave interface (with register-accessible TMDS edge-rate control, DDC buffer OVS settings, and clock-detect bypass) and GPIO mode (using S1/S2 pins for port selection and LP pin for low-power entry). The VSadj pin allows system-level tuning of TMDS output swing via external resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Data Rate | 3 Gbps - supports HDMI 1.3a 1080p @ 16-bit color depth and DVI 1.0 HDTV resolutions |
| Input Equalization | Adaptive up to 20 dB - enables reliable operation over 20-m HDMI cables at 2.25 Gbps |
| Supply Voltage | 3.3 V ±0.3 V - single-supply operation compatible with standard logic rails |
| Operating Temp | 0°C to 70°C - qualified for commercial-grade consumer electronics environments |
| ESD Rating | HBM ±10 kV on TMDS/DDC/HPD pins - robust protection for HDMI source-side connector exposure |
| Power Modes | Normal (780 mW), Standby (20 mW), Low-Power (2 μW) - configurable via LP pin or I²C |
| DDC Buffer | I²C repeater with OVS-selectable sink-side VOL - isolates source/sink capacitance for system-level HDMI compliance |
Pinout & Package
TMDS261BPAGR is housed in a 64-pin TQFP (PAG-64) package, pin-compatible with TMDS251. The package features exposed thermal pad for enhanced heat dissipation in high-speed video applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK+_1 / CLK–_1 D[0:2]+_1 / D[0:2]–_1 | Port-1 TMDS differential inputs | Accepts HDMI/DVI source signals; adaptive equalizer applies per-channel ISI compensation |
| CLK+_2 / CLK–_2 D[0:2]+_2 / D[0:2]–_2 | Port-2 TMDS differential inputs | Second independent HDMI/DVI input path with identical signal conditioning and termination |
| CLK+_SINK / CLK–_SINK D[0:2]+_SINK / D[0:2]–_SINK | TMDS sink differential outputs | Drives downstream HDMI receiver; edge rate configurable via I²C registers or fixed in GPIO mode |
| SCL_SINK / SDA_SINK | Sink-side DDC I²C interface | Connects to display controller; buffers source-side DDC traffic to meet HDMI compliance capacitance limits |
| HPD_SINK | Sink hot-plug detect input | Monitors display readiness; controls HPD1/HPD2 outputs to upstream sources during port selection |
| S1/SCL / S2/SDA / I2C_SEL / LP / VSadj | Configuration & control | Selects active port (GPIO), enables I²C mode, forces low-power state, or tunes output voltage swing |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive equalization | Automatically adjusts gain per input channel to maintain signal integrity across variable cable lengths up to 20 m |
| TMDS clock-detect circuit | Enables zero-power idle on inactive ports by disconnecting terminations and placing outputs in high-Z until valid clock is present |
| DDC I²C repeater with OVS | Three selectable sink-side VOL levels (OVS1–OVS3) allow tuning to meet HDMI sink-side VIL/VOL requirements |
| VSadj-controlled output swing | External 4.02 kΩ±10% resistor sets TMDS-compliant differential output voltage (800–1200 mVpp) |
| Robust TMDS receive stage | Operates with non-compliant input common-mode voltages (VCC – 0.4 V to VCC + 0.01 V), easing source interoperability |
Applications
| High-Definition Digital TV | LCD/Plasma/DLP® Display Terminal |
|---|---|
Use Scenario: Switching between Blu-ray player and gaming console on a single HDMI input of an HDTV chassis. IC Role / Device Role / Timing Role: Sink-side 2:1 TMDS multiplexer managing hot-plug detection, DDC handshaking, and adaptive signal equalization. Use Value: Enables seamless source switching without display retraining; adaptive EQ maintains pixel-perfect 1080p timing over long internal PCB traces. | Use Scenario: Integrating dual HDMI inputs into a commercial LCD monitor with embedded scaler and OSD controller. IC Role / Device Role / Timing Role: HDMI sink interface hub providing isolated DDC buffering, HPD arbitration, and TMDS signal conditioning before the receiver ASIC. Use Value: Eliminates DDC bus contention between sources; OVS-selectable sink-side VOL ensures reliable I²C communication under varying PCB loading. |
| DVD Player or DVR Back-End Interface | Gaming Console Video Output Routing |
Use Scenario: Adding HDMI output capability to legacy DVD players using discrete HDMI transmitter ICs. IC Role / Device Role / Timing Role: Signal conditioner and switch between multiple video processors feeding a single HDMI PHY layer. Use Value: Compensates for signal degradation from multi-layer board routing; <2-mW low-power mode reduces standby consumption when no source is active. | Use Scenario: Supporting simultaneous HDMI output to primary display and secondary capture device in next-gen game consoles. IC Role / Device Role / Timing Role: Dual-input sink switch enabling dynamic routing of high-bandwidth video streams while maintaining HDCP handshake continuity. Use Value: Clock-detect feature prevents false HPD assertion during GPU clock gating; fast port-switching (<500 ns) avoids frame drops during real-time routing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar HDMI sink-switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMDS251PAGR | Single-port HDMI switch; no adaptive equalization; fixed 100-Ω input termination; lacks VSadj and OVS control | Targeted at short-cable (<3 m), fixed-source designs where signal integrity is guaranteed by layout | Choose TMDS251PAGR only if cable length is ≤3 m and system-level DDC isolation is handled externally |
| PI3HDX1204ZLEX | 4:1 HDMI 2.0 switch; supports 6 Gbps; integrated level shifters; no built-in DDC repeater; requires external I²C mux | Designed for multi-source AV receivers and docking stations requiring >2 inputs and higher bandwidth | Choose PI3HDX1204ZLEX when scaling beyond 2 inputs or supporting 4K@60Hz; verify external DDC routing meets HDMI spec |
Compared with TMDS251PAGR, TMDS261BPAGR adds adaptive equalization and DDC repeater functionality essential for long-cable or mixed-source systems; compared with PI3HDX1204ZLEX, it offers simpler integration for dual-input consumer displays but lacks HDMI 2.0 bandwidth and multi-port flexibility.
Availability
TMDS261BPAGR is available at Aetrix Electronics and suitable for high-definition digital TV, LCD/Plasma display terminals, and DVD player or DVR applications requiring stable component supply and HDMI 1.3a compliance.
Supply support for TMDS261BPAGR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The TMDS261BPAGR belongs to TI's HDMI interface product line, engineered specifically for sink-side video routing in cost-sensitive, space-constrained consumer displays with emphasis on signal integrity, ESD robustness, and system-level compliance.
FAQ
What is the maximum supported HDMI resolution and color depth for TMDS261BPAGR?
The TMDS261BPAGR supports HDMI 1.3a-compliant operation up to 1080p resolution with 16-bit color depth at 3 Gbps data rate. It achieves this through adaptive equalization that compensates for signal loss over long cables and precise TMDS output swing control via the VSadj pin. The device does not support HDMI 2.0 or higher specifications such as 4K@60Hz.
How does the TMDS261BPAGR handle hot-plug detection across multiple sources?
The TMDS261BPAGR uses HPD_SINK as the master hot-plug input and drives HPD1 and HPD2 outputs to upstream sources. When Port 1 is selected, HPD1 follows HPD_SINK while HPD2 is pulled low; when Port 2 is selected, HPD2 follows HPD_SINK and HPD1 goes low. This ensures only the active source receives a valid HPD signal, preventing spurious EDID reads from inactive ports.
Can TMDS261BPAGR operate in both I²C and GPIO control modes simultaneously?
No, TMDS261BPAGR operates exclusively in one control mode at a time, determined by the logic level on the I2C_SEL pin. When I2C_SEL is low, the device enters I²C slave mode with full register access; when high, it enters GPIO mode where S1/S2 select the port and LP controls low-power state. Mixing modes is not supported and may result in indeterminate behavior.
What is the purpose of the VSadj pin on TMDS261BPAGR, and what resistor value is required?
The VSadj pin on TMDS261BPAGR sets the TMDS output differential voltage swing by connecting an external precision resistor. A 4.02 kΩ±10% resistor is required to achieve HDMI-compliant 800–1200 mVpp output. Deviations outside this tolerance risk failing HDMI electrical compliance tests, particularly the TMDS termination-voltage measurement.
Does TMDS261BPAGR support HDCP or audio data path switching?
No, TMDS261BPAGR is a physical-layer TMDS switch only and does not process, decrypt, or route HDCP authentication or audio data. It passes encrypted TMDS video streams transparently but requires external HDCP controllers (e.g., separate HDCP repeater ICs or SoC-integrated engines) to manage key exchange and content protection. Audio remains embedded in the TMDS stream and is not separated or modified.
TMDS261BPAGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-TQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Switch
- Applications:
- Video Display
- Standards:
- HDMI 1.3a
- Control Interface:
- GPIO, I2C
- Voltage - Supply:
- 3.0V ~ 3.6V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 64-TQFP (10x10)
TMDS261BPAGR FAQ
1.How can I place an order for TMDS261BPAGR through Aetrix?
Please submit a Request for Quotation (RFQ) for TMDS261BPAGR 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 TMDS261BPAGR reliable?
The price and inventory of TMDS261BPAGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMDS261BPAGR is usually 5 days.
3.What payment methods are accepted for TMDS261BPAGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMDS261BPAGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMDS261BPAGR?
TMDS261BPAGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMDS261BPAGR 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 TMDS261BPAGR?
For technical support, including TMDS261BPAGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMDS261BPAGR requirements.
6.How does Aetrix verify that TMDS261BPAGR is sourced from the original manufacturer or authorized distributors?
All TMDS261BPAGR 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 TMDS261BPAGR meets industry standards.
7.What is the process for return or replacement of TMDS261BPAGR?
All TMDS261BPAGR units undergo pre-shipment inspection (PSI). If there is an issue with TMDS261BPAGR, 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 TMDS261BPAGR part is unused and in its original packaging.
Return procedure for TMDS261BPAGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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