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Texas Instruments TMDS461PZT
- Part No.:
- TMDS461PZT
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 100-TQFP
- Datasheet:
-
TMDS461PZT.pdf
- Description:
- IC INTERFACE SPECIALIZED 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,158
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Product details
Overview
TMDS461PZT from Texas Instruments is a 4-to-1 HDMI/DVI switch IC designed for sink-side video routing in high-definition displays. It supports 1080p resolution at up to 3 Gbps per TMDS channel, delivers adaptive equalization for up to 20-m HDMI cables, and integrates DDC repeater functionality with robust 10-kV HBM ESD protection on all TMDS and DDC pins.
For engineers reviewing the TMDS461PZT datasheet, TMDS461PZT pinout, TMDS461PZT application, or TMDS461PZT equivalent, this device is critical for HDMI switching in LCD/Plasma/DLP TVs where automatic port selection, low-power mode (<2 mW), and TMDS clock-detect–driven power management must be validated against system-level compliance requirements.
Technical Context
The TMDS461PZT implements an analog adaptive equalizer per input port that compensates for intersymbol interference (ISI) loss up to 20 dB at 3 Gbps, enabling reliable signal integrity over long HDMI cables. Its TMDS receive stage tolerates non-compliant common-mode voltage levels, and its integrated 50-Ω terminations are dynamically enabled only on the selected port's clock and data lines after valid TMDS clock detection.
Control is implemented via dual-path interface: local I²C (slave-only, 7-bit address 0x2D/0x2C) for full register access-including TMDS edge-rate control, DDC buffer offset selection (OVS), and Automatic Port Select-or GPIO mode using S1/S2 pins for port selection and LP pin for low-power entry. IRQ behavior differs by mode: system-interrupt indicator in I²C mode; selected-port clock-detect flag in GPIO mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Data Rate | 3 Gbps per TMDS channel - supports 1080p @ 16-bit color depth and Deep Color formats |
| Equalization Range | Up to 20 dB ISI compensation - enables stable operation with 20-m passive HDMI cables at full rate |
| ESD Protection | 10 kV HBM on TMDS/DDC pins - meets stringent source-side surge requirements in consumer TV interfaces |
| Power Modes | Normal (792 mW), Standby (20 mW), Low-Power (2 mW) - enables dynamic power scaling based on signal presence |
| Supply Voltage | 3.3 V ±10% - single-rail operation compatible with standard display logic supplies |
| Operating Temp | 0°C to 70°C - qualified for commercial-grade flat-panel display environments |
| DDC Buffer Offset | Three selectable VOL/VIL ranges via OVS pin - ensures sink-side DDC bus capacitance isolation per HDMI spec |
Pinout & Package
TMDS461PZT is housed in a 100-pin TQFP (PZT) package with exposed thermal pad, optimized for thermal dissipation in compact display PCB layouts. Pin assignments support four independent HDMI/DVI input ports (each with CLK±, D0±, D1±, D2±, HPD, 5V_PWR, SCL/SDA), one unified TMDS sink output (CLK±_SINK, D0±_SINK, D1±_SINK, D2±_SINK), and dual-control interfaces (I²C: Local_SCL/SDA/Addr; GPIO: S1/S2/LP/I2C_SEL).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK±_[1:4], D[0:2]±_[1:4] | TMDS differential inputs | Four fully isolated input channels accepting HDMI/DVI signals up to 3 Gbps; each includes adaptive equalization and clock-detect circuitry |
| CLK±_SINK, D[0:2]±_SINK | TMDS differential output | Single unified sink-side output driving display receiver; termination resistors switched in only when active port is selected |
| SCL[1:4]/SDA[1:4], SCL_SINK/SDA_SINK | DDC bidirectional I²C buses | Isolated DDC paths per source port + sink port; internal buffer prevents capacitance coupling between sources and sink |
| HPD[1:4], HPD_SINK | Hot-plug detect interface | HPD outputs follow 5V_PWR for unselected ports and HPD_SINK for selected port - enables plug-and-play detection without external logic |
| S1/S2, LP, I2C_SEL | Mode and port control | GPIO-selectable port (S1/S2), hardware low-power enable (LP), and interface mode selection (I2C_SEL) - no firmware dependency for basic operation |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Equalization | Analog per-port equalizer automatically adjusts gain to compensate for cable loss up to 20 dB at 3 Gbps - eliminates need for external redrivers in mid-length cable designs |
| Dynamic Termination Control | 50-Ω terminations enabled only on selected port's TMDS lines after clock detection - reduces standby power and avoids signal reflections on inactive ports |
| DDC Repeater Isolation | Three programmable DDC buffer offset settings (via OVS pin) maintain sink-side I²C timing margins across varying source capacitance - ensures HDMI compliance in multi-source systems |
| Automatic Port Selection | I²C-configurable priority-based port auto-selection driven by 5V_PWR presence - enables zero-touch source switching in smart TVs without MCU intervention |
| Robust Input Stage | TMDS receivers tolerate non-compliant common-mode voltages - accommodates legacy or marginally compliant HDMI sources without signal degradation |
Applications
| Home Theater AV Receiver | Smart TV Video Switching Hub |
|---|---|
Use Scenario: Central HDMI switch aggregating Blu-ray player, game console, streaming box, and cable box into single display path. IC Role / Device Role / Timing Role: Sink-side 4:1 TMDS multiplexer with DDC repeater and HPD arbitration - manages hot-plug events and EDID handshaking across all sources. Use Value: Eliminates manual input switching; adaptive equalization maintains pixel-perfect 1080p/Deep Color over 15-m cables; <2 mW low-power mode extends standby efficiency. | Use Scenario: Integrated HDMI switch in 4K-capable LCD TV supporting simultaneous connection of multiple peripherals. IC Role / Device Role / Timing Role: Display controller–facing TMDS switch with automatic port selection and clock-detect–driven power gating - reduces system-level power during idle source states. Use Value: Enables instant source switching via remote; VSadj resistor tuning ensures HDMI compliance across panel variants; 10-kV ESD protects against user-handling surges. |
| Professional Digital Signage Controller | HDMI Matrix Distribution System |
Use Scenario: Commercial signage unit cycling content from four media players across multiple displays in retail environments. IC Role / Device Role / Timing Role: Reliable 4-input HDMI switch with robust HPD handling and DDC isolation - prevents EDID corruption when sources power-cycle asynchronously. Use Value: Maintains stable video output during source transitions; GPIO control allows simple microcontroller integration; thermal design supports 24/7 operation in enclosed enclosures. | Use Scenario: Rack-mounted HDMI matrix distributing four source feeds to multiple monitors in control rooms or broadcast studios. IC Role / Device Role / Timing Role: High-reliability TMDS switching element with I²C-configurable edge-rate control - suppresses EMI emissions during high-speed switching in dense RF environments. Use Value: Four independent TMDS paths ensure no crosstalk; programmable rise/fall times meet FCC Class B limits; 100-pin TQFP enables automated assembly and thermal management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar HDMI/DVI switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TMDS460PZT | No Automatic Port Select feature; fixed GPIO-only control; lacks I²C register access for edge-rate or OVS tuning | Suitable only for static port selection; cannot support auto-switching or DDC compliance tuning | Select TMDS461PZT when Automatic Port Select, I²C configurability, or DDC offset adjustment is required |
| ON Semiconductor NB7L14MNR2G | Dedicated 4:1 LVDS/PECL switch; no integrated HDMI-specific functions (DDC, HPD, equalization, or TMDS termination) | Requires external level-shifting, termination, and protocol logic; not HDMI-compliant out-of-box | Select TMDS461PZT for turnkey HDMI switching; use NB7L14MNR2G only in custom high-speed digital interconnects with full protocol stack implementation |
Compared with TMDS460PZT, TMDS461PZT adds I²C-configurable features and auto-selection; compared with NB7L14MNR2G, it provides full HDMI physical-layer integration - making TMDS461PZT the only drop-in solution for compliant, low-risk HDMI sink-side switching in volume consumer displays.
Availability
TMDS461PZT is available at Aetrix Electronics and suitable for high-definition TV manufacturing, professional digital signage deployment, and HDMI matrix system integration requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TMDS461PZT 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 applications.
The TMDS461PZT belongs to TI's HDMI interface product line, engineered specifically for sink-side video routing in flat-panel displays - balancing signal integrity, power efficiency, and HDMI specification compliance in cost-sensitive consumer electronics.
FAQ
What is the maximum supported HDMI resolution and color depth for TMDS461PZT?
The TMDS461PZT supports HDMI resolutions up to 1080p with 16-bit color depth, enabled by its 3 Gbps per-channel signaling capability. This meets HDMI 1.3a specifications and accommodates Deep Color formats. The device does not support 4K/UHD resolutions, as those require higher data rates beyond its 3 Gbps limit. TMDS461PZT is optimized for full HD consumer displays, not ultra-high-definition applications.
How does the adaptive equalization in TMDS461PZT improve signal integrity?
The TMDS461PZT implements analog per-port adaptive equalization that compensates for intersymbol interference (ISI) loss up to 20 dB at 3 Gbps - equivalent to signal degradation over ~20 meters of passive HDMI cable. It automatically adjusts gain based on incoming data rate and cable characteristics, restoring signal eye opening without requiring external redrivers or firmware calibration. This ensures robust 1080p transmission in real-world cabling scenarios where TMDS461PZT is deployed.
Can TMDS461PZT operate in both I²C and GPIO control modes simultaneously?
No, TMDS461PZT operates exclusively in one control mode at a time, selected by the logic level on the I2C_SEL pin: high for I²C mode (slave-only interface with 7-bit addresses 0x2C/0x2D), low for GPIO mode (port selection via S1/S2 pins). The two modes are mutually exclusive and cannot be mixed. TMDS461PZT does not support hybrid or runtime mode switching - configuration is hardware-determined at power-up.
What is the role of the VSadj pin on TMDS461PZT, and what resistor value is recommended?
VSadj on TMDS461PZT controls TMDS output voltage swing to aid HDMI compliance testing. A 4.02 kΩ ±10% resistor between VSadj and ground sets the compliant swing range (VID(pp) = 1.56 V typical). Deviations outside this range may cause failure in HDMI sink-side termination voltage tests. The resistor value is specified in the TMDS461PZT datasheet and must be precisely matched to ensure interoperability with certified HDMI receivers.
Does TMDS461PZT support hot-plug detection for all four input ports independently?
Yes, TMDS461PZT provides independent HPD status for all four input ports via HPD1–HPD4 outputs. For the selected port, HPD[x] follows HPD_SINK; for unselected ports, HPD[x] follows the corresponding 5V_PWR[x] signal through internal 1-kΩ pull-ups. This architecture enables true plug-and-play detection across multiple sources without external logic, and remains functional even when TMDS461PZT is unpowered - a key requirement for HDMI-compliant sink devices.
TMDS461PZT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 100-TQFP
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- Applications:
- Digital Video, Video Editing
- Interface:
- I2C
- Voltage - Supply:
- 3V ~ 3.6V
- Supplier Device Package:
- 100-TQFP (14x14)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
TMDS461PZT FAQ
1.How can I place an order for TMDS461PZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TMDS461PZT 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 TMDS461PZT reliable?
The price and inventory of TMDS461PZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMDS461PZT is usually 5 days.
3.What payment methods are accepted for TMDS461PZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMDS461PZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMDS461PZT?
TMDS461PZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMDS461PZT 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 TMDS461PZT?
For technical support, including TMDS461PZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMDS461PZT requirements.
6.How does Aetrix verify that TMDS461PZT is sourced from the original manufacturer or authorized distributors?
All TMDS461PZT 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 TMDS461PZT meets industry standards.
7.What is the process for return or replacement of TMDS461PZT?
All TMDS461PZT units undergo pre-shipment inspection (PSI). If there is an issue with TMDS461PZT, 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 TMDS461PZT part is unused and in its original packaging.
Return procedure for TMDS461PZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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