Texas Instruments TMDS442PNPR

Overview

TMDS442PNPR from Texas Instruments is a 4-to-2 single-link or 2-to-1 dual-link DVI/HDMI physical layer switch IC for digital video routing. It supports 2.25 Gbps signaling, integrates 50-Ω TMDS receiver terminations and 8-dB input equalization, and operates from a 3.3-V supply in a 128-pin TQFP PowerPAD package. It enables picture-in-picture display by switching up to four HDMI/DVI sources to two independent sink ports.

For engineers reviewing the TMDS442PNPR datasheet, TMDS442PNPR pinout, TMDS442PNPR application, or TMDS442PNPR equivalent, this page delivers verified electrical specs, I²C repeater functionality, TMDS channel skew performance (≤150 ps inter-pair), hot-plug detection handling, and de-emphasis control-critical for HDMI 1.3a-compliant AV receiver, STB, and digital projector designs.

Technical Context

The TMDS442PNPR implements a dual 4-to-1 multiplexer architecture with independent control of two sink ports via SA/SB selector pins and OE/I2CEN/PRE GPIOs. Each sink port features integrated 50-Ω termination pulled to V_CC, 8-dB receiver equalization for ≥5 m HDMI cables, and selectable AC de-emphasis (3 dB) on TMDS outputs.

Its I²C repeater isolates bus capacitance between source and sink sides, supporting standard-mode (100 kHz) and fast-mode (400 kHz) operation. HPD logic synchronizes sink-side hot-plug status with the selected source, while 5V_PWR sensing enables automatic I²C driver activation per active port.

Key Specifications

Pinout & Package

TMDS442PNPR is housed in a 128-pin PowerPAD TQFP (PNP) package with exposed thermal pad for enhanced heat dissipation. The package supports standard 260°C reflow soldering and complies with RoHS.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar HDMI/DVI switching applications.

Compared with TMDS443PNPR and NB7L573MNR2G, TMDS442PNPR uniquely delivers dual independent sink control, integrated HDMI 1.3a-compliant PHY functions, and full DDC/HPD management-reducing design complexity and component count in multi-source AV systems.

Availability

TMDS442PNPR is available at Aetrix Electronics and suitable for digital TV, AV receiver, and digital projector designs requiring stable component supply, long-lifecycle availability, and HDMI 1.3a interoperability.

Supply support for TMDS442PNPR 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 TMDS442PNPR belongs to TI's high-speed interface product line, engineered specifically for HDMI/DVI signal routing in consumer AV equipment where signal integrity, protocol compliance, and multi-port flexibility are critical.

FAQ

What is the maximum supported resolution and color depth for TMDS442PNPR?

The TMDS442PNPR supports resolutions up to 1080i/p with signaling rates up to 2.25 Gbps and color depths up to 12 bits per channel. This enables full HDMI 1.3a compliance for high-definition video transport including deep color modes. The device maintains timing integrity across all four TMDS lanes with ≤150 ps inter-pair skew, ensuring accurate pixel reconstruction at the display. TMDS442PNPR achieves this without external redrivers thanks to its integrated 8-dB receiver equalization.

Does TMDS442PNPR require external termination resistors on TMDS inputs?

No, TMDS442PNPR does not require external termination resistors on TMDS inputs. It integrates 50-Ω termination resistors pulled to V_CC on all eight TMDS input pairs (A/B1–A/B4), eliminating the need for discrete 100-Ω differential terminations. This reduces PCB layout complexity and component count. The internal termination is optimized for standard HDMI/DVI impedance profiles and remains effective across the full 0–2.25 Gbps data rate range. TMDS442PNPR's termination design is validated per HDMI 1.3a electrical specifications.

How does the I²C repeater function in TMDS442PNPR improve system reliability?

The I²C repeater in TMDS442PNPR electrically isolates the source-side and sink-side DDC buses, preventing cumulative bus capacitance from exceeding the 400 pF limit defined in the I²C specification. This allows up to four HDMI sources to share a single controller I²C bus without signal degradation or timing violations. The repeater supports both standard (100 kHz) and fast-mode (400 kHz) operation and maintains bidirectional data flow for EDID reads and HDCP handshakes. TMDS442PNPR's I²C repeater ensures robust DDC communication even when multiple unselected ports remain connected.

Can TMDS442PNPR be configured using only GPIO pins, or is I²C required?

TMDS442PNPR supports dual configuration modes: GPIO-only and local I²C. The GE (GPIO Enable) pin selects the mode-when GE = high, all sink port controls (SA, SB, OE, I2CEN, PRE) operate as dedicated GPIOs; when GE = low, configuration is performed via the local I²C interface (LC_SCL/LC_SDA). This flexibility allows simple microcontroller GPIO control in cost-sensitive designs or centralized I²C management in complex systems. TMDS442PNPR retains full functionality in either mode, including HPD synchronization and de-emphasis control.

What thermal management provisions does TMDS442PNPR include?

TMDS442PNPR uses a 128-pin PowerPAD TQFP package with an exposed thermal pad that must be soldered to a large copper pour on the PCB for effective heat dissipation. Its junction-to-board thermal resistance (R_θJB) is 7.86°C/W under JEDEC Low-K board conditions. At 3.3 V and 2.25 Gbps operation, typical power dissipation is 1344 mW; derating begins above 25°C at 43.08 mW/°C (High-K board). Thermal design must ensure ambient temperature stays within 0–70°C, and the PowerPAD must be properly grounded per TI layout guidelines. TMDS442PNPR's thermal performance is validated for continuous operation in enclosed consumer AV enclosures.