Texas Instruments TMDS1204RNQR

Overview

TMDS1204RNQR from Texas Instruments is a 12Gbps HDMI 2.1 hybrid redriver IC supporting FRL at 3/6/8/10/12Gbps across three or four lanes, with AC- or DC-coupled I/O, adaptive/fixed equalization up to 12dB at 6GHz, and integrated HPD level shifting for 1.8V/3.3V LVCMOS. It operates in linear or limited redriver mode and targets HDMI sink-side signal integrity restoration in high-resolution video interfaces.

For engineers reviewing the TMDS1204RNQR datasheet, TMDS1204RNQR pinout, TMDS1204RNQR application, or TMDS1204RNQR equivalent, this device requires attention to FRL lane count configuration, CTLE map selection via pin strap or I2C, power-down current (0.6mW), VIO supply voltage range (1.14–3.6V), and thermal pad grounding per WQFN-40 layout guidelines.

Technical Context

The TMDS1204RNQR implements a dual-mode redriver architecture: linear mode preserves GPU-level signal fidelity for sink applications, while limited mode enforces HDMI-compliant output levels for source-side use. Its hybrid design supports both DP++-to-HDMI level shifting and native HDMI redriving without external components.

It integrates full lane swap capability on main data lanes, DDC snooping for link configuration, a fan-out buffer separating clock/data paths, and a signal-detect output triggered by IN_CLK or IN_D2 when HPD_IN is asserted. All high-speed I/Os support 90–110Ω differential input impedance with programmable termination.

Key Specifications

Pinout & Package

TMDS1204RNQR is housed in a 40-pin, 0.4mm-pitch, 4mm × 6mm WQFN package (RNQ) with an exposed thermal pad that must be connected to a solid ground plane for thermal management and signal integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar HDMI redriver applications.

Compared with TMDS1204RNQR, TMDS181RNQT lacks FRL and 12Gbps capability but offers lower cost and power for HDMI 2.0 systems, while PS176B adds retiming functionality at the expense of higher integration overhead and external clock dependency.

Availability

TMDS1204RNQR is available at Aetrix Electronics and suitable for high-resolution display docking, gaming console video interfaces, professional AV signage systems, and home theater AV receivers requiring stable component supply and HDMI 2.1 FRL compliance.

Supply support for TMDS1204RNQR 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 solutions with decades of HDMI interface IP expertise.

The TMDS1204RNQR belongs to TI's HDMI redriver product line, engineered specifically for high-fidelity signal restoration in HDMI 2.1 sink applications-including 8K video, dynamic HDR, and low-latency gaming-while minimizing system-level design complexity.

FAQ

What is the primary function of the TMDS1204RNQR in an HDMI 2.1 system?

The TMDS1204RNQR functions as a hybrid redriver that restores signal integrity for HDMI 2.1 Fixed Rate Link (FRL) up to 12Gbps across three or four lanes. It operates in either linear mode (for sink applications, preserving link training transparency) or limited mode (for source applications, enforcing HDMI-compliant output levels). The TMDS1204RNQR supports both AC- and DC-coupled interfaces and integrates HPD level shifting, DDC snooping, and lane-swapping capability to simplify system design.

Does the TMDS1204RNQR require an external clock source?

No, the TMDS1204RNQR does not require an external clock source. It recovers timing directly from the incoming HDMI data stream using its embedded clock-data recovery (CDR) circuitry. The RCLKOUTp/n pins provide a buffered copy of the recovered clock for auxiliary use in HDMI 1.4/2.0 configurations, but the TMDS1204RNQR itself operates autonomously without external timing references-even in 12Gbps FRL mode.

How is the TMDS1204RNQR configured for linear versus limited redriver mode?

The TMDS1204RNQR is configured for linear or limited redriver mode via the LINEAR_EN pin (Pin 5) in pin-strap mode: a logic high selects linear mode, and low selects limited mode. In I²C mode, the MODE register bit controls this behavior. Linear mode maintains proportional output swing relative to input amplitude-ideal for sink-side use-while limited mode clamps output to HDMI-specified voltage ranges, ensuring compliance in source-side deployments. The TMDS1204RNQR's datasheet Table 7-5 defines all pin-strap combinations.

Can the TMDS1204RNQR support HDMI 2.1 FRL with only three active lanes?

Yes, the TMDS1204RNQR fully supports HDMI 2.1 three-lane FRL operation at 3/6/8/10/12Gbps. Its architecture allows lane disablement via configuration registers or pin-strapping, and the device automatically adjusts equalization and termination accordingly. When operating in three-lane mode, the TMDS1204RNQR maintains full compliance with HDMI 2.1 FRL electrical specifications-including common-mode voltage (2.335–3.495V) and differential swing-across all supported data rates.

What thermal management is required for the TMDS1204RNQR in continuous 12Gbps operation?

The TMDS1204RNQR requires connection of its exposed thermal pad to a solid internal or bottom-side ground plane to achieve the specified RθJB of 11.7°C/W. In continuous 12Gbps FRL operation (575mW typical), junction temperature must remain below 105°C. With 10°C/W PCB thermal resistance, ambient temperature should not exceed 65°C. TI recommends ≥200mm² copper area under the RNQ package and thermal vias spaced ≤1mm apart for optimal heat dissipation in the TMDS1204RNQR design.