Texas Instruments TDP142IRNQT

Overview

TDP142IRNQT from Texas Instruments is a DisplayPort™ 1.4 linear redriver IC supporting up to 8.1 Gbps per lane (HBR3) across four differential lanes, featuring up to 14 dB of receiver equalization, transparent link training compliance, and AUX/HPD signal snooping capability - deployed in notebooks, docking stations, and active DisplayPort cables to extend channel reach and restore signal integrity.

For engineers reviewing the TDP142IRNQT datasheet, TDP142IRNQT pinout, TDP142IRNQT application, or TDP142IRNQT equivalent, this device requires attention to its GPIO- or I2C-configurable equalization settings, 3.3 V single-supply operation, WQFN-40 package thermal constraints, and lane-aware AUX snooping behavior for power-state-aware lane management.

Technical Context

The TDP142IRNQT implements a position-independent linear redriver architecture compliant with VESA DisplayPort 1.4, supporting full HBR3 (8.1 Gbps) on all four lanes with selectable equalization gain (1.0–14.4 dB at 4.05 GHz) via DPEQ[1:0] pins or I2C registers. Its AUX snooping logic monitors DPCD writes to LANE_COUNT_SET (0x00101) and SET_POWER_STATE (0x00600) to dynamically enable/disable lanes.

It operates on a single 3.3 V supply with ultra-low-power design, supports both GPIO and I2C configuration modes (selected by I2C_EN), and delivers differential output swing up to 1500 mV_PP with <0.135 UI_pp total jitter at 8.1 Gbps - enabling robust electrical idle detection, hot-plug capability, and industrial-grade reliability (0°C to 70°C).

Key Specifications

Pinout & Package

Package: 40-pin WQFN (RNQT), 4.0 mm × 6.0 mm body, 0.4 mm pitch, thermally enhanced with exposed ground pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TDP142IRNQT, TDP158RNQT adds DSC/HDCP but increases complexity and cost, while AP1584BQDD-13 sacrifices EQ headroom, AUX intelligence, and HBR3 support - making TDP142IRNQT the optimal balance of performance, configurability, and footprint for mainstream DP 1.4 redriving.

Availability

TDP142IRNQT is available at Aetrix Electronics and suitable for notebooks, docking stations, and active DisplayPort cables requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for volume production.

Supply support for TDP142IRNQT 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 company specializing in analog, embedded processing, and connectivity technologies, with leadership in high-speed interface solutions for computing and consumer electronics.

The TDP142IRNQT belongs to TI's DisplayPort redriver product line, engineered specifically to solve signal integrity challenges in compact, thermally constrained DP 1.4 systems - emphasizing transparency, low power, and intelligent lane management.

FAQ

What is the maximum data rate supported by the TDP142IRNQT?

The TDP142IRNQT supports up to 8.1 Gbps per lane (HBR3), fully compliant with VESA DisplayPort 1.4 specifications. This enables transmission of uncompressed 4K@60Hz video with HDR and audio over four lanes. The device maintains signal integrity at this rate using up to 14 dB of linear equalization and delivers differential output swing up to 1500 mV_PP. All timing parameters - including jitter (<0.135 UI_pp) and rise/fall times (<40 ps) - are validated at 8.1 Gbps in the official TI datasheet SLLSEZ1C.

How does the TDP142IRNQT handle DisplayPort lane management?

The TDP142IRNQT performs autonomous lane management via native AUX snooping: it monitors DPCD register writes to LANE_COUNT_SET (0x00101) and SET_POWER_STATE (0x00600) to enable/disable lanes in real time. When SET_POWER_STATE = D3, all lanes shut down; otherwise, active lane count matches LANE_COUNT_SET. This behavior is enabled by default and can be disabled via the AUX_SNOOP_DISABLE register or the SNOOPENZ pin in GPIO mode - ensuring power efficiency without host firmware involvement.

Can the TDP142IRNQT be configured without I2C?

Yes, the TDP142IRNQT supports full GPIO-mode configuration when I2C_EN = '0'. In this mode, DPEQ[1:0] pins set equalization gain (16 levels), DPEN controls DP enable/disable, and SNOOPENZ toggles AUX snooping. No external controller or firmware is required - all functions operate from simple resistor-divider voltage levels on 4-level inputs (0/R/F/1). This makes TDP142IRNQT ideal for cost-sensitive or firmware-constrained designs where I2C infrastructure is unavailable.

What package type and thermal characteristics does the TDP142IRNQT have?

The TDP142IRNQT uses a 40-pin WQFN package (RNQT) measuring 4.0 mm × 6.0 mm with 0.4 mm pitch and an exposed thermal pad. Its thermal resistance is R_θJA = 37.6°C/W and R_θJB = 9.5°C/W, enabling effective heat dissipation in space-constrained applications like ultrabooks and compact docks. The device draws 660 mW typical active power (4-lane @ 8.1 Gbps), and its commercial temperature range (0°C to 70°C) is validated for continuous operation under these thermal conditions.

Does the TDP142IRNQT support DisplayPort dual-mode (DP++) for HDMI conversion?

Yes, the TDP142IRNQT supports DisplayPort dual-mode (DP++) per VESA standard version 1.1, enabling AC-coupled HDMI signal transport over the same physical DP connector. This capability allows systems to drive HDMI displays using a single DP port with appropriate level-shifting circuitry. The redriver preserves TMDS timing integrity and supports the required AC coupling capacitor range (75–265 nF) specified in the TDP142IRNQT datasheet Section 6.7 for transmitter output compliance.