Texas Instruments SN75DP126SSRHUR

Overview

SN75DP126SSRHUR from Texas Instruments is a DisplayPort™ 1:2 re-driver switch with integrated TMDS translator, supporting one DP++ input routed to either a DP++ sink or an HDMI 1.4b/DVI-compatible TMDS sink. It delivers HBR2 signaling up to 5.4 Gbps on DP lanes and TMDS data rates up to 3.4 Gbps, features programmable input equalization (up to 18 dB), tunable DP output voltage swing (238–1300 mVpp) and pre-emphasis (0–9.5 dB), and operates across 0°C to 85°C in notebook and docking station video routing applications.

For engineers reviewing the SN75DP126SSRHUR datasheet, SN75DP126SSRHUR pinout, SN75DP126SSRHUR application, or SN75DP126SSRHUR equivalent, this page provides verified electrical specifications, I²C-configurable signal conditioning parameters, thermal performance data (RθJA = 35°C/W), fail-safe HPD/CAD interface behavior, and confirmed dual-supply (SN75DP126DS) / single-supply (SN75DP126SS) variant compatibility for system-level timing and power integrity validation.

Technical Context

The SN75DP126SSRHUR implements a dual-path re-driving architecture with independent equalization per DP input lane (configurable up to 18 dB for HBR2) and separate output conditioning for DP and TMDS paths. Its auto-configuration via DisplayPort link training dynamically adjusts input EQ and output VOD/pre-emphasis based on AUX channel feedback, enabling adaptive compensation for PCB trace loss and connector insertion loss.

It integrates dedicated DDC and AUX source/sink interfaces with built-in pull-up/pull-down resistors (60 kΩ SCL/SDA_SRC; 130 kΩ HPD inputs), supports priority-based sink selection via PRIORITY pin, and includes failsafe logic for HPD_SRC assertion during sink transitions. The device enters low-power Output Disable mode when no valid DP++ input signal is detected.

Key Specifications

Pinout & Package

SN75DP126SSRHUR is housed in a 56-pin WQFN package (11.00 mm × 5.00 mm) with exposed thermal pad. The package supports standard reflow profiles and requires decoupling capacitors on VCC (3.3 V) and VDD_DREG (1.05 V digital core supply).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DisplayPort re-driver and TMDS translator applications.

Compared with SN75DP130RHUR and PS8315-SP, SN75DP126SSRHUR uniquely supports bidirectional DP++ sink output *and* HDMI/DVI sink output from a single input, enabling flexible multi-protocol routing in space-constrained designs without sacrificing legacy DVI compatibility or ultra-low standby power.

Availability

SN75DP126SSRHUR is available at Aetrix Electronics and suitable for notebook PC video routing, desktop docking stations, and standalone PC video cards requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.

Supply support for SN75DP126SSRHUR 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 expertise in high-speed interface ICs and signal integrity engineering.

The SN75DP126SSRHUR belongs to TI's DisplayPort re-driver and protocol translator product line, designed specifically for mobile and desktop graphics subsystems needing seamless DP++ to HDMI/DVI interoperability with minimal layout overhead and zero firmware dependency.

FAQ

What is the maximum supported data rate for DP and HDMI modes on SN75DP126SSRHUR?

SN75DP126SSRHUR supports DisplayPort HBR2 signaling at 5.4 Gbps per lane (total 21.6 Gbps for 4 lanes) and HDMI 1.4b TMDS signaling up to 3.4 Gbps per data lane. These rates enable QHD@144Hz over DP and 1080p deep color over HDMI, validated per PHY_CTS test patterns and specified in the official TI datasheet revision SLLSEA9B.

Does SN75DP126SSRHUR require external configuration or can it operate autonomously?

SN75DP126SSRHUR operates autonomously using DisplayPort link training to auto-configure input equalization and output signal parameters. However, optional I²C configuration (via SCL_CTL/EQ and SDA_CTL/PRE pins) allows fine-tuning of VOD, pre-emphasis, and EQ settings. The SN75DP126SSRHUR also supports pin-strapping (e.g., PRIORITY, HDMI_EN#) for static mode selection without software.

How does SN75DP126SSRHUR handle hot-plug detection when both DP and HDMI sinks are connected?

SN75DP126SSRHUR uses the PRIORITY pin to resolve dual-sink contention: when low, DP sink takes precedence; when high, HDMI/DVI sink is selected. HPD_SRC asserts high for a fixed duration during sink transitions, ensuring reliable GPU detection. Both DP_HPD_SNK and TMDS_HPD_SNK inputs are 5-V tolerant with integrated 130 kΩ pull-downs for robust hot-plug signaling.

What power supply configurations does SN75DP126SSRHUR support?

SN75DP126SSRHUR (SS suffix) uses a single 3.3-V supply on VCC pins and a 1.05-V digital core supply on VDD_DREG. The dual-supply variant SN75DP126DS separates VDD (1.05 V) and VCC (3.3 V). All variants specify strict operating ranges: VCC = 3.0–3.6 V, VDD = 1.0–1.2 V, with shutdown current as low as 0.55 mA and standby current ~2 mW.

Is SN75DP126SSRHUR compatible with AMD, Intel, and NVIDIA GPUs out of the box?

Yes - SN75DP126SSRHUR is explicitly designed for glue-less interfacing with AMD, Intel, and NVIDIA graphics processors. It supports separate DDC and AUX channels, handles combined DDC/AUX sources, and includes integrated pull-up/pull-down resistors matching GPU reference schematics. TI confirms compatibility in the SLLSEA9B datasheet Section 1 and Application Report SZZA037.