Texas Instruments SN75DP139RGZT

Overview

SN75DP139RGZT from Texas Instruments is a DisplayPort-to-TMDS level-shifting re-driver IC designed for DP++ (Dual-Mode DisplayPort) interface translation in video signal chains. It converts DisplayPort 1.1a/1.2 main link differential signals to HDMI/DVI-compliant TMDS outputs, supports up to 3.4 Gbps data rate and 340 MHz TMDS clock, enables 4k×2k@30Hz/24bpp and deep color (36bpp), and operates across 0°C to 85°C in a 48-pin 7 mm × 7 mm VQFN package.

For engineers reviewing the SN75DP139RGZT datasheet, SN75DP139RGZT pinout, SN75DP139RGZT application, or SN75DP139RGZT equivalent, this page delivers verified electrical specs, validated pin functions for the RGZ package, confirmed HDMI 1.4b and DVI 1.0 compliance, real-world timing jitter values (≤50 ps residual data jitter), and precise thermal metrics (θJB = 10.9°C/W) - all critical for high-speed video interface design, dongle layout, and GPU-to-monitor signal integrity validation.

Technical Context

The SN75DP139RGZT implements a dual-path architecture: a DisplayPort physical layer receiver with adaptive equalization for degraded DP input signals, and a TMDS-level-shifting re-driver with programmable slew rate (via I2C_EN and SRC pins) and voltage swing control (via Vsadj resistor). It integrates bidirectional DDC/I²C buffering with offset selection (OVS) and HPD logic inversion (HPDINV) to support both HDMI and DVI connector detection and handshaking.

Its functional modes are controlled by OE_N (output enable/power-save), DDC_EN (DDC buffer on/off), and I2C_EN (HDMI/DVI mode selection), enabling dynamic power management and protocol-aware signal conditioning. The device maintains strict TMDS output compliance through calibrated termination (50 Ω ±10%), controlled VOD(PP) (800–1200 mV), and low inter-pair skew (≤100 ps), meeting HDMI 1.4b timing and eye diagram requirements.

Key Specifications

Pinout & Package

SN75DP139RGZT uses a 48-pin VQFN (RGZ) package with exposed thermal pad connected to GND. Pin count, layout, and signal mapping are specific to the RGZ variant and differ from the 40-pin WQFN (RSB) version.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN75DP139RGZT, SN75DP159RGZT delivers higher bandwidth and HDCP for next-gen displays but requires layout changes, while PTN3360BS/V1,118 offers functional equivalence at lower cost but sacrifices HPD/DDC tuning capability essential for robust multi-sink interoperability.

Availability

SN75DP139RGZT is available at Aetrix Electronics and suitable for DP++ dongles, GPU add-in cards, and notebook docking stations requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing for industrial and commercial video interface designs.

Supply support for SN75DP139RGZT 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 video signal conditioning.

The SN75DP139RGZT belongs to TI's DisplayPort re-driver product line, engineered specifically for DP++ translation in space-constrained, thermally demanding video interface applications such as portable docks and GPU cards.

FAQ

What is the maximum supported resolution and refresh rate for SN75DP139RGZT?

The SN75DP139RGZT supports up to 4k × 2k resolution at 30 Hz with 24-bit color depth, and 1080p at up to 120 Hz. Its 3.4 Gbps data rate and 340 MHz TMDS clock capability align with HDMI 1.4b specifications, enabling deep color (36bpp) and 3D video formats. These limits are defined by the device's electrical characteristics and are validated in TI's SLLS977F datasheet under recommended operating conditions.

Does SN75DP139RGZT support HDCP encryption?

No, SN75DP139RGZT does not implement HDCP encryption or key management. It is a physical-layer re-driver only - it translates DisplayPort signals to TMDS format and handles HPD/DDC handshaking, but passes encrypted content transparently. For HDCP-compliant systems, an external HDCP repeater or source/sink with built-in HDCP must be used alongside SN75DP139RGZT.

How does the Vsadj resistor affect SN75DP139RGZT performance?

The Vsadj resistor (recommended 4.02 kΩ ±5%) sets the TMDS output voltage swing precision. It directly controls VOD(PP) to maintain 800–1200 mV compliance; deviation causes non-compliant eye diagrams. System-level losses, AVCC variation, and RT tolerance impact optimal value - TI Figure 19 provides reference curves. Incorrect Vsadj selection risks HDMI sink detection failure or signal integrity degradation.

Can SN75DP139RGZT operate in both HDMI and DVI modes simultaneously?

No - SN75DP139RGZT operates in either HDMI or DVI mode, selected by the I2C_EN pin state (high = HDMI, low = DVI). This configures internal registers, slew rate profiles, and DDC behavior. Simultaneous operation is not supported; mode switching requires pin reconfiguration and may interrupt active video. Dual-sink use requires separate SN75DP139RGZT instances or external multiplexing.

What thermal management guidance applies to SN75DP139RGZT in a 7 mm × 7 mm VQFN package?

SN75DP139RGZT has a junction-to-board thermal resistance (θJB) of 10.9°C/W for the RGZ package. To maintain operation within 0°C–85°C ambient, the PCB must include a solid thermal pad connected to ≥4 thermal vias to internal ground planes. Power dissipation ranges from 396 mW (HDMI active) to <3 mW (shutdown), so thermal design must prioritize worst-case mode. TI recommends following layout guidelines in Section 10 of SLLS977F.