TMDS Data 1+ Pin Number in DVI Connectors

This article provides the exact pin assignment for TMDS Data 1+ on a standard DVI (Digital Visual Interface) connector, along with a concise explanation of its function and position within the overall DVI pinout architecture.

In any standard DVI connector—including DVI-D (digital only) and DVI-I (integrated digital and analog)—the exact pin number for TMDS Data 1+ is Pin 10.

TMDS Data 1 Signal Overview

DVI uses Transition Minimized Differential Signaling (TMDS) to transmit high-speed digital video data. TMDS utilizes complementary pairs of signals (a positive line and a negative line) to minimize electromagnetic interference and allow accurate signal recovery over copper cables.

• Pin 9: TMDS Data 1- (Negative differential data line)
• Pin 10: TMDS Data 1+ (Positive differential data line)
• Pin 11: TMDS Data 1/3 Shield (Ground shield for the Data 1 and Data 3 pairs)

Role in Video Transmission

In a standard single-link DVI configuration, the digital video stream is divided across three TMDS data channels:

• Channel 0 (Pins 17/18): Carries the Blue color component and synchronization signals (HSync and VSync).
• Channel 1 (Pins 9/10): Carries the Green color component.
• Channel 2 (Pins 1/2): Carries the Red color component.

Because Pin 10 carries the positive side of TMDS Channel 1, any damage, bent pin, or connection failure on Pin 10 will typically result in a complete loss of the green color channel, digital artifacting, or an inability for the display to establish a stable digital handshake.