HDMI (Type-A) Connector Pinout
The 19-pin HDMI Type-A connector — TMDS video pairs, clock, DDC, CEC, and HPD.
Overview
HDMI Type-A is the standard 19-pin video/audio connector. Picture and sound travel over four shielded TMDS differential pairs (three data lanes + one clock). The remaining pins handle housekeeping: DDC (an I2C bus) for EDID, CEC for device control, +5V, and Hot Plug Detect.
The numbering interleaves signal and shield pins — each TMDS pair has its own shield pin between channels.
Pinout
| Pin | Name | Function | Description |
|---|---|---|---|
| 1 | TMDS Data2+ | VIDEO / PAIR | TMDS channel 2 +. |
| 2 | TMDS Data2 Shield | GND | Channel 2 shield. |
| 3 | TMDS Data2− | VIDEO / PAIR | TMDS channel 2 −. |
| 4 | TMDS Data1+ | VIDEO / PAIR | TMDS channel 1 +. |
| 5 | TMDS Data1 Shield | GND | Channel 1 shield. |
| 6 | TMDS Data1− | VIDEO / PAIR | TMDS channel 1 −. |
| 7 | TMDS Data0+ | VIDEO / PAIR | TMDS channel 0 +. |
| 8 | TMDS Data0 Shield | GND | Channel 0 shield. |
| 9 | TMDS Data0− | VIDEO / PAIR | TMDS channel 0 −. |
| 10 | TMDS Clock+ | CLK / PAIR | TMDS clock +. |
| 11 | TMDS Clock Shield | GND | Clock shield. |
| 12 | TMDS Clock− | CLK / PAIR | TMDS clock −. |
| 13 | CEC | DATA | Consumer Electronics Control. |
| 14 | Reserved | Reserved (HEC/utility in some versions). | |
| 15 | SCL | I2C | DDC clock (EDID). |
| 16 | SDA | I2C | DDC data (EDID). |
| 17 | DDC/CEC GND | GND | Ground for DDC/CEC. |
| 18 | +5V | POWER | +5V power (≤50 mA). |
| 19 | HPD | DATA | Hot Plug Detect. |
Notes
- DDC (pins 15/16) is an I2C bus the source uses to read the display's EDID.
- Mini (Type-C) and Micro (Type-D) HDMI carry the same 19 signals in a smaller shell.
Reference: HDMI connector pinout· verified 2026-06-21