VGA DE-15 Pinout
The 15-pin three-row D-sub carrying analog RGBHV video plus a DDC channel.
Overview
The VGA connector is a 15-pin D-subminiature in a DE-size shell with three rows of five pins (often called HD-15). It carries analog component video as separate red, green, and blue lines (0-0.7V into 75 ohm) each with its own return, plus separate horizontal and vertical sync.
Pins 12 and 15 add a VESA DDC (I2C) channel so the host can read the monitor's EDID, with pin 9 supplying +5V to that EDID circuit. Pins 4 and 11 are typically unused or used for monitor ID.
Pinout
| Pin | Name | Function | Description |
|---|---|---|---|
| 1 | Red Video | VIDEO | Analog red, 0-0.7V into 75 ohm |
| 2 | Green Video | VIDEO | Analog green, 0-0.7V into 75 ohm |
| 3 | Blue Video | VIDEO | Analog blue, 0-0.7V into 75 ohm |
| 4 | ID2 / Reserved | SIGNAL | Monitor ID bit 2 (often unused) |
| 5 | Ground | GND / VIDEO | Ground (composite sync / self-test) |
| 6 | Red Return | GND / VIDEO | Red video ground return |
| 7 | Green Return | GND / VIDEO | Green video ground return |
| 8 | Blue Return | GND / VIDEO | Blue video ground return |
| 9 | +5V (DDC power) | POWER / I2C | +5V supply for EDID/DDC (key pin in some shells) |
| 10 | Sync Ground | GND / I2C / VIDEO | Ground return for HSync/VSync and DDC |
| 11 | ID0 / Reserved | SIGNAL | Monitor ID bit 0 (often unused) |
| 12 | SDA (DDC Data) | I2C / DATA | DDC/I2C data line |
| 13 | Horizontal Sync | VIDEO | Horizontal sync (HSync) |
| 14 | Vertical Sync | VIDEO | Vertical sync (VSync) |
| 15 | SCL (DDC Clock) | I2C / CLK | DDC/I2C clock line |
Notes
- Pin 9 is sometimes physically keyed (no hole) on older connectors.
- Pins 4 and 11 originally carried monitor ID bits, now usually unused.
Reference: VESA DDC / Wikipedia — VGA connector· verified 2026-06-27