15 pin highdensity D-SUB female connector.
The Grandtec Ultimate Grand 2000 is a pocketsize universal VGA-to-TV scan converter that accepts a standard PC VGA signal and outputs it as composite video and S-Video in both NTSC and PAL formats, supporting resolutions up to 1024×768. Unlike standard VGA devices, it uses a single HD-15 (DE-15) Y-cable connector that simultaneously serves as both the PC input and VGA monitor output — a proprietary remapping that repurposes several pins from their standard VGA function. RGB analogue video signals are 0.7 Vpp ±0.1 Vpp at 75 Ω, and synchronisation signals are TTL level. The device carries DDC2B (Display Data Channel, I²C bidirectional) on pin 4 (SDA, from the PC) and pin 15 (SCL), enabling plug-and-play display identification.
| Pin | Name | Description |
|---|---|---|
| 1 | R out | Monitor |
| 2 | G out | Monitor |
| 3 | B out | Monitor |
| 4 | DDC2: SDA | Monitor and PC |
| 5 | G in | PC |
| 6 | GND | Tied to all the grounds and ID0 on PC side (5,6,7,8,10,11) some grounds on monitor (5,6,8,10) |
| 7 | G GND | Tied to green ground on monitor (presumably for Sync-On-Green) |
| 8 | GND | Tied to all the grounds and ID0 on PC side (5,6,7,8,10,11) some grounds on monitor (5,6,8,10) |
| 9 | R in | PC |
| 10 | B in | PC |
| 11 | H/C sync in | PC |
| 12 | V sync in | PC |
| 13 | H/C sync out | Monitor |
| 14 | V sync out | Monitor |
| 15 | DDC2: SCL | Monitor and PC |
Notes
The HD-15 Y-cable connector is a proprietary Grandtec implementation and does not follow the standard VGA or VESA DDC pin assignments. In particular, pin 4 is reassigned from the standard Monitor ID 2 / Reserved function to carry DDC2B SDA data from the PC — a deliberate design choice specific to this device. Pins 5, 9, and 10 carry individual green, red, and blue analogue inputs from the PC rather than their standard VGA roles. Buffered HSYNC and VSYNC outputs to the monitor appear on pins 13 and 14 as in standard VGA. The device is powered externally at 5 V, 500 mA.
Signals
- R out — Red analogue video output to VGA monitor; 0.7 Vpp ±0.1 Vpp, 75 Ω
- G out — Green analogue video output to VGA monitor; 0.7 Vpp ±0.1 Vpp, 75 Ω
- B out — Blue analogue video output to VGA monitor; 0.7 Vpp ±0.1 Vpp, 75 Ω
- DDC2: SDA — DDC2B I²C serial data line; carries EDID data from PC (non-standard pin assignment for this Y-cable)
- G in — Green analogue video input from PC; 0.7 Vpp ±0.1 Vpp, 75 Ω
- GND — Signal ground; on the PC side tied to grounds and Monitor ID 0 (pins 5, 6, 7, 8, 10, 11); on the monitor side tied to selected grounds
- G GND — Green video ground to monitor; may support Sync-On-Green configurations
- R in — Red analogue video input from PC; 0.7 Vpp ±0.1 Vpp, 75 Ω
- B in — Blue analogue video input from PC; 0.7 Vpp ±0.1 Vpp, 75 Ω
- H/C sync in — Horizontal (or composite) sync input from PC; TTL level
- V sync in — Vertical sync input from PC; TTL level
- H/C sync out — Horizontal (or composite) sync output to VGA monitor; buffered TTL level
- V sync out — Vertical sync output to VGA monitor; buffered TTL level
- DDC2: SCL — DDC2B I²C serial clock line; shared between PC and monitor