Mini-DIN Pinout
Family of small circular DIN connectors; the 6-pin variant is the PS/2 keyboard/mouse port.
Overview
Mini-DIN is a family of miniature circular connectors (3 to 9 pins). The most common members are 4-pin (S-Video), 6-pin (IBM PS/2 keyboard and mouse), and 8-pin (some Mac serial/AV).
The canonical 6-pin PS/2 pinout is shown - a clock/data pair plus +5 V and ground, with two reserved positions. The keyboard and mouse used identical pinouts (distinguished by color).
Pinout
| Pin | Name | Function | Description |
|---|---|---|---|
| 1 | DATA | DATA | Bidirectional data line |
| 2 | Reserved / NC | DATA | Not connected (mouse data on combined ports) |
| 3 | GND | GND | Ground |
| 4 | VCC (+5V) | POWER | +5 V power (typically fused, ~275 mA) |
| 5 | CLK | CLK | Clock line |
| 6 | Reserved / NC | CLK | Not connected (mouse clock on combined ports) |
Notes
- Pinout shown is the 6-pin PS/2 variant, the most widely used Mini-DIN.
- 4-pin Mini-DIN = S-Video; 8-pin variants vary by application.
Reference: Mini-DIN connector - 6-pin PS/2 pinout· verified 2026-06-27