LED HUB Pinout Diagrams: HUB75, HUB75E, HUB12, HUB08 Reference
HUB connectors are the ribbon-cable interfaces between an LED receiving card (or hub board) and the LED modules themselves. The pinout determines how RGB data, address lines, and control signals reach the module. This page is a quick reference for the three most common standards.
HUB75 / HUB75E (RGB Video Modules)
HUB75 is the de-facto standard for full-color LED modules (P1.2 through P10 and beyond). The connector is a 2×8 IDC header (16 pins). HUB75E adds a fifth address line (E) on pin 8 for 1/32-scan modules; on standard 1/16-scan HUB75 that pin is ground.
| Pin | Signal | Pin | Signal |
|---|---|---|---|
| 1 | R1 (top half red) | 2 | G1 (top half green) |
| 3 | B1 (top half blue) | 4 | GND |
| 5 | R2 (bottom half red) | 6 | G2 (bottom half green) |
| 7 | B2 (bottom half blue) | 8 | E (HUB75E) / GND (HUB75) |
| 9 | A (row address) | 10 | B (row address) |
| 11 | C (row address) | 12 | D (row address) |
| 13 | CLK (shift clock) | 14 | LAT / STB (latch) |
| 15 | OE (output enable, active low) | 16 | GND |
Scan rate determines which address lines are used: 1/8-scan uses A–C, 1/16-scan uses A–D, 1/32-scan uses A–E. Two data groups (R1G1B1 / R2G2B2) drive the top and bottom halves of the module simultaneously.
HUB12 (Single-Color P10 Modules)
HUB12 drives the ubiquitous single-color P10 panels used in monochrome message signs. Same 2×8 IDC connector, far fewer signals — one data line, two or three address lines.
| Pin | Signal | Pin | Signal |
|---|---|---|---|
| 1 | OE (output enable) | 2 | A (address) |
| 3 | B (address) | 4 | GND |
| 5 | R (serial data) | 6 | GND |
| 7 | CLK (shift clock) | 8 | GND |
| 9 | LAT / SCLK (latch) | 10 | GND |
| 11–16 | GND / not connected (some boards repeat data on 11) | ||
Note: HUB12 is less rigidly standardized than HUB75 — a few manufacturers shuffle the control pins. Always verify against the silkscreen on your hub board or module before wiring an adapter.
HUB08 (Dual-Color Modules)
HUB08 appears on older dual-color (red/green) modules. It uses a 2×10 (20-pin) connector carrying two data lines per color (upper/lower), four address lines (A–D), and the same CLK/LAT/OE control trio. If you are servicing dual-color signage, photograph the existing ribbon orientation before disconnecting anything — reversed HUB08 ribbons are the most common self-inflicted fault we see.
Matching HUB Type to a Receiving Card
NovaStar receiving cards expose HUB75 directly or through interchangeable hub boards (HUB75B, HUB12B, etc.). When replacing a card in an existing sign, match three things: HUB type, number of HUB ports (a 12-port card cannot be swapped for an 8-port without re-cabling), and loading capacity for the module's scan rate. Our receiving card comparison guide covers capacity per card, and our driver IC reference lists which cards support which module driver chips. Not sure what you have? Call 321-747-3220 with a photo of the existing card and we will identify it.