NORITAKE ITRON VFD MODULES 256 x 128 Dot Graphic Dot Graphic VFD Module GU256x128C-3900 is a high brightness blue green display module with 5V supply, high speed 8 bit parallel interface and asynchronous serial interface.
The GU256x128C-3900 is a dot‑graphic vacuum fluorescent display module that includes the VFD glass, 5 V supply drivers, a micro‑controller with refresh RAM, and a high‑brightness blue‑green display generator. It offers a high‑speed 8‑bit parallel interface and an asynchronous RS‑232 serial interface supporting baud rates up to 38 400.
Electrical specifications include a 5.0 VDC supply voltage, 850 mA typical current draw, operating temperature from –40 °C to +85 °C, and a luminance of 500 cd/m². The module provides a range of RS‑232 command codes for display control and a parallel interface for host CPU connection.
| Display Area | 83.08 x 41.48 mm |
|---|---|
| Power Supply Voltage | 5.0 VDC |
| Power Supply Current | 850 mA (typ) |
| Operating Temperature | -40 °C to +85 °C |
| Luminance | 500 cd/m² (typ) |
| Colour of Illumination | Blue‑Green |
| RS‑232 High Input (VIH) | 3.0 VDC min |
| RS‑232 Low Input (VIL) | -3.0 VDC max |
| RS‑232 High Output (VOH) | 5.0 VDC min |
| RS‑232 Low Output (VOL) | -5.0 VDC max |
| Supported Baud Rates | up to 38 400, no parity |
The module operates from –40 °C to +85 °C.
It requires a 5.0 VDC supply voltage.
The serial interface supports baud rates up to 38 400 with no parity.
The display provides a 256 × 128 dot graphic resolution.