2X20 LCD Compatible VFD Module
20T202DA1E (Rev. 3.0)
1. SCOPE
* This specification applies to VFD module (Model No.: 20T202DA1E) manufactured by Samsung SDI or
SSVD(Shanghai Samsung Vacuum Devices).
2. FEATURES
* LCD Compatible: Drop-in-replacement (Same Interface and Mechanical Dimension as LCD Module).
* High Quality, Attractive and Readable Display: 5*7 Dot Matrix Type Vacuum Fluorescent Display.
* Compact and Lightweight: Flat Panel (VFD) and Surface Mount Technology.
* +5V single power supply.
* Brightness Level: Adjustable into 4 Levels (25%, 50%, 75% and 100%) by Software Command.
* Support CG-RAM Fonts and CG-ROM: 8 User-definable Characters (Volatile) and 240 Masked CG-ROM Fonts.
3. PRECAUTIONS
* Avoid applying excessive shock or vibration beyond the specification for the VFD module.
* Since VFDs are made of glass material, careful handling is required. i.e. Direct impact with hard material to the glass
surface (especially exhaust tip) may crack the glass.
* When mounting the VFD module to your system, leave a slight gap between the VFD glass and your front panel. The
module should be mounted without stress to avoid flexing of the PCB.
* Avoid plugging or unplugging the interface connection with the power on, otherwise it may cause the severe damage to
input circuitry.
* Slow starting power supply may cause non-operation because one chip MCU won't be reset.
* Exceeding any of maximum ratings may cause the permanent damage.
* Since the VFD modules contain high voltage source, careful handling is required during powered on.
* When the power is turned off, the capacitor does not discharge immediately. The high voltage applied to the VFD must
not contact to the ICs. And the short-circuit of mounted components on PCB within 30 seconds after power-off may
cause damage to those.
* The power supply must be capable of providing at least 5 times the rated current, because the surge current can be more
than 5 times the specified current consumption when the power is turned on.
* Avoid using the module where excessive noise interference is expected. Noise may affects the interface signal and
causes improper operation. And it is important to keep the length of the interface cable less than 50cm.
* Since all VFD modules contain C-MOS ICs, anti-static handling procedures are always required.
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