OKI Semiconductor
ML9228
82-Bit Duplex/Triplex VFD Controller/Driver with Digital Dimming, Keyscan
FEDL9228-01
Issue Date: Oct. 20, 2004
GENERAL DESCRIPTION
The ML9228 is a full CMOS controller/driver for Duplex or Triplex vacuum fluorescent display tube. It conststs
of 82-segment driver outputs and 3-grid pre-driver outputs, so that it can drive directly up to 246-segment VFD.
ML9228 features a digital dimming function, a 5
×
6 keyscan circuit.
FEATURES
•
Driver Supply voltage (V
DISP
)
•
Logic Supply voltage (V
DD
)
•
Duplex/Triplex selectable
•
Applicable VFD tube
: 8.0V to 18.5V
: 3.3V±10%, 5.0V±10%
: 2 Grids
×
82 Anodes VFD tube
: 3 Grids
×
82 Anodes VFD tube
•
82-segment driver outputs
: I
OH
= –6 mA at V
OH
= V
DISP
–0.8 V (SEG1 to 82)
•
3-grid pre-driver outputs
: I
OL
= 10 mA at V
OL
= 2 V
•
Built-in digital dimming circuit (10-bit resolution)
•
Built-in 5
×
6 keyscan circuit
•
Built-in oscillation circuit (external R and C)
•
Built-in Power-On-Reset circuit
•
Package:
128-pin plastic QFP (QFP128-P-1420-0.50-K) (ML9228 GA)
1/25
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