The ML9227 is a full CMOS controller/driver for Duplex or Triplex vacuum fluorescent display tube. It conststs of 27-segment driver outputs and 3-grid pre-driver outputs, so that it can drive directly up to 81-segment VFD. ML9227 features a digital dimming function, a 6-ch ADC, a 5 × 5 key scan circuit and an encoder type switch interface. ML9227 provides an interface with a microcontroller only by three signal lines: DATA I/O, CLOCK, CS
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