GENERAL DESCRIPTION
The ML9212 is a full CMOS controller/driver for Duplex or Triplex (1/2 duty or 1/3 duty) vacuum fluorescent display tube. It consists of a 32-segment driver multiplexed to drive up to 96 segments, and 10-bit digital dimming circuit.
ML9212 features a selection of a master mode and a slave mode, and therefore it can be used to expand segments for the VFD driver with keyscan and A/D converter function.
ML9212 provides an interface with a microcontroller only by three signal lines: DATA IN, CLOCK and CS.

FEATURES
• Logic supply voltage (VDD) : 4.5 to 5.5 V
• Driver supply voltage (VDISP) : 8 to 18 V
• Duplex/Triplex (1/2 duty / 1/3 duty) selectable
    DUP/TRI = 1/2 duty selectable at “H” level
    DUP/TRI = 1/3 duty selectable at “L” level
• Number of display segments
    Max. 64-segment display (during 1/2 duty mode)
    Max. 96-segment display (during 1/3 duty mode)
• Master/Slave selectable
    M/S = Master mode selectable at “H” level
    M/S = Slave mode selectable at “L” level
• Interface with a microcontroller
    Three lines: CS, CLOCK, and DATA IN
• 32-segment driver outputs : IOH = –5 mA at VOH = VDISP–0.8 V (SEG1 to 22)
    (can be directly connected to VFD tube : IOH = –10 mA at VOH = VDISP–0.8V (SEG23 to 32)
              and require no external resisters) : IOL = 500 μA at VOL = 2 V (SEG1 to 32)
• 3-grid pre-driver outputs : IOH = –5.0 mA at VOH = VDISP–0.8 V
    (require external drivers) IOL = 10 mA at VOL = 2 V
• Logic outputs : IOH = –200 μA at VOH = VDD–0.8 V
                           IOL = 200 μA at VOL = 0.8 V
• Built-in digital dimming circuit (10-bit resolution)
• Built-in oscillation circuit (external R and C)
• Built-in Power-On-Reset circuit
• Package options:
    56-pin plastic QFP (QFP56-P-910-0.65-2K)(ML9212GA)