GENERAL DESCRIPTION
The MSC1230 is a Bi-CMOS display driver with digital dimming function. It enables switching between 1/3-duty vacuum fluorescent (VF) display tube and universal VF display tube by pin control.
The MSC1230 consists of a 112-bit shift register, a 111-bit latch, a 10-bit digital dimming circuit, 37 segment drivers, and 3 grid drivers.

FEATURES
• Power supply voltage : VDD=8 V to 18 V (built-in 5 V regulator for logic circuit)
• Operating temperature range : Ta=–40 °C to +85 °C
• 37-segment driver outputs : IOH=–6 mA at VOH = VDD –0.8 V
• 3-grid driver outputs : IOH=–30 mA at VOH = VDD –0.8 V
• Built-in digital dimming circuit (10-bit resolution)
• Switchable between 1/3-duty VF display tube and universal VF display tube*
    When SEL pin is left open : Selects universal VF display tube (The grids GRID1, GRID2, and GRID1+GRID2 are turned on repeatedly in this order)
    When SEL pin is used at 0 V : Selects 1/3-duty VF display tube (The grids GRID1, GRID2, and GRID3 are turned on repeatedly in this order)
• Built-in oscillation circuit (external R and C)
• Built-in Power-On-Reset circuit
• Package:
    56-pin plastic QFP (QFP56-P-910-0.65-2K)(Product name: MSC1230GS-2K)