ML9227 Datasheet, PDF (1/26 Pages) OKI electronic componets – 27-Bit Duplex/Triplex VFD Controller/Driver with Digital Dimming, ADC and Key scan

OKI Semiconductor
FEDL9227-01
Issue Date:Dec., 18, 2002
ML9227
27-Bit Duplex/Triplex VFD Controller/Driver with Digital Dimming, ADC and Key scan
GENERAL DESCRIPTION
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.
FEATURES
• Supply voltage (V_DISP)
: 8 to 18.5 V (Built-in 5 V regulator for logic)
• Duplex/Triplex selectable
• Applicable VFD tube
: 2 Grids × 27 Anodes VFD tube
: 3 Grids × 27 Anodes VFD tube
• 27-segment driver outputs
: I_OH = –5 mA at V_OH = V_DISP–0.8 V (SEG1 to 19)
I_OH = –10 mA at V_OH = V_DISP–0.8 V (SEG20 to 27)
I_OL = 500 uA at V_OL = 2.0 V (SEG1 to 27)
• 3-grid pre-driver outputs
: I_OH = –5 mA at V_OH = V_DISP–0.8 V
I_OL = 10 mA at V_OL = 2.0 V
• Built-in digital dimming circuit (10-bit resolution)
• Built-in 6-ch A/D converter
• Built-in 5 × 5 keyscan circuit
• Interface circuit for an encoder type rotary switch
• Built-in oscillation circuit (external R and C)
• Built-in Power-On-Reset circuit
• Package:
64-pin plastic QFP (QFP64-P-1420-1.00-BK) Product name: ML9227GA
1/26