ML9211 Datasheet, PDF (1/20 Pages) OKI electronic componets – 56-Bit Duplex/Triplex (1/2 duty / 1/3 duty) VF Controller/Driver with Digital Dimming

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ML9211
56-Bit Duplex/Triplex (1/2 duty / 1/3 duty) VF Controller/Driver with Digital Dimming
GENERAL DESCRIPTION
The ML9211 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 56-segment driver multiplexed to drive up to
168 segments, and 10-bit digital dimming circuit.
ML9211 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.
ML9211 provides an interface with a microcontroller only by three signal lines: DATA IN,
CLOCK and CS.
FEATURES
• Logic supply voltage (V_DD)
: 4.5 to 5.5V
• Driver supply voltage (V_DISP)
: 8 to 18V
• 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. 112-segment display (during 1/2 duty mode)
Max. 168-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
• 56-segment driver outputs
: I_OH=–5mA at V_OH=V_DISP–0.8V (SEG1 to 37)
(can be directly connected to VFD tube : I_OH=–10mA at V_OH=V_DISP–0.8V (SEG38 to 56)
and require no external resistors)
: I_OL=500mA at V_OL=2V (SEG1 to 56)
• 3-grid pre-driver outputs
: I_OH=–5.0mA at V_OH=V_DISP–0.8V
(require external drivers)
I_OL=10mA at V_OL=2V
• Logic outputs
: I_OH=–200mA at V_OH=V_DD–0.8V
I_OL=200mA at V_OL=0.8V
• Built-in digital dimming circuit (10-bit resolution)
• Built-in oscillation circuit (external R and C)
• Built-in Power-On-Reset circuit
• Package options:
80-pin plastic QFP (QFP80-P-1420-0.80-BK) Product name: ML9211GA
80-pin plastic QFP (QFP80-P-1414-0.65-K) Product name: ML9211GP
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