ML9211

E2C0045-19-83 ¡ Semiconductor ¡ Semiconductor ML9211 GENERAL DESCRIPTION This version: Aug. 1999 ML9211 el Pr im in y ar 56-Bit Duplex/Triplex (1/2 duty / 1/3 duty) VF Controller/Driver with Digital Dimming 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 (VDD) : 4.5 to 5.5V : 8 to 18V Driver supply voltage (VDISP) 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 : IOH=–5mA at VOH=VDISP–0.8V (SEG1 to 37) (can be directly connected to VFD tube : IOH=–10mA at VOH=VDISP–0.8V (SEG38 to 56) and require no external resistors) : IOL=500mA at VOL=2V (SEG1 to 56) 3-grid pre-driver outputs ...