¡ Semiconductor

ML9211

1/19

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

: 4.5 to 5.5V

: 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

(can be directly connected to VFD tube

and require no external resistors)

• 3-grid pre-driver outputs

(require external drivers)

• Logic outputs

• 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

¡ Semiconductor

ML9211

56-Bit Duplex/Triplex (1/2 duty / 1/3 duty) VF Controller/Driver with Digital Dimming

E2C0045-19-83

This version: Aug. 1999