FEDL9213-01

1Semiconductor

This version: Oct. 2001

ML9213

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

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GENERAL DESCRIPTION

The ML9213 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.

ML9213 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.

ML9213 provides an interface with a microcontroller only by three signal lines: DATA IN, CLOCK and CS.

FEATURES

N Logic supply voltage (V

: 5.0 V

H10%

N Driver supply voltage (V

: 8.0 to 18.0 V

N 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

N Number of display segments

112 segments max. (during 1/2 duty mode)

168 segments max. (during 1/3 duty mode)

N Master/Slave selectable

M/

S = “H” level

: Master mode

M/

S = “L” level

: Slave mode

N Interface with a microcontroller

Three lines: CS, CLOCK, and DATA IN

N 56-segment driver outputs

: I

(can be directly connected to VFD tube

: I

and requires no external resistors)

: I

2A at V

N 3-grid pre-driver outputs

: I

(requires external drivers)

I

N Logic outputs

: I

2A at V

I

2A at V

N Built-in anode digital dimming circuit (10-bit resolution)

N Built-in oscillation circuit (external resistor and capacitor)

N Built-in Power-On-Reset circuit

N Package options:

80-pin plastic QFP (QFP80-P-1420-0.80-BK)

Product name: ML9213GA

80-pin plastic QFP (QFP80-P-1414-0.65-K)

Product name: ML9213GP