FEDL9213-01
1
Semiconductor
ML9213
GENERAL DESCRIPTION
This version: Oct. 2001
56-Bit Duplex/Triplex (1/2 duty/1/3 duty) VFD Controller/Driver with Anode Digital Dimming
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
DD
)
: 5.0 V
H10%
N
Driver supply voltage (V
DISP
)
: 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
: Master mode
M/
S
= “H” level
M/
S
= “L” level
: Slave mode
N
Interface with a microcontroller
Three lines: CS, CLOCK, and DATA IN
N
56-segment driver outputs
: I
OH
= –5.0 mA at V
OH
= V
DISP
–0.8 V (SEG1 to 37)
(can be directly connected to VFD tube : I
OH
= –10.0 mA at V
OH
= V
DISP
–0.8 V (SEG38 to 56)
and requires no external resistors)
: I
OL
= 500
2A
at V
OL
= 2.0 V (SEG1 to 56)
N
3-grid pre-driver outputs
: I
OH
= –5.0 mA at V
OH
= V
DISP
–0.8 V
(requires external drivers)
I
OL
= 10.0 mA at V
OL
= 2.0 V
N
Logic outputs
: I
OH
= –200
2A
at V
OH
= V
DD
–0.8 V
I
OL
= 200
2A
at V
OL
= 0.8 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
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