8-39
Application Hint 2 Micrel
8
1997
Application Hint 2
MIC8030/8031 Application Hints
MlC8030/MIC8031 Application Hints on Compatibility with
Display Drivers Produced by AMI and HOLT
The MIC8030/MIC8031 can be made compatible with all
bonding options of the Gould-AMI S4520 as well as all
bonding options of the HOLT HI-8010. However, the high
voltage supply must be positive with respect to ground for the
MIC8030/MIC8031. Both AMI and HOLT use a negative High
Voltage. See MIC8010/11/12/13 family for drop in replace-
ments in existing sockets.
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41
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Seg 20
GOULD
AMI
S4520G
9
10
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13
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16
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19
20
21
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4028
27
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Chip Select
Data In
LCD0
LCD0 Opt.
Seg 2
Seg 3
Seg 21
Seg 22
Seg 23
Seg 24
Seg 25
Seg 28
Seg 29
Seg 30
Seg 31
Seg 32
SS
V
CC
V
Data Out 32
Back Plate
Seg 17
Seg 16
Seg 15
Seg 14
Seg 13
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BB
V
Seg 19
Seg 18
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Seg 1
Clock
Load
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Seg 26
N/C
MIC8030/MIC8031
Standard 44 Pin Quad Package
S4520G
AMI 44 Pin Quad Package
High Voltage Supply
Absolute
Device Vmin Vmax Max
MIC8031 20V 100V 110V
MIC8030 20V 50V 75V
HI-8010 Vlogic-35V +0.3V Vlogic-35V
S4520 Vlogic-32V +0.3V Vlogic-32V
Logic Power Supply
Absolute
Device Vmin Vmax Max
MIC8031 4.5V 16.5V 18V
MIC8030 4.5V 5.5V 18V
HI-8010 3.0V 18.0V 18V
S4520 3.0V 16.0V 17V
As can been seen above, the MIC8030/MIC8031 are supe-
rior to both AMI and HOLT in the voltage that can be applied
to a Dichroic LCD display. Using the MIC8030/MIC8031
allows for a derating of 50%/70% if operated at 35V; the
HI-8010 allows for no derating at 35V and the S4520 allows
for no derating at 32V.
When placing the MIC8030/MIC8031 in a pin compatible
configuration on a board which previously used a HOLT or
AMI device, care must be taken before changing the polarity
of the High Voltage Supply, to reverse the direction of any
polarized filter capacitor on the High Voltage line, as well
check any other circuit (like a zener diode, etc) which contacts
the High Voltage line.
The pin out drawings match the MIC8030/MIC8031 to the
S4520. By moving the No-Connect, from pin 41 to pin 13 and
shifting the displaced signals clockwise, the pin out can be
matched.
Other pin outs that can be matched are the S4520A, S4520B,
S4520C, S4520S, S4520F, S4520G, Hl-8010L5, HI-8010L6,
HI-8010L7, HI-8010C5, Hl-8010C6, and the HI-8010C7. Other
packaging options are available, all options must use a
positive VBB.
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Seg 20
MIC8030
MIC8031
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4028
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Chip Select
Data In
LCD0
LCD0 Opt.
Seg 2
Seg 3
Seg 21
Seg 22
Seg 23
Seg 24
Seg 25
Seg 28
Seg 29
Seg 30
Seg 31
Seg 32
SS
V
CC
V
Data Out 32
Back Plate
Seg 17
Seg 16
Seg 15
Seg 14
Seg 13
Seg 12
Seg 11
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Seg 9
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BB
V
Seg 19
N/C
Seg 18
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Seg 1
Clock
Load
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Seg 26
