
HI-8050/51, HI-8150/51
CMOS HIGH VOLTAGE DISPLAY DRIVER
GENERALDESCRIPTION
The HI-8050, HI-8051, HI-8150 and HI-8151 are CMOS
integrated circuits designed for high voltage LCD display
drive applications. The HI-8050 & HI-8051 have TTL logic
inputs whereas the HI-8150 & HI-8151 have CMOS logic
inputs. They drive up to 38 segments at voltages between
+5 and -30 volts. The optional negative converter on the
HI-8050 & HI-8150 can be used to generate the negative
display drive voltage.
All products have test inputs to
facilitate opens and shorts testing as well as automatic
blankingof thedisplayifthe+5Vpowerislost.
The HI-8050 and HI-8150 are designed to replace the
HI-8010 and HI-8020 devices in all 5 volt applications. They
offer significantly enhanced ESD protection along with a
considerablyfasterserialinputdatarate.
The data is serially clocked into the device on the negative
edge of the clock and latched in parallel to the segment
outputs on the high to low transition of the load input. Serial
output data changes on the positive edge of the clock
allowingthecascadingofmultipledriversforlargerdisplays.
The device layout supports all previous pinouts of the
HI-8010/HI-8020 products. Inaddition, newtechnologyand
features afford new packaging options. Consult your Holt
SalesRepresentativetoexplorethepossibilities.
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5 Volt Serial Data to Parallel High Voltage
Dichroic Liquid Crystal Displays
Standard Liquid Crystal Displays
APPLICATIONS
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4 MHz serial input data rate
38 segment outputs
Cascadable
5 Volt inputs translated to 35 Volts
Test pins allow hardware all "ON", all "OFF" or
alternating
Monitors 5 volt supply and forces all
segments to "OFF" condition if lost
Negative voltage converter available on-chip
CMOS low power
Military processing available
FEATURES
PAD CONFIGURATION
(Top View)
FUNCTIONAL BLOCK DIAGRAM
Oscillator
Divider
Voltage
Translator
High Voltage
Buffer
38 Stage
Shift Register
38 Bit Latch
Voltage
Translators
High Voltage
Drivers
BPOUT
38 SEGMENTS
DIN
CL
LD
BPIN
BPOSC
CS
8020OPT
DATA IN
CLK
LE
DOUT38
DOUT32
DOUT30
CONTROL
LOGIC
January 2001
BPIN
BPOSC
VDD
N/C
CONVOSC
CONVOUT
VEE
S37
S38
S1
S2
S3
S4
S5
S6
S7
S27
S26
S25
S24
S23
S22
S21
S20
DOUT38
DOUT32
DOUT30
T2
T1
N/C
BPOUT
N/C
HI-8050PQI
HI-8150PQI
HI-8050PQT
&
HI-8150PQT
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
(See page 3-32A for HI-8051 & HI-8151 pin configurations)
HOLT INTEGRATED CIRCUITS
1
(DS8050 Rev. C)
01/01