HI-8050/51, HI-8150/51
January 2001
CMOS HIGH VOLTAGE DISPLAY DRIVER
APPLICATIONS
!
Dichroic Liquid Crystal Displays
!
Standard Liquid Crystal Displays
!
5 Volt Serial Data to Parallel High Voltage
GENERAL DESCRIPTION
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
blanking of the display if the +5V power is lost.
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
considerably faster serial input data rate.
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
allowing the cascading ofmultiple drivers for larger displays.
The device layout supports all previous pinouts of the
HI-8010/HI-8020 products. In addition, new technology and
features afford new packaging options. Consult your Holt
Sales Representative to explore the possibilities.
PAD CONFIGURATION
(Top View)
BPIN
BPOSC
VDD
N/C
CONVOSC
CONVOUT
VEE
S37
S38
S1
S2
S3
S4
S5
S6
S7
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
HI-8050PQI
HI-8150PQI
HI-8050PQT
&
HI-8150PQT
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
S27
S26
S25
S24
S23
S22
S21
S20
DOUT38
DOUT32
DOUT30
T2
T1
N/C
BPOUT
N/C
(See page 3-32A for HI-8051 & HI-8151 pin configurations)
FEATURES
!
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
FUNCTIONAL BLOCK DIAGRAM
DIN
CL
Þ
Þ
CS
Þ
Þ
LD
DATA IN
38 Stage
Shift Register
CLK
DOUT38
DOUT32
DOUT30
8020OPT
CONTROL
LOGIC
LE
Þ
BPIN
Þ
BPOSC
Þ
38 Bit Latch
Oscillator
Divider
Voltage
Translator
H i g h Voltage
Buffer
Voltage
Translators
H i g h Voltage
Drivers
Þ
BPOUT
HOLT INTEGRATED CIRCUITS
1
38 SEGMENTS
(DS8050 Rev. C)
01/01
HOLTIC [ HOLT INTEGRATED CIRCUITS ]
