HI-8050 Datasheet, PDF (1/8 Pages) Holt Integrated Circuits – CMOS HIGH VOLTAGE DISPLAY DRIVER

January 2001
HI-8050/51, HI-8150/51
CMOS HIGH VOLTAGE DISPLAY DRIVER
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.
APPLICATIONS
! Dichroic Liquid Crystal Displays
! Standard Liquid Crystal Displays
! 5 Volt Serial Data to Parallel High Voltage
PAD CONFIGURATION (Top View)
BPIN
BPOSC
2
VDD
3
N/C
4
CONVOSC
5
CONVOUT
6
VEE
7
S37
8
S38
9
S1
10
S2
11
S3
12
S4
13
S5
14
S6
15
S7
16
HI-8050PQI
HI-8150PQI
HI-8050PQT
&
HI-8150PQT
48
S27
47
S26
46
S25
45
S24
44
S23
43
S22
42
S21
41
S20
40
DOUT38
39
DOUT32
38
DOUT30
37
T2
36
T1
35
N/C
34
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
ÞÞ
CS Þ
8020OPT Þ
LD Þ
BPIN
BPOSC
ÞÞ
CONTROL
LOGIC
Oscillator
Divider
Voltage
Translator
DATA IN
38 Stage
Shift Register
CLK
LE _{3 8 B i t L a t c h}
Voltage
Translators
High Voltage
Drivers
High Voltage
Buffer
Þ BPOUT
38 SEGMENTS
DOUT38
DOUT32
DOUT30
(DS8050 Rev. C)
HOLT INTEGRATED CIRCUITS
1
01/01