HI-8040 Datasheet, PDF (1/6 Pages) Holt Integrated Circuits – CMOS HIGH VOLTAGE DISPLAY DRIVER

September 1999
HI-8040
GENERAL DESCRIPTION
The HI-8040 is a CMOS integrated circuit designed for high
voltage LCD display drive applications. It can drive 85
segments at voltages between +5 and -30 volts. An optional
negative converter can generate the negative display drive
voltage. Test inputs facilitate opens and shorts testing. The
backplane frequency is checked and, as long as power is
available, the segments are shut "Off" if the frequency
becomes too low.
The HI-8040 is part of a family of display drivers which
control segment information in the same way. Data is
serially clocked into the device and the data for all segment
outputs are latched in parallel when the Load input
transitions from high to low. With the Data Out from the shift
register available, devices may be cascaded to obtain more
segment outputs. The shift register is 85 bits long.
The die is metal mask programmable to provide for various
package and/or cascade tap options. Consult your Holt
Sales representative to explore the possibilities.
APPLICATIONS
! Dichroic Liquid Crystal Displays
! Standard Liquid Crystal Displays
PIN CONFIGURATION (Top View)
S60
81
S61
82
S62
83
S63
84
S64
85
S65
86
S66
87
S67
88
S68
89
S69
90
S70
91
S71
92
S72
93
S73
94
S74
95
S75
96
S76
97
S77
98
S78
99
S79
100
100 PIN QUAD CERPACK
50
S29
49
S28
48
S27
47
S26
46
S25
45
S24
44
S23
43
S22
42
S21
41
S20
40
S19
39
S18
38
S17
37
S16
36
S15
35
S14
34
S13
33
S12
32
S11
31
S10
FEATURES
! 4 MHz serial input data rate
! 85 segment outputs
! Cascadable
! 5 Volt inputs translated to 35 Volts
! Test pins allow hardware all "ON", all "OFF" or
alternating
! Monitors backplane oscillation and forces all
segments to "OFF" condition if below 10Hz
! Negative voltage converter available on-chip
! CMOS low power
! Military processing available
See page 3-19 for magnified view
FUNCTIONAL BLOCK DIAGRAM
DIN Þ
CL Þ
CS Þ
LD Þ
BPOSC
BPIN
ÞÞ
Oscillator
Divider
Voltage
Translator
High Voltage
Buffer
Þ BP
DATA IN
85 Stage
Shift Register
CLK
DOUT
85
LE _{8 5 B i t L a t c h}
Voltage
Translators
High Voltage
Drivers
85 SEGMENTS
HOLT INTEGRATED CIRCUITS
(DS8040 Rev. NEW)
3-15
9/99