HI-8040
August 2005
CMOS HIGH VOLTAGE DISPLAY DRIVER
APPLICATIONS
!
Dichroic Liquid Crystal Displays
!
Standard Liquid Crystal Displays
!
MEMS Drivers
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
voltage 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.
PIN CONFIGURATION
(Top View)
S59
S58
S57
S56
S55
S54
S53
S52
S51
S50
S49
S48
S47
S46
S45
S44
S43
S42
S41
S40
S39
S38
S37
S36
S35
S34
S33
S32
S31
S30
S60
S61
S62
S63
S64
S65
S66
S67
S68
S69
S70
S71
S72
S73
S74
S75
S76
S77
S78
S79
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
100 PIN QUAD CERPACK
FEATURES
!
4 MHz serial input data rate
!
85 segment outputs
!
Cascadable
!
5 Volt inputs translated to 35 Volts
!
T
est 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
FUNCTIONAL BLOCK DIAGRAM
DIN
CL
CS
LD
BPOSC
BPIN
S80
S81
S82
S83
S84
S85
VSS
CS
CL
LD
DIN
BPOSC
BPIN
CONVOT
VDD
DOUT85
CONVOC
VEE
T1
T2
BP
S1
S2
S3
S4
S5
S6
S7
S8
S9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
S29
S28
S27
S26
S25
S24
S23
S22
S21
S20
S19
S18
S17
S16
S15
S14
S13
S12
S11
S10
See page 5 for magnified view
Þ
Þ
Þ
Þ
Þ
Þ
DATA IN
8 5 Sta g e
S h i ft R e g i s t e r
CLK
Þ
DOUT
85
LE
85 Bit Latch
Oscillator
Divider
Vo l ta g e
Tr a n s l a t o r
H i g h Vo l ta g e
B u ff e r
Vo l ta g e
Tr a n s l a t o r s
H i g h Vo l ta g e
Drivers
Þ
BP
85 SEGMENTS
(DS8040 Rev. B)
HOLT INTEGRATED CIRCUITS
www.holtic.com
08/05
HOLTIC [ HOLT INTEGRATED CIRCUITS ]
