HI-8045

GENERAL DESCRIPTION

The HI-8045 high voltage display driver is a low cost

plastic, 80-segment version of the Holt HI-8040 display

driver series. The 20 mil package lead pitch allows the

maximum number of display driver segments in the

smallest space.

An optional voltage converter can

generate the negative display drive voltage. Test inputs

facilitate opens and shorts testing.

The backplane fre-

quency is checked and, as long as power is available, the

segments are shut "Off" if the frequency becomes too low.

The HI-8045 and the HI-80XX series of display drivers all

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 transi-

tions 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.

!

!

Dichroic Liquid Crystal Displays

Standard Liquid Crystal Displays

! MEMS Drivers

APPLICATIONS

!

!

!

!

!

!

!

!

!

4 MHz serial input data rate

80 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

Industrial and JEDEC processing available

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Oscillator

Divider

Voltage

Tr anslator

High Voltage

Buf f er

85 Stage

Shift R egister

80 Bit L atch

Voltage

Tr anslators

High Voltage

Drivers

80 SEGMENTS

DIN

LD

BPOSC

BPIN

Þ

Þ

Þ

Þ

Þ

Þ

CL

CS

DATA IN

CLK

LE

Þ

DOUT

85

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

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

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

N/C

V

LD

DIN

BPOSC

N/C

N/C

BPIN

N/C

CONVOUT

V

DOUT 85

CONVOSC

V

T1

T2

BP

S1

S2

S3

S4

S5

S6

SS

DD

EE

CS

CL

HI-8045PQ

80 - SEGMENT

100 - PIN

PLASTIC

QUAD FLAT PACK

March 2007

(DS8045, Rev. E)

03/07

CMOS High Voltage

Display Driver

HOLT INTEGRATED CIRCUITS

www.holtic.com