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

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.

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Dichroic Liquid Crystal Displays

Standard Liquid Crystal Displays

! MEMS Drivers

APPLICATIONS

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4 MHz serial input data rate

85 segment outputs

Cascadable

5 Volt inputs translated to 35 Volts

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

T

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Oscillator

Divider

Voltage

Tr anslator

High Voltage

Buf f er

85 Stage

Shift R egister

85 Bit L atch

Voltage

Tr anslators

High Voltage

Drivers

85 SEGMENTS

DIN

LD

BPOSC

BPIN

Þ

Þ

Þ

Þ

Þ

Þ

CL

CS

DATA IN

CLK

LE

Þ

DOUT

85

See page 5 for magnified view

March 2007

(DS8040, Rev. C)

03/07

CMOS High Voltage

Display Driver

S29

S28

S27

S26

S25

S24

S23

S22

S21

S20

S19

S18

S17

S16

S15

S14

S13

S12

S11

S10

S60

S61

S62

S63

S64

S65

S66

S67

S68

S69

S70

S71

S72

S73

S74

S75

S76

S77

S78

S79

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100

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100 PIN QUAD CERPACK

HOLT INTEGRATED CIRCUITS

www.holtic.com