CASCADING- EXT. OSCILLATOR

HI-8020/HI-8120 Series

CASCADING- RC OSCILLATOR

DIN

HI-8020J-85

CS

LCDØ

CL

LD

DOUT

BP

SEGMENTS

1- 33

DIN

HI-8020J-85

CS

LCDØ

CL

LD

DOUT

BP

SEGMENTS

33- 64

DIN

HI-8020J-85

CS

LCDØ

CL

LD

DOUT

BP

SEGMENTS

65- 96

BACK

PLANE

LD

CL

CS

DIN

HI-8120J-85

CS

LCDØ

CL

LD

DOUT

BP

SEGMENTS

1- 32

LCDØ OPT

DIN

HI-8120J-85

CS

LCDØ

CL

LD

DOUT

BP

SEGMENTS

33- 64

LCDØ OPT

DIN

HI-8120J-85

CS

LCDØ

CL

LD

DOUT

BP

SEGMENTS

65- 96

LCDØ OPT

BACK

PLANE

470pf

150K

W

LD

CL

CS

Figure 2

Figure 3

HOLT INTEGRATED CIRCUITS

3-12

ADDITIONAL HI-8020/HI-8120 PIN CONFIGURATIONS

(See page 3-9 for 44-Pin Plastic PLCC)

S5

S4

S3

S2

S1

S38

S37

V

LCDØ

DIN

LD

DD

CL

S17

S18

S19

BP

DOUT 38

S20

S21

S22

S23

S24

S25

S26

7

8

9

10

11

12

13

14

15

16

17

18

42

41

40

39

38

37

36

35

34

33

32

HI-8020S-61

HI-8120S-61

HI-8020SM-62

&

HI-8120SM-62

48- PIN

CERAMIC

LCC

S5

S4

S3

S2

S1

S38

S37

V

DIN

LD

DD

LCDØ/LCDØOPT

CL

S17

S18

S19

BP

DOUT 38

S20

S21

S22

S23

S24

S25

S26

7

8

9

10

11

12

13

14

15

16

17

18

42

41

40

39

38

37

36

35

34

33

32

HI-8020S-63

HI-8120S-63

HI-8020SM-64

&

HI-8120SM-64

48- PIN

CERAMIC

LCC

PIN DESCRIPTIONS

SYMBOL

FUNCTION

DESCRIPTION

VSS

POWER

0 Volts

INPUT

Logic input

Chip select

INPUT

Logic input

Clocks shift register on negative edge and DOUT pins on positive edge

LD

INPUT

Logic input

Segment outputs equal shift register data if Load is high

DIN

INPUT

Logic input

Shift register data input

LCD0

INPUT

Analog input

Display clock input and is always bonded out. Can swing from VEE to VDD

LCD0OPT

OUTPUT

Analog output

Bonded out only if an RC oscillator is required

VDD

POWER

5 Volts

VEE

POWER

O Volts to -30 Volts

DOUT

OUTPUT

Logic output

Selected pinout can provide shift register taps at positions 30, 32, 34, or 38

BP

OUTPUT

Display drive output

Low resistance drive for the backplane and swings from VDD to VEE

Segments

OUTPUT

Display drive output

High resistance drive for each segment and swings from VDD to VEE

CS

CL