M5450

M5451

LED DISPLAY DRIVERS

September 1993

.

M5450 34 OUTPUTS/15mA SINK

.

M5451 35 OUTPUTS/15mA SINK

.

CURRENT GENERATOR OUTPUTS (NO EX-

TERNAL RESISTORS REQUIRED)

.

CONTINUOUS BRIGHTNESS CONTROL

.

SERIAL DATA INPUT

.

ENABLE (ON M5450)

.

WIDE SUPPLY VOLTAGE OPERATION

.

TTL COMPATIBILITY

Application Examples :

.

MICROPROCESSOR DISPLAYS

.

INDUSTRIAL CONTROL INDICATOR

.

RELAY DRIVER

.

INSTRUMENTATION READOUTS

DESCRIPTION

The M5450 and M5451 are monolithic MOS inte-

grated circuits produced with an N-channel silicon

gate technology. They are available in 40-pin dual

in-line plastic packages.

DIP40

(Plastic Package)

ORDER CODE : M5450B7 / M5451B7

PLCC44

(Plastic Chip Carrier)

ORDER CODE : M5451Q

PIN CONNECTION

1

2

3

4

5

6

7

8

9

10

11

12

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

13

14

15

16

17

18

19

20

24

23

22

21

OUTPUT BIT 17

OUTPUT BIT 16

OUTPUT BIT 15

OUTPUT BIT 14

OUTPUT BIT 13

OUTPUT BIT 12

OUTPUT BIT 11

OUTPUT BIT 10

OUTPUT BIT 9

OUTPUT BIT 8

OUTPUT BIT 7

OUTPUT BIT 6

OUTPUT BIT 5

OUTPUT BIT 4

OUTPUT BIT 3

OUTPUT BIT 2

OUTPUT BIT 1

BRIGHTNESS CONTROL

OUTPUT BIT 18

OUTPUT BIT 19

OUTPUT BIT 20

OUTPUT BIT 21

OUTPUT BIT 22

OUTPUT BIT 23

OUTPUT BIT 24

OUTPUT BIT 25

OUTPUT BIT 26

OUTPUT BIT 27

OUTPUT BIT 28

OUTPUT BIT 29

OUTPUT BIT 30

OUTPUT BIT 31

OUTPUT BIT 32

OUTPUT BIT 33

OUTPUT BIT 34

DATA ENABLE FOR M5450

OUTPUT BIT 35 FOR M5451

DATA IN

CLOCK IN

DIP40

9

10

11

12

13

14

15

16

17

29

30

31

32

33

34

35

36

37

7

8

38

39

OUTPUT BIT 13

OUTPUT BIT 12

OUTPUT BIT 11

OUTPUT BIT 10

OUTPUT BIT 9

OUTPUT BIT 8

OUTPUT BIT 7

N.C.

OUTPUT BIT 6

OUTPUT BIT 32

N.C.

OUTPUT BIT 31

OUTPUT BIT 30

OUTPUT BIT 29

OUTPUT BIT 28

OUTPUT BIT 27

OUTPUT BIT 26

OUTPUT BIT 25

OUTPUT BIT 24

OUTPUT BIT 23

OUTPUT BIT 5

OUTPUT BIT 4

PLCC44

A single pin controls the LED display brightness by

setting a reference current through a variable re-

13.2V maximum.

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