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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
.
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
5
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
V
DD
V
SS
DIP40
1
1
2
2
2
2
2
2
2
2
2
9
10
11
12
13
14
15
16
17
29
30
31
32
33
34
35
36
37
7
8
38
39
4
4
4
4
4
1
2
3
4
5
6
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
N.C.
OUTPUT BIT 32
N.C.
OUTPUT BIT 28
OUTPUT BIT 31
OUTPUT BIT 30
OUTPUT BIT 29
OUTPUT BIT 27
OUTPUT BIT 26
OUTPUT BIT 25
OUTPUT BIT 24
OUTPUT BIT 23
N
O
O
O
B
C
D
O
V
S
V
D
N
O
O
O
O
O
O
O
O
O
O
O
PLCC44
A single pin controls the LED display brightness by
setting a reference current through a variable re-
sistor connected to V
DD
or to a separate supply of
13.2V maximum.
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