Serially Interfaced, +2.7V to +5.5V,

5- and 8-Digit LED Display Drivers

4

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INTERNAL OSCILLATOR FREQUENCY

vs. TEMPERATURE

3.60

3.70

3.90

3.80

4.20

4.30

4.10

4.00

4.40

-40

0

20

-20

40

60

80

TEMPERATURE (

°C)

V+ = 2.7V

V+ = 3.3V

V+ = 5V

3.60

3.70

3.80

3.90

4.00

4.10

4.20

4.30

4.40

23456

INTERNAL OSCILLATOR FREQUENCY

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

0

1.0

0.5

2.0

1.5

3.0

2.5

0

400

200

600

800

INTERNAL OSCILLATOR WAVEFORM

AT OSC (PIN 9)

TIMELINE (ns)

70

72

71

74

73

76

75

77

79

78

80

2.0

3.0

3.5

2.5

4.0

4.5

5.0

5.5

6.0

DEAD CLOCK OSCILLATOR FREQUENCY

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

0.95

0.96

0.97

0.98

0.99

1.00

1.01

2.0

3.0

2.5

3.5

4.0

4.5

5.0

5.5

6.0

SEGMENT SOURCE CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

0

1.0

0.5

2.0

1.5

3.0

2.5

3.5

WAVEFORM AT SEGO/DIGO (PIN 6)

V+ = 3.3V, 8 DIGITS SCANNED, 8/16 INTENSITY

TIMELINE (ns)

0

500

1000

1500

2000

DIGIT 0 MULTIPLEX TIMESLOT

Typical Operating Characteristics