Datasheet

MAX6950/MAX6951
Serially Interfaced, +2.7V to +5.5V,
5- and 8-Digit LED Display Drivers
4 _______________________________________________________________________________________
INTERNAL OSCILLATOR FREQUENCY
vs. TEMPERATURE
MAX6950/1 toc01
3.60
3.70
3.90
3.80
4.20
4.30
4.10
4.00
4.40
OSCILLATOR FREQUENCY (MHz)
-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
MAX6950/1 toc02
SUPPLY VOLTAGE (V)
OSCILLATOR FREQUENCY (MHz)
0
1.0
0.5
2.0
1.5
3.0
2.5
0 400200 600 800
INTERNAL OSCILLATOR WAVEFORM
AT OSC (PIN 9)
MAX6950/1 toc03
TIMELINE (ns)
VOLTAGE AT OSC (V)
70
72
71
74
73
76
75
77
79
78
80
2.0 3.0 3.52.5 4.0 4.5 5.0 5.5 6.0
DEAD CLOCK OSCILLATOR FREQUENCY
vs. SUPPLY VOLTAGE
MAX6950/1 toc04
SUPPLY VOLTAGE (V)
OSCILLATOR FREQUENCY (kHz)
0.95
0.96
0.97
0.98
0.99
1.00
1.01
2.0 3.02.5 3.5 4.0 4.5 5.0 5.5 6.0
SEGMENT SOURCE CURRENT
vs. SUPPLY VOLTAGE
MAX6950/1 toc05
SUPPLY VOLTAGE (V)
CURRENT NORMALIZED TO 40mA
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
MAX6950/1 toc06
TIMELINE (ns)
VOLTAGE (V)
0 500 1000 1500 2000
DIGIT 0 MULTIPLEX TIMESLOT
Typical Operating Characteristics
(Typical operating circuit, scan limit set to eight digits, V+ = +3.3V, V
LED
= 2.4V, T
A
= +25°C, unless otherwise noted.)