Serially Interfaced, 8-Digit LED Display Drivers
MAX7219/MAX7221
__________________________________________Typical Operating Characteristics
(V+ = +5V, T
A
= +25°C, unless otherwise noted.)
SCAN FREQUENCY vs.
POSITIVE SUPPLY VOLTAGE
MAX7219/21 01
SEGMENT DRIVER OUTPUT CURRENT
vs. OUTPUT VOLTAGE
MAX7219/21 02
830
820
810
SCAN FREQUENCY (Hz)
800
790
780
770
760
750
740
730
4.0
4.4
4.8
5.2
5.6
70
60
OUTPUT CURRENT (mA)
R
SET
= 10kΩ
50
40
30
20
10
0
R
SET
= 20kΩ
R
SET
= 40kΩ
6.0
0
1
2
3
4
5
POSITIVE SUPPLY VOLTAGE (V)
OUTPUT VOLTAGE (V)
MAX7219
SEGMENT OUTPUT CURRENT
MAX7219/21 03
MAX7221
SEGMENT OUTPUT CURRENT
MAXIMUM INTENSITY = 15/16
MAX7219/21 04
MAXIMUM INTENSITY = 31/32
10mA/div
10mA/div
0
0
5µs/div
5µs/div
4
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