Rainbow Electronics MAX6959 - Manual (Page 4)

MAX6958/MAX6959
2-Wire Interfaced, 3V to 5.5V, 4-Digit,
9-Segment LED Display Drivers with Keyscan
4 _______________________________________________________________________________________
Typical Operating Characteristics
(V+ = 5V, LED forward voltage = 2.4V, T A = +25°C, unless otherwise noted.)
SCAN RATE (f SCAN )
vs. TEMPERATURE
MAX6958/59 toc01
TEMPERATURE ( °C)
SCAN RATE (Hz)
100 80 40 60 0 20 -20
760
765
770
775
780
785
790
795
800
755
-40 120
5.5V
5V
3V
4.5V
KEYSCAN DEBOUNCE TIME (t DEBOUNCE )
vs. TEMPERATURE
MAX6958/59 toc02
TEMPERATURE ( °C)
KEYSCAN DEBOUNCE TIME (ms)
100 80 60 40 20 0 -20
40.5
41.0
41.5
42.0
42.5
40.0
-40 120
4.5V
5V
3V
5.5V
SCAN RATE (f SCAN )
vs. SUPPLY VOLTAGE
MAX6958/59 toc03
SUPPLY VOLTAGE (V)
SCAN RATE (Hz)
5.0 4.5 4.0 3.5
765
770
775
780
785
790
760
3.0 5.5
KEYSCAN DEBOUNCE TIME (t DEBOUNCE )
vs. SUPPLY VOLTAGE
MAX6958/59 toc04
SUPPLY VOLTAGE (V)
KEYSCAN DEBOUNCE TIME (ms)
5.0 4.5 4.0 3.5
40.6
40.8
41.0
41.2
41.4
41.6
41.8
42.0
42.2
40.4
3.0 5.5
SEGMENT SOURCE CURRENT
vs. SUPPLY VOLTAGE
MAX6958/59 toc05
SUPPLY VOLTAGE (V)
SEGMENT SOURCE CURRENT (mA)
5.25 5.00 4.75
5
10
15
20
25
0
4.50 5.50
V LED = 2.4V
SEGMENT SOURCE CURRENT
vs. SUPPLY VOLTAGE
MAX6958/59 toc06
SUPPLY VOLTAGE (V)
SEGMENT SOURCE CURRENT (mA)
4.5 4.0 3.5
5
10
15
20
25
0
3.0 5.0 5.5
V LED = 2V
WAVEFORM AT DIG0/SEG0,
FULL INTENSITY
MAX6958/59 toc07
V DIG0 /
SEG0
1V/div
200 µs/div
INPUT PULLUP CURRENT
vs. TEMPERATURE
MAX6958/59 toc08
TEMPERATURE ( °C)
INPUT PULLUP CURRENT (
µ
A)
100 80 40 60 0 20 -20
5
10
15
20
25
30
35
40
45
0
-40 120
5.5V
5V
3V
4.5V