
ICM7243
Timing Waveforms
(Continued)
INTERNAL
INTER-CHARACTER
BLANKING
SIGNAL
CHAR 1
CHAR 2
CHAR 3
~ 5μs
~ 300μs
CHARACTERS
DRIVE
SIGNALS
CHAR 4
CHAR 5
CHAR 6
CHAR 7
CHAR 8
Performance Curves
30
FIGURE 3. DISPLAY CHARACTERS MULTIPLEX TIMING DIAGRAM
INTER-CHARACTER BLANKING
20
V DD = 5.5V
500
400
300
V DD = 5.5V
10
4.5V
5.0V
200
100
4.5V
5.0V
0
0
1
2
3
0
1
2
3
SEGMENT VOLTAGE (V)
FIGURE 4. SEGMENT CURRENT vs OUTPUT VOLTAGE
7
SEGMENT VOLTAGE (V)
FIGURE 5. CHARACTER CURRENT vs OUPUT VOLTAGE
FN3162.4
March 4, 2010