Datasheet

14
ICM7228
SEGMENT
DATA
INTERDIGIT
BLANKING
SHUTDOWN
V
DD
COMMON
ANODE
SEGMENT
OUTPUT
≈2kΩ
V
SS
N
P
≈75Ω
FIGURE 12B. SEGMENT DRIVER
FIGURE 12. COMMON ANODE DISPLAY DRIVERS
DIGIT
STROBE
INTERDIGIT
BLANKING
SHUTDOWN
V
DD
COMMON
CATHODE
DIGIT
OUTPUT
≈2kΩ
V
SS
N
P
≈15Ω
FIGURE 13A. DIGIT DRIVER
SEGMENT
DATA
INTERDIGIT
BLANKING
SHUTDOWN
V
DD
≈200mA
COMMON
CATHODE
SEGMENT
OUTPUT
≈2kΩ
N
V
SS
P
≈2kΩ
N
V
SS
N
100Ω
NOTE: When SHUTDOWN goes low INTERDIGIT BLANKING also
stays low.
FIGURE 13B. SEGMENT DRIVER
FIGURE 13. COMMON CATHODE DISPLAY DRIVERS
V
DD
ICM7228A/C
SEGMENT
OUTPUT
DIGIT
OUTPUT
V
SS
UP TO
10K
V
DD
V
SS
V
DD
V
DD
4A
FIGURE 14. DRIVING HIGH CURRENT DISPLAY, COMMON
ANODE ICM7228A/C TO COMMON ANODE
V
DD
ICM7228B
100Ω
SEGMENT
OUTPUT
DIGIT
OUTPUT
N
V
SS
≈15Ω
2N6034
14Ω (100mA
PEAK
)
2N2219
V
SS
V
DD
1.4A
PEAK
14mA
V
DD
FIGURE 15. DRIVING HIGH CURRENT DISPLAY, COMMON
CATHODE ICM7228B TO COMMON CATHODE
DISPLAY