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