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| ICM7228_15 Datasheet, PDF (15/19 Pages) Intersil Corporation – 8-Digit, Microprocessor-Compatible, LED Display Decoder Driver | |||
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ICM7228
SEGMENT
DATA
INTERDIGIT
BLANKING
SHUTDOWN
VDD
P
ï»2kï
COMMON
ANODE
N
SEGMENT
ï»75ï OUTPUT
VSS
FIGURE 12B. SEGMENT DRIVER
FIGURE 12. COMMON ANODE DISPLAY DRIVERS
DIGIT
STROBE
INTERDIGIT
BLANKING
SHUTDOWN
VDD
P
ï»2kï
COMMON
CATHODE
N
DIGIT
ï»15ï OUTPUT
VSS
FIGURE 13A. DIGIT DRIVER
SEGMENT
DATA
INTERDIGIT
BLANKING
VDD
P
ï»200mA
100ï
N
N
ï»2kï
COMMON
CATHODE
SEGMENT
OUTPUT
SHUTDOWN
VSS
N
ï»2kï
VSS
NOTE: When SHUTDOWN goes low INTERDIGIT BLANKING also
stays low.
FIGURE 13B. SEGMENT DRIVER
FIGURE 13. COMMON CATHODE DISPLAY DRIVERS
VDD
DIGIT
OUTPUT
ICM7228A/C
VDD
SEGMENT
OUTPUT
VDD
UP TO
4A
VDD
10K
VSS
VSS
FIGURE 14. DRIVING HIGH CURRENT DISPLAY, COMMON
ANODE ICM7228A/C TO COMMON ANODE
VDD
VDD
100ï
SEGMENT
OUTPUT
ICM7228B
VDD
2N2219
14ïï (100mAPEAK)
DIGIT
OUTPUT
N
ï»15ï
14mA
2N6034
1.4APEAK
VSS
VSS
FIGURE 15. DRIVING HIGH CURRENT DISPLAY, COMMON
CATHODE ICM7228B TO COMMON CATHODE
DISPLAY
15
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