ICM7224 Datasheet, PDF (2/7 Pages) Intersil Corporation – 41/2 Digit LCD Display Counter

Functional Block Diagram
ICM7224
LSD
DIGIT 1
SEGMENT OUTPUTS
DIGIT 2
SEGMENT OUTPUTS
7 WIDE DRIVER
7 WIDE DRIVER
DIGIT 3
SEGMENT OUTPUTS
DIGIT 4
SEGMENT OUTPUTS
MSD
1_{/2 DIGIT}
OUTPUT
7 WIDE DRIVER
7 WIDE DRIVER
1_{/2 DIGIT}
DRIVER
STORE
7 WIDE LATCH
7 WIDE LATCH
7 WIDE LATCH
7 WIDE LATCH
1_{/2 DIGIT}
LATCH
LEADING
ZERO
BLANKING
OUTPUT
COUNT
INHIBIT
COUNT
INPUT
SCHMITT
TRIGGER
RESET
DECODER
Q
÷2
CL
R
CL
÷5
Q
R
DECODER
Q
÷2
CL
R
CL
÷5
Q
R
OSCILLATOR
INPUT
OSCILLATOR
+124
BLACKPLANE
DRIVER
ENABLE
DECODER
Q
÷2
CL
R
CL
÷5
Q
R
DECODER
LEADING
ZERO
BLANKING
V_DD ^INPUT
Q
÷2
CL
R
CL
÷5
Q
R
D _1/2 Q
DIGIT
CL
R
CARRY
OUTPUT
BP INPUT/OUTPUT
ENABLE
DETECTOR
2