ICM7224 Intersil Corporation, ICM7224 Datasheet - Page 7

• Manufacturer Part Number: ICM7224
• Description: 41/2 Digit LCD Display Counter
• Manufacturer: Intersil Corporation

V
DD
LEADING ZERO BLANKING
SWITCH CLOSED INHIBITS
10kΩ
+
3V - 6V
C
OUT
HIGH ORDER DIGITS
-
SLAVE BACKPLANE
1 OVERFLOW
ICM7224
C
IN
1
2
3
4
5
6
7
ICM7207A
6 SEG
FIGURE 8. EIGHT-DIGIT PRECISION FREQUENCY COUNTER
14
13
12
11
10
9
8
15 SEG
HIGH ORDER DIGITS
CRYSTAL
C
C
f
R
C
C
O
IN
OUT
S
S
P
SWITCH OPEN
1
SWITCH CLOSED
0.1
= 5.24288MHz
s
< 75Ω
= 0.015pF
= 3.5pF
= 22pF
GATING
s
= 22pF
GATING
ICM7224
3 SEG
4 SEG
7
6 SEG
MASTER BACKPLANE
LOW ORDER DIGITS
1
1 BACKPLANE
/
4
LOW ORDER DIGITS
ICM7224
CD4069C
15 SEG
LEVEL SHIFTING)
CONDITIONING
(PRESCALER
SIGNAL
INPUT
8-DIGIT LCD DISPLAY
WITH OVERFLOW
4 SEG
INPUT SIGNAL
3 SEG