ICM7216A Datasheet, PDF (15/17 Pages) Intersil Corporation – 8-Digit, Multi-Function, Frequency Counters/Timers

ICM7216A, ICM7216B, ICM7216D
INPUT A
J3
1 CL
K2
P
4
1_/274LS112
C
15
V+
Q6
Q5
K 12
10
P
Q7
13 CL
1_/274LS112
J 11
C
14
Q9
3kΩ
10kΩ
100pF
V_DD
HOLD
100kΩ
V_DD
V_DD
EXT
OSC DISPLAY DISPLAY
ENABLE OFF TEST
39pF
39pF
D1
D2
D3
D4
D5
D6
0.1µF
D7
D8
RESET
8
LED
OVERFLOW
INDICATOR
1
2
3
4
5
6
7
ICM7216D
8
9
10
11
12
13
14
a
b
c
d
e
f
g
DP
D8 D8
D7
28
22MΩ
27
2.5MHz
26
CRYSTAL
25
24
DP
23
8
22
g
21
e
20
a
19
d
18
V_DD
17
b
16
c
15
f
10kΩ
RANGE
D1
D2
COMMON CATHODE LED DISPLAY
D3
D4
D1
D4
IN914s
D8
3
EXT
OSC
INPUT
4
a
b
c
d
e
f
g
DP
D6
D5
D4
D3
D2
D1 ₈
OVERFLOW
INDICATOR
FIGURE 19. 40MHz FREQUENCY COUNTER
9-24