ICM7226A_01 Datasheet, PDF (17/19 Pages) Intersil Corporation – 8-Digit, Multi-Function, Frequency Counter/Timer

ICM7226A, ICM7226B
INPUT
V_DD
M1
CP ^ECL11C90 QTTL
CE
MS
39pF
V_DD
10kΩ
V_DD
3kΩ
V_DD
FUNCTION
SWITCH
OPEN FREQ
CLOSED
PERIOD
V_DD
F
D1 IN
OUT
CONT 2
CD4016
D8 IN
CONT 2
OUT
0.1µF
N.O.
RESET
INPUT
1
2
10kΩ ³
4
5
6
7
D1
8
D3
9
D2
10
D4
11
12
D5
13
D6
14
D7
15
D8
16
17
18
19
20
ICM7226B
8
2
D8
D7
D6
DISPLAY DISPLAY
OFF TEST
V_DD
10kΩ
2N2222
10kΩ
D4
D8
D1
40
100kΩ HOLD
1N914s
39
V_DD
38
37
V_DD
3
36
35
10MHz
CRYSTAL
34
V_DD
33
22MΩ
32
39pF
39pF
(TYP)
31
30 DP
V_DD
V_DD
29
g
28
e
a
27
26
d
25
V_DD
24
b
8
23
c
4
D1
22
f _10kΩ
D2
21
D3
D4
a
b
c
d
e
f
g
DP
D5
D4
D3
D2
D1
D8
OVERFLOW
FIGURE 23. 100MHz FREQUENCY, PERIOD COUNTER
17