ICM7226 Intersil Corporation, ICM7226 Datasheet - Page 13

• Manufacturer Part Number: ICM7226
• Description: 8-Digit Multi-Function Frequency Counter/Timer
• Manufacturer: Intersil Corporation

Test Circuit
6
FUNCTION
V
DD
D2
D5
GENERATOR
GENERATOR
MEAS IN PROGRESS
FUNCTION
FUNCTION
OVERFLOW
D8
D4
INDICATOR
= 5.0V
D1
D3
RESET
10K
LED
BCD B
BCD A
STORE
INPUT B
BCD C
BCD D
DP
g
d
b
e
a
c
f
8
a
b
c
d
e
f
g
DP
39pF
10
11
12
13
14
15
16
17
18
19
20
D8
1
2
3
4
5
6
7
8
9
INPUT A
NOTE: Overflow will be indicated on the decimal point output of digit 7.
ICM7226A
ICM7226B
D8
ICM7226A
CONTROL INPUT
DEVICE
D7
ICM7226A, ICM7226B
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
EXT OSC IN
D6
RST OUT
EXT RANGE
D2
D3
D4
D5
D6
D7
D8
D1
V
FIGURE 19.
CATHODE
SS
BUF OSC OUT
V
V
V
HOLD
10k
DD
DD
DD
9-27
100k
100k
DP
D8
D5
GENERATOR
FUNCTION
30pF
V
DD
D4
22M
D1
D8
V
DD
V
D2
D7
DD
D1
D5
D3
D6
D2
D4
10MHz
CRYSTAL
D3
39pF
D4
D5
ANODE
D3
D8
DP
DISPLAY
OFF
D4
D2
DISPLAY
TEST
D8
8
5
8
1MHz
D1
D2
6
8
OSC
CRYSTAL SPECS. =
F
C
R
EXT
O
O
S
6
D1
1N914s
10.00MHz
22pF
35
DENOTES BU
WITH 6
CONDUCTORS
EXT
DP
D3
TEST
D5