mc145028 Freescale Semiconductor, Inc, mc145028 Datasheet - Page 17

• Manufacturer Part Number: mc145028
• Description: Mc145027 Encoder And Decoder Pair
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
ADDRESSES
R
R
f
osc
1
2
C
C
TRINARY
BINARY
1
2
=
= 3.95 R
= 77 R
4-BIT
DATA
2.3 R
5
TC
TC
V
1
TC
C
DD
C
TC
C
TC
TC
′
(C
A1
A2
A3
A4
A5
D6
D7
D8
D9
f
TC
osc
′ = C
88.7
42.6
21.5
8.53
1.71
362
181
(kHz)
C
TC
10
1
2
3
4
5
6
7
9
TC
Example R/C Values (All Resistors and Capacitors are ± 5%)
+ 20 pF)
MC145026, MC145027, MC145028 Technical Data, Rev. 4
′ = C
TE
100 pF ≤ C
14
MC145026
R
R
C
R
C
10 k
10 k
10 k
10 k
10 k
10 k
50 k
TC
1
1
2
2
R
TC
≥ 10 kΩ
≥ 400 pF
≥ 100 kΩ
≥ 700 pF
TC
≥ 10 kΩ; R
V
8
+ C
DD
16
layout
TC
1020 pF
2020 pF
5100 pF
5100 pF
120 pF
240 pF
490 pF
Figure 18. Typical Application
C
15
13
12
11
≤ 15 µF
TC′
+ 12 pF
S
0.1 µF
D
R
R
≈ 2 R
out
TC
S
C
TC
TC
100 k
20 k
20 k
20 k
20 k
20 k
20 k
R
S
10 k
10 k
10 k
10 k
10 k
10 k
50 k
R
R2
1
D
in
C
0.1 µF
R1
C
2
2000 pF
3900 pF
8200 pF
0.02 µF
0.02 µF
10
470 pF
910 pF
1
C
9
6
7
REPEAT OF ABOVE
REPEAT OF ABOVE
1
MC145027
V
DD
100 k
100 k
100 k
100 k
100 k
200 k
200 k
16
R
8
2
MC145027 and MC145028 Timing
15
14
13
12
11
1
2
3
4
5
0.015 µF
1800 pF
3900 pF
7500 pF
0.02 µF
910 pF
0.1 µF
D6
D7
D8
D9
C
VT
2
A1
A2
A3
A4
A5
V
DD
5
TRINARY
ADDRESSES
17