MC145026 Ver la hoja de datos (PDF) - Freescale Semiconductor
Número de pieza
componentes Descripción
Fabricante
MC145026 Datasheet PDF : 20 Pages
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VDD
A1
5
A2
TRINARY
ADDRESSES
A3
A4
A5
D6
4–BIT
D7
BINARY
DATA
D8
D9
TE VDD
0.1 µF
14
1
16
15 Dout
2
3
4
5
6
MC145026
13 RTC
7
9
12 CTC
10
11
RS
8
0.1 µF
Din 9
VDD
16
1
VDD
A1
A2
6
2
A3
3
R1
MC145027 4
A4
7
OR
5
A5
C1
10
R2 C2
SC41343
15 D6
14 D7
13 D8
12 D9
11 VT
8
1
fosc = 2.3 RTCCTC′
R1C1 = 3.95 RTCCTC
R2C2 = 77 RTCCTC
CTC′ = CTC + Clayout + 12 pF
100 pF ≤ CTC ≤ 15 µF
RTC ≥ 10 kΩ; RS ≈ 2 RTC
R1 ≥ 10 kΩ
C1 ≥ 400 pF
R2 ≥ 100 kΩ
C2 ≥ 700 pF
REPEAT OF ABOVE
REPEAT OF ABOVE
Example R/C Values (All Resistors and Capacitors are ± 5%)
(CTC′ = CTC + 20 pF)
fosc (kHz) RTC
CTC′
RS
R1
C1
R2
C2
362
10 k
120 pF
20 k
10 k 470 pF 100 k 910 pF
181
10 k
240 pF
20 k
10 k 910 pF 100 k 1800 pF
88.7
10 k
490 pF
20 k
10 k 2000 pF 100 k 3900 pF
42.6
10 k
1020 pF
20 k
10 k 3900 pF 100 k 7500 pF
21.5
10 k
2020 pF
20 k
10 k 8200 pF 100 k 0.015 µF
8.53
10 k
5100 pF
20 k
10 k 0.02 µF 200 k 0.02 µF
1.71
50 k
5100 pF 100 k
50 k 0.02 µF 200 k 0.1 µF
Figure 17. Typical Application
5
TRINARY
ADDRESSES
MOTOROLA
MC145026•MC145027•MC145028•SC41343•SC41344
15
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