MC145442B 查看數據表（PDF） - Motorola => Freescale
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MC145442B Datasheet PDF : 12 Pages
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0.1 µF
6
DTMF
INPUT
RDSI
20 kΩ
VDD
20
CDSI
TLA
RTLA 1
0.1 µF
17
15
DSI
TxA
RxA2
9
Xin
8
Xout
CD
3.58
MHz
10 Ω
TIP
RTx
10
µF
600
+
Ω
16 RxA1
TxD
RxD
10 kΩ
RING
*
VDD
0.1 µF
MC145442B/3B
SQT
CFB
18 Exl
10
FB
0.1 µF 19 VAG
LB
MODE
10 kΩ
10 kΩ
CDT GND CDA
0.1 µF
4 12
CCDT
0.1 µF
7
CCDA
0.1 µF
0.1 µF
+5 V
0.1 µF
17
19
1
VDD
C1+
3
C1–
11 DI2
VCC
EIA–232–D
20
DB–25
C1+
CONNECTOR
18
C1–
MMBZ15VDLT1 X 3 8
15 DO1
Tx2 10
2
13 DI1
Rx1 6
MC145407
3
TxEN
8
Tx1
STBY
Rx2 7
7
Rx3 9
GND
VSS
2
4
* Line Protection Circuit.
Figure 7. Typical MC145442B/MC145443B Applications Circuit
MC145442B•MC145443B
10
MOTOROLA
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