參數(shù)資料
型號: SI2439-A-GM
廠商: Silicon Laboratories Inc
文件頁數(shù): 4/70頁
文件大?。?/td> 0K
描述: IC ISOMODEM 33.6KBPS 38-QFN
標(biāo)準(zhǔn)包裝: 364
系列: *
Si2494/39
12
Rev. 1.0
2. Typical Application Schematic
Bias
Ring
Detect/CID/Voltage
monitoring
Hookswitch
Add
0.020
to
0.030
sq.
inches
of
Cu
at
all
transistor
collectors
Place
C3
near
D1
N
o
Gr
o
und
Pl
a
n
e
I
n
D
AA
Se
c
ti
o
n
DC
Term.
Hookswitch
Emissios
Option
CTSb
RESETb
CLKOU
T
ESC
EECS
DCDb
EECLK
FSY
N
CH
RIb
SDI
SDO
IN
Tb
AOU
T
EESDI
EESDO
RXD
TXD
RTSb
AOU
T
b
TIP
RIN
G
I_GN
D
I_GN
D
I_GN
D
I_GN
D
VDD
C50C50
C10C10
R12
56.
2
R12
56.
2
C52C52
Q1Q1
RV1RV1
Q3Q3
Q5Q5
R2R2
FB1FB1
C2
33pF
C2
33pF
C6C6
C5C5
R4R4
Q2Q2
-
+
D1
HD
0
4
-
+
D1
HD
0
4
C8C8
R6R6
C9C9
C1
33pF
C1
33pF
R11R11
FB2FB2
C51C51
C7C7
R13
56.
2
R13
56.
2
R15R15
+
C4
+
C4
R7R7
Z1Z1
U1
Si
2493
U1
Si
2493
GP
IO
1
NC1
4
F
S
Y
NCH_
2
CL
K
O
UT
3
VDD
5
GND
6
VR
EG
7
SD
I
8
RIb
19
UA
RT
_
C
T
S
_
/S
P
I_
S
CL
K
/CS
_
21
EEC
L
K
13
AO
U
T
b
14
UA
RT
_
R
X
D
/S
P
I_
M
IS
O
/RD_
22
UA
RT
_
T
X
D
/S
P
I_
M
O
S
I/W
R_
23
U
A
R
T
_R
T
S
_/
S
P
I_C
S
_
/D
7
24
EESD
O
11
SD
O
9
EESD
I
10
EEC
S
12
C2
A
17
C1
A
18
AO
U
T
15
R
ESET
_
16
G
P
IO
1
8
/D0
34
INT
_
35
C
L
KIN
/XT
AL
I
36
XT
AL
O
37
NC3
38
NC2
27
GND
25
VDD
26
EC
/D
5
29
G
P
IO
2
5
/D3
31
G
P
IO
1
6
/D2
32
DCD_
/D6
28
G
P
IO
2
4
/D4
30
G
P
IO
1
7
/D1
33
G
P
IO
1
/A0
20
R8R8
Q4Q4
R3R3
Y1Y1
C3C3
C41C41
C40C40
R9R9
R5R5
R10R10
U2
Si
3018
U2
Si
3018
QE
1
DCT
2
RX
3
IB
4
C1
B
5
C2
B
6
VR
EG
7
RNG
1
8
DCT
2
16
IGND
15
DCT
3
14
QB
13
QE
2
12
SC
11
VR
EG
2
10
RNG
2
9
R16R16
R1R1
Figure
6
.
T
y
p
ical
Si2
494/39
Schemati
c
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