16
LT1739
1739fas, sn1739
2
12
9
19
1739 SD
+
–
+
–
+
–
+
–
+
–
+
–
20
10
11
1
VDD
VEE
ON/OFF
ON
1
2
3
JP3
GND
OUT
IN
LT1121CST-5
SOT233
C2
1
F
25V
3216
C3
1
F
25V
3216
+
C5
10
F
35V
7343
+
C7
1
F
25V
3216
C4
0.1
F
25V
0603
C6
0.1
F
C1
0.1
F
C9
0.1
F
C13
0.1
F
C14
0.1
F
C11
1
F
25V
3216
C10
0.1
F
+
5V
VDD
VCC
VEE
E1
VCC
E3
GND
E4
LINE (+)
E2
DRV (+)
E8
DRV (–)
E10
ON/OFF
E11
VC0NTROL
E7
RCVIN (+)
E13
RCVIN (–)
E12
RCV (–)
E9
RCV (+)
E5
LINE (–)
E6
VEE
PLACE C4 AND C5
AS CLOSE TO
U2 AS POSSIBLE
U1
C8
0.1
F
100V
C12
0.1
F
100V
1
2
3
4
5
6
7
8
10
COILCRAFT
X8504-A
U3A
LT1361CS8
U3B
LT1361CS8
U4A
LT1541CS8
U4B
LT1541CS8
14
17
18
R2
10k
R13
10k
R18
10k
R22
10k
R21
10k
R23
OPT
R25
107
R24
107
R5
OPT
C15
OPT
R15
OPT
R26
OPT
C17
OPT
C16
1000pF
C18
OPT
1206
JP6
JP5
JP4
JP2
R3
1k
R6
2.49k
R4
2.49k
R7
1k
U2A
LT1739CFE
U2B
LT1739CFE
VBIAS
ADJ
FIXED
Q1
FMMT3904
R17
21.5k
R8
15.4
1/2W
2010
R11
1.6k
R14
1.6k
R10
1k
R19
1k
R16
1k
R12
1k
R20
9.31k
13
R1
15.4
1/2W
2010
JP1
R9
10k
Figure 17. LT1739, LT1361 ADSL Demo Board (DC306A-C)
APPLICATIO S I FOR ATIO
WU
UU