Datasheet

16
LTC2847
sn2847 2847fs
Figure 29. Controller-Selectable Multiprotocol DTE Port with DB-25 Connector
D2
D1
LTC2845
RTS
DTR
DSR
DCD
CTS
D3
R2
R1
R4
R3
LTC2847
LL
RI
TXD
SCTE
TXC
RXC
RXD
M0
M1
M2
DCE/DTE
V
CC
V
DD
V
EE
GND
2
14
24
11
15
12
17
9
3
1
4
19
20
8
23
10
6
22
5
13
18
*
7
16
C2
1µF
C1
1µF
C3
1µF
C4
3.3µF
2847 F29
SCTE B
RTS A (105)
RTS B
DTR A (108)
DTR B
CTS A (106)
CTS B
LL (141)
RI (125)
SG
SHIELD
DB-25 MALE
CONNECTOR
DCD A (109)
DCD B
DSR A (107)
DSR B
D4
V
CC
5V
CHARGE
PUMP
+
V
IN
D4ENB
R4EN
V
IN
3.3V
V
IN
3.3V
C9
1µF
C7
1µF
C8
1µF
M0
M1
M2
DCE/DTE
M0
M1
M2
D1
D2
D3
R1
R2
R3
TXD A (103)
TXD B
TXC A (114)
RXC A (115)
RXD A (104)
TXC B
RXC B
RXD B
SCTE A (113)
R5
D5
C5
1µF
C6
1µF
T
T
T
T
T
C10
1µF
NC
TM
RL
TM (142)
RL (140)
25
21
*OPTIONAL
TYPICAL APPLICATIO S
U