LTC2846 Linear Technology, LTC2846 Datasheet - Page 22

• Manufacturer Part Number: LTC2846
• Description: 3.3V Software-Selectable Multiprotocol Transceiver with Termination
• Manufacturer: Linear Technology

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LTC2846
TYPICAL APPLICATIO S
22
4
DCE/DTE
M0
M1
M2
Figure 34. Controller-Selectable Multiprotocol DTE/DCE Port with RL, LL, TM and DB-25 Connector
DTE_SCTE/DCE_RXC
DTE_RXC/DCE_SCTE
DTE_TXD/DCE_RXD
DTE_DTR/DCE_DSR
DTE_DCD/DCE_DCD
DTE_DSR/DCE_DTR
DTE_RXD/DCE_TXD
DTE_TXC/DCE_TXC
DTE_RTS/DCE_CTS
DTE_CTS/DCE_RTS
3.3V
DTE_TM/DCE_RL
DTE_RL/DCE_TM
V
DTE_LL/DCE_RI
DTE_RI/DCE_LL
IN
1 F
C7
C6
10 F
V
5V
CC
U
V
5V
CC
C3
1 F
1 F
C1
C8
1 F
SHDN
1, 19
10
11
12
13
14
15
16
18
19
10
17
18
11
12
13
14
4
7
5
6
8
9
2
3
4
5
6
7
8
9
V
V
M0
M1
M2
DCE/DTE
M0
M1
M2
DCE/DTE
3
CC
DD
REGULATOR
SWITCHING
D1
D2
D3
LTC2846
LTC2845
CHARGE
D1
D2
D3
D4
D5
BOOST
PUMP
5.6 H
R1
R2
R3
R1
R2
R3
R4
L1
D4ENB
R4EN
R5
GND
T
T
T
T
T
V
V
EE
IN
36
35
33
32
31
30
29
28
27
26
25
24
23
22
21
20
17 V
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
15
16
3.3V
IN
MBR0520
NC
+
D1
C2
1 F
C4
3.3 F
C10
1 F
C9
1 F
V
3.3V
R1
13k
R2
4.3k
IN
C5
10 F
V
5V
CC
*OPTIONAL
14
24
12
16
10
22
13
11
15
17
19
20
18
23
25
21
2
9
1
4
8
6
5
3
7
*
RXC A
RXC B
RXD A
RXD B
SG
SHIELD
RTS A
RTS B
DTR A
DTR B
DCD A
DCD B
DSR A
DSR B
CTS A
CTS B
TXD A
TXD B
SCTE A
SCTE B
TXC A
TXC B
LL
RI
TM
RL
DTE
CONNECTOR
DB-25
sn2846 2846fs
DCE
RXD A
RXD B
RXC A
RXC B
TXC A
TXC B
SCTE A
SCTE B
TXD A
TXD B
CTS A
CTS B
DSR A
DSR B
DCD A
DCD B
DTR A
DTR B
RTS A
RTS B
RI
LL
RL
TM
2846 F34