ltc2844 Linear Technology Corporation, ltc2844 Datasheet - Page 17

• Manufacturer Part Number: ltc2844
• Description: 3.3v Software-selectable Multiprotocol Transceiver
• Manufacturer: Linear Technology Corporation

TYPICAL APPLICATIO S
DCE/DTE
M0
M1
M2
DTE_SCTE/DCE_RXC
DTE_RXC/DCE_SCTE
DTE_DCD/DCE_DCD
DTE_TXD/DCE_RXD
DTE_RXD/DCE_TXD
DTE_DTR/DCE_DSR
DTE_DSR/DCE_DTR
DTE_RTS/DCE_CTS
DTE_CTS/DCE_RTS
DTE_TXC/DCE_TXC
Figure 24. Controller-Selectable Multiprotocol DTE/DCE Port with DB-25 Connector
3.3V
DTE_LL/DCE_LL
V
IN
1 F
C7
C6
10 F
V
5V
CC
U
C3
1 F
1 F
C1
C8
1 F
SHDN
10
11
12
13
14
15
16
18
19
10
11
12
13
14
4
7
5
6
8
9
1
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
D3
D1
D2
CHARGE
LTC2846
LTC2844
D1
D2
D3
D4
BOOST
PUMP
5.6 H
R1
R2
R3
R1
R2
R3
R4
L1
GND
T
T
T
T
T
V
V
EE
IN
36
27
17 V
25
24
23
22
21
20
19
18
17
16
15
35
33
32
31
30
29
28
26
25
24
23
22
21
20
28
27
26
3.3V
IN
MBR0520
+
D1
C2
1 F
C4
3.3 F
C10
1 F
V
3.3V
IN
C9
1 F
R1
13k
R2
4.3k
C5
10 F
V
5V
CC
14
24
11
15
12
17
16
10
22
13
18
19
20
23
2
9
3
7
1
4
8
6
5
SG
SHIELD
RTS A
RTS B
DTR A
DTR B
DCD A
DCD B
DSR A
DSR B
CTS A
CTS B
LL A
LTC2844
TXD A
TXD B
SCTE A
TXC A
TXC B
RXC A
RXC B
RXD A
RXD B
SCTE B
DTE
CONNECTOR
DB-25
TXC A
TXC B
SCTE A
SCTE B
TXD A
TXD B
DCD A
DCD B
DTR A
DTR B
RTS A
RTS B
LL A
RXD A
RXD B
RXC A
RXC B
CTS A
CTS B
DSR A
DSR B
sn2844 2844fs
DCE
2844 F25
17