MXL1544 Datasheet, PDF (12/20 Pages) Maxim Integrated Products – +5V Multiprotocol, Software-Selectable Control Transceivers

+5V Multiprotocol, Software-Selectable
Control Transceivers
DTE_TXD/DCE_RXD
DTE_SCTE/DCE_RXC
DTE_TXC/DCE_TXC
DTE_RXC/DCE_SCTE
DTE_RXD/DCE_TXD
C10
1µF
DTE_RTS/DCE_CTS
DTE_DTR/DCE_DSR
DTE_DCD/DCE_DCD
DTE_DSR/DCE_DTR
DTE_CTS/DCE_RTS
C6 C7 C8
100pF 100pF 100pF
VCC
5V
3
C3
4.7µF
1
C1
1µF
2
4
C4
1µF
5
6
7
8
9
10
28
27
CHARGE ²⁶
PUMP
25
24
D1
23
22
D2
21
D3
20
R1
19
18
R2
17
16
R3
15
11 _{M0 MXL1543}
12 _M1
NC ¹³ M2
14
DCE/DTE
C9
1µF
VCC
1 _VCC
2 _VDD
28
VEE
GND ²⁷
3
26
D1
25
4
D2
24
23
5
D3
6
22
R1
21
7
20
R2
19
18
8
R3
17
10
R4
16
9
D4
11 _{M0 MXL1544}
12
MAX3175
M1
NC ¹³ M2
14
15
DCE/DTE INVERT
3 8 11 12 13
C13
1µF
C2
1µF
C5
4.7µF
14
VCC
MXL1344A
21
LATCH
2
VEE
C12 5 4 6 7 9 10 16 15 18 17 19 20 22 23 24 1
1µF
VCC
2 ^DTE
14 ^{TXD A}
DCE
RXD A
24
11
TXD B
SCTE A
RXD B
RXC A
SCTE B RXC B
15
12
TXC A
TXC B
TXC A
TXC B
17
9
RXC A SCTE A
RXC B SCTE B
3 _{RXD A TXD A}
16
7
RXD B
SG
TXD B
1 _SHIELD
C11
1µF
CABLE WIRING FOR
MODE SELECTION
MODE
PIN 18 PIN 21
V.35
PIN 7 PIN 7
RS-449. V.36 N.C. PIN 7
RS-232
PIN 7 N.C.
CABLE WIRING FOR
DTE/DCE SELECTION
MODE PIN 25
DTE PIN 7
DCE N.C.
DB-25
CONNECTOR
25 _DCE/DTE
21 _M1
18 _M0
4 _{RTS A CTS A}
19 _{RTS B CTS B}
20
23
DTR A
DTR B
DSR A
DSR B
8
10
DCD A
DCD B
DCD A
DCD B
6
22
DSR A
DSR B
DTR A
DTR B
5
13
CTS A
CTS B
RTS A
RTS B
Figure 9. Cable-Selectable Multiprotocol DCE/DTE Port with DB-25 Connector
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