Datasheet

9
LTC1343
APPLICATIONS INFORMATION
WUU
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software-selectable cable termination chip or by using
existing discrete designs.
A complete DCE-to-DTE interface operating in EIA-530
mode is shown in Figure 10. The first LTC1343 of each port
is used to generate the clock and data signals along with
LL (Local Loop-back) and TM (Test Mode). The second
LTC1343 is used to generate the control signals along with
Figure 10. Complete Multiprotocol Interface in EIA-530 Mode
Overview
The LTC1343 is a 4-driver/4-receiver multiprotocol trans-
ceiver that operates from a single 5V supply. Two LTC1343s
form the core of a complete software-selectable DTE or
DCE interface port that supports the RS232, RS449,
EIA-530, EIA-530-A, V.35, V.36 or X.21 protocols. Cable
termination may be implemented using the LTC1344
LTC1343
DCEDTE
LTC1343LTC1344 LTC1344
1343 F10
D1
D4
D4
D3
D2
R1
R4
103
103
103
103
103
R3
LTC1343
D1
D4
D3
D2
R1
R4
R2
R3
LL
TXD
SCTE
TXC
RXC
RXD
TM
LL
TXD
SCTE
TXC
RXC
RXD
TM
SERIAL
CONTROLLER
R3
R2
R1
R4
D3
D2
D1
LTC1343
D4
R3
R2
R1
R4
D3
D2
D1
LL
TXD
SCTE
TXC
RXC
RXD
TM
RL
RTS
DTR
DCD
DSR
CTS
RI
RL
RTS
DTR
DCD
DSR
CTS
RI
RL
RTS
DTR
DCD
DSR
CTS
RI
SERIAL
CONTROLLER
R2