LTC1343 Linear Technology, LTC1343 Datasheet - Page 9

• Manufacturer Part Number: LTC1343
• Description: Software-Selectable Multiprotocol Transceiver
• Manufacturer: Linear Technology

APPLICATIONS
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
CONTROLLER
SERIAL
SCTE
DCD
DSR
RXD
DTR
RXC
RTS
CTS
TXD
TXC
TM
RL
LL
RI
U
INFORMATION
U
LTC1343
LTC1343
Figure 10. Complete Multiprotocol Interface in EIA-530 Mode
DTE
D1
D2
D3
D4
D1
D2
D3
D4
R1
R2
R3
R1
R2
R3
R4
R4
W
LTC1344
U
103
103
103
SCTE
RXD
TXD
TXC
RXC
TM
RTS
DTR
DCD
DSR
CTS
LL
RL
RI
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
LTC1344
103
103
LTC1343
LTC1343
DCE
R4
R3
R2
R1
R4
R3
R2
R1
D4
D3
D2
D1
D4
D3
D2
D1
TXD
SCTE
TXC
RXC
RXD
TM
RL
RTS
DTR
DCD
DSR
CTS
RI
LL
CONTROLLER
SERIAL
LTC1343
1343 F10
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