LTC1387 Linear Technology, LTC1387 Datasheet - Page 11

• Manufacturer Part Number: LTC1387
• Description: Single 5V RS232/RS485 Multiprotocol Transceiver
• Manufacturer: Linear Technology

A
PPLICATI
INTERFACE
INTERFACE
INTERFACE
A
B
RS232
RS232
RXD
TXD
A
B
Y
Z
A
B
Y
Z
O
RS232
RS232
RS232
RS232
RXD
TXD
RTS
RS232
RS232
CTS
RS485
RS485
RXD
TXD
U
Figure 16. Full-Duplex RS232 (2-Channel), Full-Duplex RS485/RS422 with SLEW Control
S
RS485
RS485
RS485
RS485
RS485
RS485
RS485
RS485
I FOR ATIO
A
B
Y
Z
U
Figure 15. Full-Duplex RS232 (1-Channel), Full-Duplex RS485/RS422
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
A
B
Y
Z
D
D
Figure 14. Full-Duplex RS232 (1-Channel), Half-Duplex RS485
LTC1387
A
B
Y
Z
Y
Z
D
D
LTC1387
W
D
Y
D
Z
LTC1387
R
R
Y
Z
A
B
R
R
R
R
D
D
ON
RXEN
DXEN
485/232
R
R
A
B
A
B
Y
Z
A
B
/SLEW
R
R
D
D
ON
RXEN
DXEN
485/232
U
R
R
D
D
ON
RXEN
DXEN
485/232
A
B
Y
Z
/SLEW
A
B
Y
Z
V
/SLEW
CC
V
RX
CONTROLLER
DX
RXEN
DXEN
MODE
CC
RX1
RX2
CONTROLLER
DX1
DX2/SLEW
ON
RXEN
DXEN
MODE
RX
CONTROLLER
DX
RXEN
DXEN
MODE
MODE = 0
RXEN = 1
DXEN = 0
MODE
RS232
MODE = 0
RXEN = 1
DXEN = 1
MODE = 0
RXEN = 1
DXEN = 1
MODE
RS232
ON = 1
MODE
RS232
TRANSMIT MODE
MODE = 1
RXEN = 0
DXEN = 1
RS485
MODE = 1
RXEN = 1
DXEN = 1
MODE = 1
RXEN = 1
DXEN = 1
MODE
RS485
ON = 1
MODE
RS485
RECEIVE MODE
MODE = 1
RXEN = 1
DXEN = 0
RS485
SHUTDOWN
MODE = X
RXEN = 0
DXEN = 0
SHUTDOWN
MODE = X
RXEN = 0
DXEN = 0
MODE
ON = 0
MODE
LTC1387
1387 • F15
SHUTDOWN
1387 • F16
MODE = 0
RXEN = 0
DXEN = 0
MODE
11
1387 • F14