LTC2870_15 Datasheet, PDF (34/42 Pages) Linear Technology – RS232/RS485 Multiprotocol Transceivers with Integrated Termination

LTC2870/LTC2871
typical Applications
Logic input pins not shown are tied to a valid logic state. External Components not shown.
PORT 1
LOGIC
INTERFACE
DIN1
LTC2871
DOUT1
ROUT1
RIN1
PORT 1
LINE
INTERFACE
PORT 1
LOGIC
INTERFACE
DIN1
LTC2871
DOUT1
ROUT1
RIN1
PORT 1
LINE
INTERFACE
PORT 2A/2B
LOGIC
INTERFACE
SELECT LINE 2A
SELECT LINE 2B
DIN2
ROUT2
CH2
DOUT2
RIN2
PORT 2A
LINE
INTERFACE
CH2
DIN2
LTC2871
DOUT2
ROUT2
RIN2
PORT 2B
LINE
INTERFACE
PORT 2A
LOGIC
INTERFACE
SELECT LINE 2A
SELECT LINE 2B
PORT 2B
LOGIC
INTERFACE
DIN2
ROUT2
CH2
DOUT2
RIN2
CH2
DIN2
LTC2871
DOUT2
ROUT2
RIN2
PORT 2A/2B
LINE
INTERFACE
PORT 3
LOGIC
INTERFACE
DIN1
ROUT1
DOUT1
RIN1
PORT 3
LINE
INTERFACE
PORT 3
LOGIC
INTERFACE
DIN1
ROUT1
DOUT1
RIN1
PORT 3
LINE
INTERFACE
28701 F44
Figure 47. RS232 Triple Transceiver
with Selectable Line Interface
28701 F45
Figure 48. RS232 Triple Transceiver
with Selectable Logic Interface
34
SELECT
H/F
INPUT2 INPUT1
LTC2870/
LTC2871
RS485
Y
INTERFACE
Z
RA,
RO
A
B
28701 F46
Figure 49. RS485 Receiver with Multiplexed Inputs
INPUT1
INPUT2
For more information www.linear.com/LTC2870
28701fa