Datasheet

LTC2870/LTC2871
24
28701f
TYPICAL APPLICATIONS
Figure 20. LTC2870 in
RS232 Mode
Figure 21. LTC2870 in RS232
Mode with Loopback
Figure 22. LTC2870 in RS485
Mode, Terminated
Figure 23. LTC2870 in RS485
Mode in Loopback
Figure 24. LTC2870 in RS485
Mode Half-Duplex
Figure 25. LTC2870 in RS485
Mode, Half-Duplex, with
Loopback and Terminated
28701 F20
DXEN
V
L
LB
485/232
RXEN
DY
RB
GND
DZ
RA
Y
B
Z
A
LTC2870
28701 F21
485/232
RXEN
DY
RB
GND
DZ
RA
Y
B
Z
A
LTC2870
DXEN
LB
V
L
28701 F23
DXEN
V
L
RXEN
H/F
TE485
485/232
LB
DY
GND
RA
Y
B
Z
A
LTC2870
28701 F22
DXEN
V
L
RXEN
H/F
LB
485/232
TE485
DY
GND
RA
120
Y
B
Z
A
LTC2870
120
28701 F24
DXEN
V
L
RXEN
TE485
LB
485/232
H/F
DY
GND
RA
Y
Z
LTC2870
28701 F25
DXEN
485/232
H/F
LB
TE485
V
L
RXEN
DY
120Ω
120Ω
GND
RA
Y
B
Z
A
LTC2870
V
CC
= 3V to 5.5V, V
L
= 1.7V to V
CC
. Logic input pins not shown are tied to a valid logic state.