Datasheet

LTC2872
11
2872f
TesT circuiTs
Figure 1. RS485 Driver DC Characteristics Figure 2. RS485 Driver Output Short-Circuit Current
Figure 3. RS485 Receiver Input Current and Resistance (Note 5)
Figure 4. RS485 Driver Timing Measurement
2872 F01
DRIVER
DY
GND
OR
V
L
Y
R
L
R
L
Z
V
OD
+
–
V
OC
+
–
2872 F03
RECEIVER
A OR B
B OR A
V
IN
I
IN485
R
IN485
=
V
IN
I
IN485
+
–
2872 F04
DRIVER
DY
Y
Z
R
DIFF
C
L
C
L
t
PLHD485
t
SKEWD485
t
PLHD485
t
RD485
t
FD485
90%
0V
V
OD
½V
OD
V
L
0V
DY
Y, Z
Y - Z
10%
90%
0V
10%
2872 F02
DRIVER
Y OR Z
DY
GND
OR
V
L
Z OR Y
V
OUT
I
OZD485
, I
OSD485
+
–
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