Datasheet

MAX13487E/MAX13488E
Half-Duplex RS-485-/RS-422-Compatible
Transceiver with AutoDirection Control
8 _______________________________________________________________________________________
V
OD
C
L
R
DIFF
2
R
DIFF
2
V
OC
A
B
Figure 1. Driver DC Test Load
A
B
DI
R
L
V
ID
R
L
V
CC
GND
C
L
Figure 2. Driver-Timing Test Circuit
1.5V
1.5V
0
DI
B
A
t
DPLH
t
DPHL
1/2 V
O
1/2 V
O
V
O
t
DDD
, t
RED
RO
(RO PULLED LOW)
10%
90%
10%
90%
0
V
O
O
-V
O
V
DIFF
V
DIFF
= V(A) - V(B)
t
HL
t
LH
f = 1MHz, t
LH
≤ 3ns, t
HL
≤ 3ns
V
CC
RE = V
CC
Figure 3. Driver Propagation Delays
Test Circuits and Waveforms