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MAX13487E_15 Datasheet, PDF (8/17 Pages) Maxim Integrated Products – Half-Duplex RS-485-/RS-422-Compatible Transceiver with AutoDirection Control
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MAX13487E/MAX13488E
Test Circuits and Waveforms
A
VOD
B
RDIFF
2
CL
RDIFF
2
VOC
Figure 1. Driver DC Test Load
Half-Duplex RS-485-/RS-422-
Compatible Transceiver with
AutoDirection Control
DI
A
VID
B
RL
VCC
GND
CL
RL
Figure 2. Driver-Timing Test Circuit
VCC
DI
0
B
VO
A
1/2 VO
RE = VCC f = 1MHz, tLH ≤ 3ns, tHL ≤ 3ns
1.5V
1.5V
tDPLH
tDPHL
RO
tDDD, tRED
O
VO
VDIFF 0
-VO
(RO PULLED LOW)
90%
10%
tLH
VDIFF = V(A) - V(B)
tHL
Figure 3. Driver Propagation Delays
1/2 VO
90%
10%
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