Datasheet

MAX3440E–MAX3444E
±15kV ESD-Protected, ±60V Fault-Protected,
10Mbps, Fail-Safe RS-485/J1708 Transceivers
8 _______________________________________________________________________________________
50Ω
GENERATOR
(NOTE 4)
C
L
= 20pF
(NOTE 5)
V
ID
R
R
O
t
RPLH
1.0V
RO
1.0V
0
(A–B)
1.0V
2.0V
0
t
RPHL
V
CC
V
OM
V
OM
0
A
B
A, B
DE
V
CC
3V
0
V
CC
V
OL
V
OM
t
PDLS
1.5V
0.25V
1.5V
t
PDLZ
50Ω
GENERATOR
(NOTE 4)
D0 OR 3V
A, B
S1
C
L
= 50pF
(NOTE 5)
R
L
= 500Ω
DI
DE
A
B
t
PDZL
Figure 6. Driver Enable and Disable Times
Figure 7. Receiver Propagation Delay
Test Circuits and Waveforms (continued)
50Ω
GENERATOR
(NOTE 4)
≈ 1.5V
V
OH
+ V
OL
2
V
OM
=
3V
0
V
OH
V
OM
0
D0 OR 3V
t
PDHS
t
PDHZ
1.5V
0.25V
A, B
A, B
S1
DE
1.5V
C
L
= 50pF
(NOTE 5)
R
L
= 500Ω
DI
A
B
DE
t
PDZH
Figure 5. Driver Enable and Disable Times