3.3V-Powered, ±15kV ESD-Protected, 12Mbps and
Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3483E/MAX3485E/MAX3486E/MAX3488E/MAX3490E/MAX3491E
3.0V
GENERATOR
(NOTE 4)
V
ID
50Ω
R
OUT
IN
C
L
= 15pF
(NOTE 5)
t
RPLH
t
RPHL
V
CC
1.5V
0
V
CC
V
OM
=
2
OUT
V
OM
V
OM
0
1.5V
1.5V
0
Figure 11. Receiver Propagation Delay
1.5V
-1.5V
S3
1k
V
ID
R
S1
V
CC
S2
C
L
(NOTE 5)
GENERATOR
(NOTE 4)
50Ω
3V
IN
t
PRZH
t
PRSH
V
OH
OUT
1.5V
0
OUT
1.5V
1.5V
0
S1 OPEN
S2 CLOSED
S3 = 1.5V
IN
t
PRZL
t
PRSL
1.5V
3V
S1 CLOSED
S2 OPEN
S3 = -1.5V
0
V
CC
V
OL
3V
IN
1.5V
0
t
PRHZ
OUT 0.25V
V
OH
OUT
0
0.25V
S1 OPEN
S2 CLOSED
S3 = 1.5V
IN
1.5V
3V
S1 CLOSED
S2 OPEN
S3 = -1.5V
0
t
PRLZ
V
CC
V
OL
Figure 12. Receiver Enable and Disable Times
Note 4:
The input pulse is supplied by a generator with the following characteristics: f = 250kHz, 50% duty cycle, t
r
≤
6.0ns, Z
O
= 50Ω.
Note 5:
C
L
includes probe and stray capacitance.
10
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