Datasheet

±15kV ESD-Protected, Slew-Rate-Limited,
Low-Power, RS-485/RS-422 Transceivers
SWITCHING CHARACTERISTICS—MAX481E/MAX485E, MAX490E/MAX491E, MAX1487E
(V
CC
= 5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Notes 1, 2)
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Notes 1, 2)
mA
7950V ≤ V
O
≤ V
CC
I
OSR
Receiver Short-Circuit Current
mA35 250-7V ≤ V
O
≤12V (Note 4)I
OSD2
Driver Short-Circuit Current,
V
O
= Low
mA35 250-7V ≤ V
O
≤12V (Note 4)I
OSD1
Driver Short-Circuit Current,
V
O
= High
MAX1487E,
–
R
—
E
–
= 0V or V
CC
250 400
350 650
CONDITIONS UNITSMIN TYP MAXSYMBOLPARAMETER
230 400
300 500
MAX481E/MAX485E,
–
R
—
E
–
= 0V or V
CC
500 900
MAX490E/MAX491E,
DE, DI,
–
R
—
E
–
= 0V or V
CC
300 500
MAX488E/MAX489E,
DE, DI,
–
R
—
E
–
= 0V or V
CC
120 250
DE = V
CC
300 500DE = 0V
DE = V
CC
DE = 0V
µAMAX481E/483E/487E, DE = 0V,
–
R
—
E
–
= V
CC
0.5 10I
SHDN
Supply Current in Shutdown
120 250
I
CC
No-Load Supply Current
(Note 3)
DE = V
CC
DE = 0V
MAX483E
MAX487E
MAX483E/MAX487E,
–
R
—
E
–
= 0V or V
CC
µA
52025MAX490EC/E, MAX491EC/E
MAX481E, MAX485E, MAX1487E
Driver Rise or Fall Time t
R
, t
F
32040
Figures 10 and 12,
R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
MAX490EC/E, MAX491EC/E
Figures 11 and 13, C
L
= 15pF, S2 closed
Figures 11 and 13, C
L
= 15pF, S1 closed
Figures 11 and 13, C
L
= 100pF, S1 closed
Figures 11 and 13, C
L
= 100pF, S2 closed
PARAMETER SYMBOL MIN TYP MAX UNITS
Driver Enable to Output High t
ZH
45 70
Receiver Input to Output t
PLH
, t
PHL
Driver Output Skew to Output
ns
Driver Enable to Output Low t
ZL
45 70 ns
Driver Disable Time from Low t
LZ
45 70
ns
| t
PLH
- t
PHL
| Differential
Receiver Skew
Driver Disable Time from High
t
SKD
t
HZ
45 70
5 ns
20 60 200
Receiver Enable to Output Low t
ZL
20 50
nsReceiver Enable to Output High
Driver Input to Output
t
ZH
20 50
nsReceiver Disable Time from Low t
LZ
20 50
t
PLH
10 40 60
nsReceiver Disable Time from High t
HZ
20 50
MbpsMaximum Data Rate f
MAX
2.5
ns
Time to Shutdown t
SHDN
50 200 600
t
SKEW
510
ns
CONDITIONS
Figures 10 and 14,
R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
Figures 10 and 14, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
Figures 9 and 15, C
RL
= 15pF, S1 closed
Figures 9 and 15, C
RL
= 15pF, S2 closed
Figures 9 and 15, C
RL
= 15pF, S1 closed
Figures 9 and 15, C
RL
= 15pF, S2 closed
MAX481E (Note 5)
Figures 10 and 12, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
MAX481E, MAX485E, MAX1487E
ns
Figures 10 and 12, R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF
t
PHL
10 40 60
ns
ns
ns
20 60 150
ns
kV±15A, B, Y and Z pins, tested using Human Body ModelESD Protection
MAX481E/MAX483E/MAX485E/
MAX487E–MAX491E/MAX1487E
Maxim Integrated
3