Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MAX488/MAX489,
DE, DI,
RE
= 0V or V
CC
MAX490/MAX491,
DE, DI,
RE
= 0V or V
CC
No-Load Supply Current
(Note 3)
I
CC
MAX481/MAX485,
RE
= 0V or V
CC
MAX1487,
RE
= 0V or V
CC
MAX483/MAX487,
RE
= 0V or V
CC
Supply Current in Shutdown
Driver Short-Circuit Current,
V
O
= High
Driver Short-Circuit Current,
V
O
= Low
Receiver Short-Circuit Current
I
SHDN
I
OSD1
I
OSD2
I
OSR
DE = V
CC
DE = 0V
DE = V
CC
DE = 0V
DE = 5V
MAX483
MAX487
MIN
TYP
120
300
500
300
300
230
350
250
120
0.1
35
35
7
MAX
250
500
900
500
500
400
650
400
250
10
250
250
95
µA
UNITS
MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487
DE = 0V
MAX481/483/487, DE = 0V,
RE
= V
CC
-7V
≤
V
O
≤12V
(Note 4)
-7V
≤
V
O
≤12V
(Note 4)
0V
≤
V
O
≤
V
CC
µA
mA
mA
mA
SWITCHING CHARACTERISTICS—MAX481/MAX485, MAX490/MAX491, MAX1487
(V
CC
= 5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Notes 1, 2)
PARAMETER
Driver Input to Output
Driver Output Skew to Output
Driver Rise or Fall Time
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High
Receiver Input to Output
SYMBOL
CONDITIONS
t
PLH
Figures 6 and 8, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
t
PHL
t
SKEW
Figures 6 and 8, R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF
MAX481, MAX485, MAX1487
Figures 6 and 8,
R
DIFF
= 54Ω,
t
R
, t
F
MAX490C/E, MAX491C/E
C
L1
= C
L2
= 100pF MAX490M, MAX491M
t
ZH
Figures 7 and 9, C
L
= 100pF, S2 closed
t
ZL
Figures 7 and 9, C
L
= 100pF, S1 closed
t
LZ
Figures 7 and 9, C
L
= 15pF, S1 closed
t
HZ
Figures 7 and 9, C
L
= 15pF, S2 closed
Figures 6 and 10, MAX481, MAX485, MAX1487
t
PLH
, t
PHL
R
DIFF
= 54Ω,
MAX490C/E, MAX491C/E
C
L1
= C
L2
= 100pF MAX490M, MAX491M
t
SKD
t
ZL
t
ZH
t
LZ
t
HZ
f
MAX
t
SHDN
MAX481 (Note 5)
Figures 6 and 10, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
Figures 5 and 11, C
RL
= 15pF, S1 closed
Figures 5 and 11, C
RL
= 15pF, S2 closed
Figures 5 and 11, C
RL
= 15pF, S1 closed
Figures 5 and 11, C
RL
= 15pF, S2 closed
2.5
50
MIN
10
10
3
5
3
TYP
30
30
5
15
15
15
40
40
40
40
90
90
90
13
20
20
20
20
200
50
50
50
50
600
MAX
60
60
10
40
25
40
70
70
70
70
200
150
200
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
20
20
20
|
t
PLH
- t
PHL
|
Differential
Receiver Skew
Receiver Enable to Output Low
Receiver Enable to Output High
Receiver Disable Time from Low
Receiver Disable Time from High
Maximum Data Rate
Time to Shutdown
ns
ns
ns
ns
ns
Mbps
ns
_______________________________________________________________________________________
3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
