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