Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487
SWITCHING CHARACTERISTICS—MAX481/MAX485, MAX490/MAX491, MAX1487 (continued)
(V
CC
= 5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
Figures 7 and 9, C
L
= 100pF, S2 closed
Figures 7 and 9, C
L
= 100pF, S1 closed
Figures 5 and 11, C
L
= 15pF, S2 closed,
A - B = 2V
Figures 5 and 11, C
L
= 15pF, S1 closed,
B - A = 2V
MIN
TYP
40
40
300
300
MAX
100
100
1000
1000
UNITS
ns
ns
ns
ns
Driver Enable from Shutdown to
t
ZH(SHDN)
Output High (MAX481)
Driver Enable from Shutdown to
t
ZL(SHDN)
Output Low (MAX481)
Receiver Enable from Shutdown
t
ZH(SHDN)
to Output High (MAX481)
Receiver Enable from Shutdown
t
ZL(SHDN)
to Output Low (MAX481)
SWITCHING CHARACTERISTICS—MAX483, MAX487/MAX488/MAX489
(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
t
PLH
t
PHL
t
SKEW
t
R
, t
F
t
ZH
t
ZL
t
LZ
t
HZ
t
PLH
t
PHL
t
SKD
t
ZL
t
ZH
t
LZ
t
HZ
f
MAX
t
SHDN
t
ZH(SHDN)
t
ZL(SHDN)
t
ZH(SHDN)
t
ZL(SHDN)
CONDITIONS
Figures 6 and 8, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
Figures 6 and 8, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
Figures 6 and 8, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
Figures 7 and 9, C
L
= 100pF, S2 closed
Figures 7 and 9, C
L
= 100pF, S1 closed
Figures 7 and 9, C
L
= 15pF, S1 closed
Figures 7 and 9, C
L
= 15pF, S2 closed
Figures 6 and 10, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
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
t
PLH
, t
PHL
< 50% of data period
MAX483/MAX487 (Note 5)
MAX483/MAX487, Figures 7 and 9,
C
L
= 100pF, S2 closed
MAX483/MAX487, Figures 7 and 9,
C
L
= 100pF, S1 closed
MAX483/MAX487, Figures 5 and 11,
C
L
= 15pF, S2 closed
MAX483/MAX487, Figures 5 and 11,
C
L
= 15pF, S1 closed
250
50
200
600
2000
2000
2500
2500
250
250
250
300
300
250
250
100
20
20
20
20
50
50
50
50
MIN
250
250
TYP
800
800
100
MAX
2000
2000
800
2000
2000
2000
3000
3000
2000
2000
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
kbps
ns
ns
ns
ns
ns
I
t
PLH
- t
PHL
I
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
Driver Enable from Shutdown to
Output High
Driver Enable from Shutdown to
Output Low
Receiver Enable from Shutdown
to Output High
Receiver Enable from Shutdown
to Output Low
4
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
