Datasheet

±15kV ESD-Protected, Slew-Rate-Limited,
Low-Power, RS-485/RS-422 Transceivers
SWITCHING CHARACTERISTICS—MAX483E, MAX487E/MAX488E/MAX489E
(V
CC
= 5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Notes 1, 2)
SWITCHING CHARACTERISTICS—MAX481E/MAX485E, MAX490E/MAX491E, MAX1487E
(continued)
(V
CC
= 5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Notes 1, 2)
225 1000
Figures 11 and 13, C
L
= 100pF, S2 closed
Figures 11 and 13, C
L
= 100pF, S1 closed
Figures 9 and 15, C
L
= 15pF, S2 closed,
A - B = 2V
CONDITIONS
ns45 100t
ZH(SHDN)
Driver Enable from Shutdown to
Output High (MAX481E)
ns
Figures 9 and 15, C
L
= 15pF, S1 closed,
B - A = 2V
t
ZL(SHDN)
Receiver Enable from Shutdown
to Output Low (MAX481E)
ns45 100t
ZL(SHDN)
Driver Enable from Shutdown to
Output Low (MAX481E)
ns225 1000t
ZH(SHDN)
Receiver Enable from Shutdown
to Output High (MAX481E)
UNITSMIN TYP MAXSYMBOLPARAMETER
t
PLH
t
SKEW
Figures 10 and 12, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
t
PHL
Figures 10 and 12, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
Driver Input to Output
Driver Output Skew to Output ns20 800
ns
ns2000
MAX483E/MAX487E, Figures 11 and 13,
C
L
= 100pF, S2 closed
t
ZH(SHDN)
Driver Enable from Shutdown to
Output High
250 2000
ns2500
MAX483E/MAX487E, Figures 9 and 15,
C
L
= 15pF, S1 closed
t
ZL(SHDN)
Receiver Enable from Shutdown
to Output Low
ns2500
MAX483E/MAX487E, Figures 9 and 15,
C
L
= 15pF, S2 closed
t
ZH(SHDN)
Receiver Enable from Shutdown
to Output High
ns2000
MAX483E/MAX487E, Figures 11 and 13,
C
L
= 100pF, S1 closed
t
ZL(SHDN)
Driver Enable from Shutdown to
Output Low
ns50 200 600MAX483E/MAX487E (Note 5) t
SHDN
Time to Shutdown
t
PHL
t
PLH
, t
PHL
< 50% of data period
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
Figures 9 and 15, C
RL
= 15pF, S1 closed
Figures 11 and 13, C
L
= 15pF, S2 closed
Figures 10 and 14, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
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
CONDITIONS
kbps250f
MAX
250 800 2000
Maximum Data Rate
ns25 50t
HZ
Receiver Disable Time from High
ns
250 800 2000
25 50t
LZ
Receiver Disable Time from Low
ns25 50t
ZH
Receiver Enable to Output High
ns25 50t
ZL
Receiver Enable to Output Low
ns
ns
100
300 3000t
HZ
t
SKD
Driver Disable Time from High
I t
PLH
- t
PHL
I Differential
Receiver Skew
Figures 10 and 14, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
ns300 3000t
LZ
Driver Disable Time from Low
ns250 2000t
ZL
Driver Enable to Output Low
ns
Figures 10 and 12, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
ns250 2000t
R
, t
F
250 2000
Driver Rise or Fall Time
ns
t
PLH
Receiver Input to Output
250 2000t
ZH
Driver Enable to Output High
UNITSMIN TYP MAXSYMBOLPARAMETER
MAX481E/MAX483E/MAX485E/
MAX487E–MAX491E/MAX1487E
4
Maxim Integrated