3.3V-Powered, 10Mbps and Slew-Rate-Limited
True RS-485/RS-422 Transceivers
MAX3483/MAX3485/MAX3486/MAX3488/MAX3490/MAX3491
DRIVER SWITCHING CHARACTERISTICS—MAX3483 and MAX3488
(V
CC
= 3.3V, T
A
= +25°C)
PARAMETER
Driver Differential Output Delay
Driver Differential Output Transition Time
Driver Propagation Delay, Low-to-High Level
Driver Propagation Delay, High-to-Low Level
SYMBOL
t
DD
t
TD
t
PLH
t
PHL
t
PDS
t
PZL
t
PZH
t
PHZ
t
PLZ
t
PSL
t
PSH
CONDITIONS
R
L
= 60Ω, Figure 7
R
L
= 60Ω, Figure 7
R
L
= 27Ω, Figure 8
R
L
= 27Ω, Figure 8
R
L
= 27Ω, Figure 8
R
L
= 110Ω, Figure 10
R
L
= 110Ω, Figure 9
R
L
= 110Ω, Figure 9
R
L
= 110Ω, Figure 10
R
L
= 110Ω, Figure 10
R
L
= 110Ω, Figure 9
MIN
600
400
700
700
TYP
900
700
1000
1000
100
900
600
50
50
1.9
2.2
1300
800
80
80
2.7
3.0
MAX
1400
1200
1500
1500
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
µs
|
t
PLH
- t
PHL
|
Driver Propagation Delay Skew (Note 2)
Driver Output Enable Time to Low Level
Driver Output Enable Time to High Level
Driver Output Disable Time from High Level
Driver Output Disable Time from Low Level
Driver Output Enable Time from Shutdown to Low Level
Driver Output Enable Time from Shutdown to High Level
DRIVER OUTPUT ENABLE/DISABLE TIMES (MAX3483 only)
RECEIVER SWITCHING CHARACTERISTICS
(V
CC
= 3.3V, T
A
= +25°C)
PARAMETER
Time to Shutdown
Receiver Propagation Delay,
Low-to-High Level
Receiver Propagation Delay,
High-to-Low Level
SYMBOL
t
SHDN
t
RPLH
t
RPHL
t
RPDS
t
PRZL
t
PRZH
t
PRHZ
t
PRLZ
t
PRSL
t
PRSH
CONDITIONS
MAX3483/MAX3485/MAX3486/MAX3491 only
(Note 3)
V
ID
= 0V to 3.0V, C
L
= 15pF, Figure 11
MAX3483/MAX3488
V
ID
= 0V to 3.0V, C
L
= 15pF, Figure 11
MAX3483/MAX3488
V
ID
= 0V to 3.0V, C
L
= 15pF, Figure 11
MAX3483/MAX3488
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
25
25
25
25
720
720
MIN
80
25
25
25
25
TYP
190
65
75
65
75
MAX
300
90
120
90
120
10
20
50
50
45
45
1400
1400
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
|
t
PLH
- t
PHL
|
Receiver
Propagation Delay Skew
Receiver Output Enable Time
to Low Level
Receiver Output Enable Time
to High Level
Receiver Output Disable
Time from High Level
Receiver Output Disable
Time from Low Level
Receiver Output Enable Time
from Shutdown to Low Level
Receiver Output Enable Time
from Shutdown to High Level
Note 1:
∆V
OD
and
∆V
OC
are the changes in V
OD
and V
OC
, respectively, when the DI input changes state.
Note 2:
Measured on
|
t
PLH
(Y) - t
PHL
(Y)
|
and
|
t
PLH
(Z) - t
PHL
(Z)
|.
Note 3:
The transceivers are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 80ns, the
parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 300ns, the parts are guaranteed to
have entered shutdown. See
Low-Power Shutdown Mode
section.
4
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
