3.3V-Powered, 10Mbps and Slew-Rate-Limited
True RS-485/RS-422 Transceivers
DRIVER SWITCHING CHARACTERISTICS—MAX3483 and MAX3488
(V
CC
= 3.3V, T
A
= +25°C)
ns50 80t
PLZ
Driver Output Disable Time from Low Level R
L
= 110Ω, Figure 10
ns700 1000 1500t
PLH
Driver Propagation Delay, Low-to-High Level
ns400 700 1200t
TD
ns600 900 1400t
DD
Driver Differential Output Delay
Driver Differential Output Transition Time
µs2.2 3.0t
PSH
Driver Output Enable Time from Shutdown to High Level
µs1.9 2.7t
PSL
Driver Output Enable Time from Shutdown to Low Level
ns50 80t
PHZ
Driver Output Disable Time from High Level
ns700 1000 1500t
PHL
Driver Propagation Delay, High-to-Low Level
ns100t
PDS
|
t
PLH
- t
PHL|
Driver Propagation Delay Skew (Note 2)
ns900 1300t
PZL
Driver Output Enable Time to Low Level
ns600 800t
PZH
Driver Output Enable Time to High Level
UNITSMIN TYP MAXSYMBOLPARAMETER
R
L
= 27Ω, Figure 8
R
L
= 60Ω, Figure 7
R
L
= 60Ω, Figure 7
R
L
= 110Ω, Figure 9
R
L
= 110Ω, Figure 10
R
L
= 110Ω, Figure 9
R
L
= 27Ω, Figure 8
R
L
= 27Ω, Figure 8
R
L
= 110Ω, Figure 10
R
L
= 110Ω, Figure 9
CONDITIONS
RECEIVER SWITCHING CHARACTERISTICS
(V
CC
= 3.3V, T
A
= +25°C)
ns25 45t
PRLZ
Receiver Output Disable
Time from Low Level
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
ns
25 65 90
ns80 190 300t
SHDN
Time to Shutdown
ns720 1400t
PRSH
Receiver Output Enable Time
from Shutdown to High Level
ns720 1400t
PRSL
Receiver Output Enable Time
from Shutdown to Low Level
ns25 45t
PRHZ
Receiver Output Disable
Time from High Level
ns
25 65 90
ns
10
ns25 50t
PRZL
Receiver Output Enable Time
to Low Level
ns25 50t
PRZH
Receiver Output Enable Time
to High Level
UNITSMIN TYP MAXSYMBOLPARAMETER
V
ID
= 0V to 3.0V, C
L
= 15pF, Figure 11
MAX3483/MAX3485/MAX3486/MAX3491 only
(Note 3)
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
V
ID
= 0V to 3.0V, C
L
= 15pF, Figure 11
V
ID
= 0V to 3.0V, C
L
= 15pF, Figure 11
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
CONDITIONS
25 75 120
t
RPLH
Receiver Propagation Delay,
Low-to-High Level
MAX3483/MAX3488
25 75 120
t
RPHL
Receiver Propagation Delay,
High-to-Low Level
MAX3483/MAX3488
20
t
RPDS
|
t
PLH
- t
PHL|
Receiver
Propagation Delay Skew
MAX3483/MAX3488
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.
DRIVER OUTPUT ENABLE/DISABLE TIMES (MAX3483 only)
MAX3483/MAX3485/MAX3486/
MAX3488/MAX3490/MAX3491
