Datasheet

(V
CC
= 3.3V, T
A
= +25°C)
(V
CC
= 3.3V, T
A
= +25°C)
Note 1: ΔV
OD
and ΔV
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.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Driver Di󰀨erential Output Delay t
DD
R
L
= 60Ω, Figure 7 600 900 1400 ns
Driver Di󰀨erential Output Transition Time t
TD
R
L
= 60Ω, Figure 7 400 700 1200 ns
Driver Propagation Delay, Low-to-High Level t
PLH
R
L
= 27Ω, Figure 8 700 1000 1500 ns
Driver Propagation Delay, High-to-Low Level t
PHL
R
L
= 27Ω, Figure 8 700 1000 1500 ns
|t
PLH
- t
PHL
| Driver Propagation Delay Skew (Note 2) t
PDS
R
L
= 27Ω, Figure 8 100 ns
DRIVER OUTPUT ENABLE/DISABLE TIMES (MAX3485/MAX3491 only)
Driver Output Enable Time to Low Level t
PZL
R
L
= 110Ω, Figure 10 900 1300 ns
Driver Output Enable Time to High Level t
PZH
R
L
= 110Ω, Figure 9 600 800 ns
Driver Output Disable Time from High Level t
PHZ
R
L
= 110Ω, Figure 9 50 80 ns
Driver Output Disable Time from Low Level t
PLZ
R
L
= 110Ω, Figure 10 50 80 ns
Driver Output Enable Time from Shutdown to Low Level t
PSL
R
L
= 110Ω, Figure 10 1.9 2.7 ns
Driver Output Enable Time from Shutdown to High Level t
PSH
R
L
= 110Ω, Figure 9 2.2 3.0 ns
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Time to Shutdown t
SHDN
MAX3483/MAX3485/MAX3486/MAX3491 only
(Note 3)
80 190 300 ns
Receiver Propagation Delay,
Low-to-High Level
t
RPLH
V
ID
= 0V to 3.0V, C
L
= 15pF, Figure 11 25 65 90
ns
MAX3483/MAX3488 25 75 120
Receiver Propagation Delay,
High-to-Low Level
t
RPHL
V
ID
= 0V to 3.0V, C
L
= 15pF, Figure 11 25 65 90
ns
MAX3483/MAX3488 25 75 120
|t
PLH
- t
PHL
| Receiver
Propagation Delay Skew
t
RPDS
V
ID
= 0V to 3.0V, C
L
= 15pF, Figure 11 10
ns
MAX3483/MAX3488 20
Receiver Output Enable Time
to Low Level
t
PRZL
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
25 50 ns
Receiver Output Enable Time
to High Level
t
PRZH
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
25 50 ns
Receiver Output Disable
Time from High Level
t
PRHZ
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
25 45 ns
Receiver Output Disable
Time from Low Level
t
PRLZ
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
25 45 ns
Receiver Output Enable Time
from Shutdown to Low Level
t
PRSL
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
720 1400 ns
Receiver Output Enable Time
from Shutdown to High Level
t
PRSH
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
720 1400 ns
MAX3483/MAX3485/
MAX3486/MAX3488/
MAX3490/MAX3491
3.3V-Powered, 10Mbps and Slew-Rate-Limited
True RS-485/RS-422 Transceivers
www.maximintegrated.com
Maxim Integrated │ 5
Driver Switching Characteristics—MAX3483 and MAX3488
Receiver Switching Characteristics