Datasheet

MAX3440E–MAX3444E
±15kV ESD-Protected, ±60V Fault-Protected,
10Mbps, Fail-Safe RS-485/J1708 Transceivers
_______________________________________________________________________________________ 5
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Driver Propagation Delay
t
PLHA,
t
PLHB
Figure 3, R
L
= 27, C
L
= 50pF 60 ns
Driver Differential Propagation Delay
t
DPLH,
t
DPHL
Figure 4, R
L
= 54, C
L
= 50pF 60 ns
Driver Differential Output
Transition Time
t
LH
,t
HL
Figure 4, R
L
= 54, C
L
= 50pF 25 ns
Driver Output Skew
t
SKEWAB
,
t
SKEWBA
R
L
= 54, C
L
= 50pF,
t
SKEWAB
= |t
PLHA
- t
PHLB
|,
t
SKEWBA
= |t
PLHB
- t
PHLA
|
10 ns
Differential Driver Output Skew t
DSKEW
R
L
= 54, C
L
= 50pF,
t
DSKEW
= |t
DPLH
- t
DPHL
|
10 ns
Maximum Data Rate f
MAX
10 Mbps
Driver Enable Time to Output High t
PDZH
Figure 5, R
L
= 500, C
L
= 50pF 1200 ns
Driver Disable Time from Output High t
PDHZ
Figure 5, R
L
= 500, C
L
= 50pF 1200 ns
Driver Enable Time from Shutdown to
Output High
t
PDHS
Figure 5, R
L
= 500, C
L
= 50pF (MAX3443E) 4.2 μs
Driver Enable Time to Output Low t
PDZL
Figure 6, R
L
= 500, C
L
= 50pF 1200 ns
Driver Disable Time from Output Low t
PDLZ
Figure 6, R
L
= 500, C
L
= 50pF 1200 ns
Driver Enable Time from Shutdown to
Output Low
t
PDLS
Figure 6, R
L
= 500, C
L
= 50pF (MAX3443E) 4.2 μs
Driver Time to Shutdown t
SHDN
Figure 6, R
L
= 500, C
L
= 50pF (MAX3443E) 800 ns
Receiver Propagation Delay
t
RPLH
,
t
RPHL
Figure 7, C
L
= 20pF, V
ID
= 2V, V
CM
= 0V 85 ns
Receiver Output Skew t
RSKEW
C
L
= 20pF, t
RSKEW
= |t
RPLH
- t
RPHL
| 15 ns
Receiver Enable Time to Output High t
RPZH
Figure 8, R
L
= 1k, C
L
= 20pF 400 ns
Receiver Disable Time from Output
High
t
RPHZ
Figure 8, R
L
= 1k, C
L
= 20pF 400 ns
Receiver Wake Time from Shutdown t
RPWAKE
Figure 8, R
L
= 1k, C
L
= 20pF (MAX3443E) 4.2 μs
Receiver Enable Wake Time from
Shutdown
t
RPSH
Figure 8, R
L
= 1k, C
L
= 20pF 400 ns
Receiver Disable Time from Output Low t
RPLZ
Figure 8, R
L
= 1k, C
L
= 20pF 400 ns
Receiver Time to Shutdown t
SHDN
R
L
= 500, C
L
= 50pF (MAX3443E) 800 ns
SWITCHING CHARACTERISTICS (MAX3441E/MAX3443E)
(V
CC
= +4.75V to +5.25V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +5V and T
A
= +25°C.)
Note 2: ΔV
OD
and ΔV
OC
are the changes in V
OD
and V
OC
, respectively, when the DI input changes state.
Note 3: The short-circuit output current applies to peak current just before foldback current limiting; the short-circuit foldback output
current applies during current limiting to allow a recovery from bus contention.