Datasheet

MAX13442E/MAX13443E/MAX13444E
±15kV ESD-Protected, ±80V Fault-Protected,
Fail-Safe RS-485/J1708 Transceivers
4 _______________________________________________________________________________________
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Figure 3, R
L
= 54Ω, C
L
= 50pF (MAX13442E)
Driver Propagation Delay
t
PLHA,
t
PLHB R
DIFF
= 60Ω, C
DIFF
= 100pF (MAX13444E)
2000 ns
Driver Differential Propagation Delay
t
DPLH,
t
DPHL
R
L
= 54Ω, C
L
= 50pF, Figure 4 2000 ns
Driver Differential Output
Transition Time
t
LH
,t
HL
R
L
= 54Ω, C
L
= 50pF, Figure 4 200 2000 ns
Driver Output Skew
t
S KEWAB
,
t
S KEWBA
R
L
= 54Ω, C
L
= 50pF,
t
SKEWAB
= |t
PLHA
- t
PHLB
|,
t
SKEWBA
= |t
PLHB
- t
PHLA
|
350 ns
Differential Driver Output Skew t
DSKEW
R
L
= 54Ω, C
L
= 50pF,
t
DSKEW
= |t
DPLH
- t
DPHL
|
200 ns
Maximum Data Rate f
MAX
250 kbps
Driver Enable Time to Output High t
PDZH
R
L
= 500Ω, C
L
= 50pF, Figure 5 2000 ns
Driver Disable Time from Output High t
PDHZ
R
L
= 500Ω, C
L
= 50pF, Figure 5 2000 ns
Driver Enable Time from Shutdown to
Output High
t
PDHS
R
L
= 500Ω, C
L
= 50pF, Figure 5 4.2 µs
Driver Enable Time to Output Low t
PDZL
R
L
= 500Ω, C
L
= 50pF, Figure 6 2000 ns
Driver Disable Time from Output Low t
PDLZ
R
L
= 500Ω, C
L
= 50pF, Figure 6 2000 ns
Driver Enable Time from Shutdown to
Output Low
t
PDLS
R
L
= 500Ω, C
L
= 50pF, Figure 6 4.2 µs
Driver Time to Shutdown t
SHDN
R
L
= 500Ω, C
L
= 50p F 800 ns
Receiver Propagation Delay
t
RPLH
,
t
RPHL
C
L
= 20pF, V
ID
= 2V, V
CM
= 0V, Figure 7 2000 ns
Receiver Output Skew t
RSKEW
C
L
= 20pF, t
RSKEW
= |t
RPLH
- t
RPHL
| 200 ns
Receiver Enable Time to Output High t
RPZH
R
L
= 1kΩ, C
L
= 20pF, Figure 8 2000 ns
Recei ver D i sab l e Ti m e fr om Outp ut H i g ht
RPHZ
R
L
= 1kΩ, C
L
= 20pF, Figure 8 2000 ns
Receiver Wake Time from Shutdown t
RPWAKE
R
L
= 1kΩ, C
L
= 20pF, Figure 8 4.2 µs
Receiver Enable Time to Output Low t
RPZL
R
L
= 1kΩ, C
L
= 20pF, Figure 8 2000 ns
Recei ver D i sab l e Ti m e fr om Outp ut Low t
RPLZ
R
L
= 1kΩ, C
L
= 20pF, Figure 8 2000 ns
Receiver Time to Shutdown t
SHDN
R
L
= 500Ω, C
L
= 50pF 800 ns
SWITCHING CHARACTERISTICS (MAX13442E/MAX13444E)
(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.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX13442E/
MAX13444E
±80
Overvoltage Protection
A, B; R
SOURCE
= 0,
R
L
= 54
MAX13443E ±60
V
ESD Protection A, B Human Body Model ±15 kV
PROTECTION SPECIFICATIONS
(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.)