Datasheet

MAX1480A/B/C/MAX1490A/B
Complete, Isolated RS-485/RS-422
Data Interface
4 _______________________________________________________________________________________
SWITCHING CHARACTERISTICS—MAX1480A/MAX1490A (continued)
(V
CC_
= 5V ±10%, FS = V
CC_
, 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
|t
PLH
- t
PHL
| Differential Receiver
Skew
t
SKD
Figures 5 and 10, R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF
20 ns
Maximum Data Rate f
MAX
t
PLH
, t
PHL
< 50% of data period 2.5 Mbps
Time to Shutdown t
SHDN
100 µs
Shutdown to Driver Output High t
ZH
(
SHDN
)
Figures 6 and 9, C
L
= 100pF, S2 closed 3 10 µs
Shutdown to Driver Output Low t
ZL
(
SHDN
)
Figures 6 and 9, C
L
= 100pF, S1 closed 3 10 µs
SWITCHING CHARACTERISTICS—MAX1480B/MAX1480C/MAX1490B
(V
CC_
= 5V ±10%, FS = V
CC_
, 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
t
PLH
2 3.0
Driver Input to Output
Propagation Delay
t
PHL
Figures 5 and 7, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
2 3.0
µs
Driver Output Skew t
SKEW
Figures 5 and 7, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
900 1600 ns
Driver Rise or Fall Time t
R,
t
F
Figures 5 and 7, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
1.0 2.0 µs
Driver Enable to Output High
(MAX1480B Only)
t
ZH
Figures 6 and 8, C
L
= 100pF, S2 closed 35 100 µs
Driver Enable to Output Low
(MAX1480B Only)
t
ZL
Figures 6 and 8, C
L
= 100pF, S1 closed 35 100 µs
Driver Disable Time from Low
(MAX1480B Only)
t
LZ
Figures 6 and 8, C
L
= 15pF, S1 closed 13 50 µs
Driver Disable Time from High
(MAX1480B Only)
t
HZ
Figures 6 and 8, C
L
= 15pF, S2 closed 13 50 µs
Driver Enable to Output High
(MAX1480C Only)
t
ZH
Figures 6 and 8, C
L
= 100pF, S2 closed 0.5 4.5 µs
Driver Enable to Output Low
(MAX1480C Only)
t
ZL
Figures 6 and 8, C
L
= 100pF, S1 closed 0.5 4.5 µs