Complete, Isolated RS-485/RS-422
Data Interface
MAX1480A/B/C/MAX1490A/B
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 TA = +25°C.)
PARAMETER
|t
PLH
- t
PHL
| Differential Receiver
Skew
Maximum Data Rate
Time to Shutdown
Shutdown to Driver Output High
Shutdown to Driver Output Low
SYMBOL
t
SKD
f
MAX
t
SHDN
t
ZH(SHDN)
t
ZL(SHDN)
Figures 6 and 9, C
L
= 100pF, S2 closed
Figures 6 and 9, C
L
= 100pF, S1 closed
CONDITIONS
Figures 5 and 10, R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF
t
PLH
, t
PHL
< 50% of data period
2.5
100
3
3
10
10
MIN
TYP
20
MAX
UNITS
ns
Mbps
µs
µs
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 TA = +25°C.)
PARAMETER
Driver Input to Output
Propagation Delay
Driver Output Skew
Driver Rise or Fall Time
Driver Enable to Output High
(MAX1480B Only)
Driver Enable to Output Low
(MAX1480B Only)
Driver Disable Time from Low
(MAX1480B Only)
Driver Disable Time from High
(MAX1480B Only)
Driver Enable to Output High
(MAX1480C Only)
Driver Enable to Output Low
(MAX1480C Only)
SYMBOL
t
PLH
t
PHL
t
SKEW
t
R,
t
F
t
ZH
t
ZL
t
LZ
t
HZ
t
ZH
t
ZL
CONDITIONS
Figures 5 and 7, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
Figures 5 and 7, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
Figures 5 and 7, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
Figures 6 and 8, C
L
= 100pF, S2 closed
Figures 6 and 8, C
L
= 100pF, S1 closed
Figures 6 and 8, C
L
= 15pF, S1 closed
Figures 6 and 8, C
L
= 15pF, S2 closed
Figures 6 and 8, C
L
= 100pF, S2 closed
Figures 6 and 8, C
L
= 100pF, S1 closed
MIN
TYP
2
2
900
1.0
35
35
13
13
0.5
0.5
MAX
3.0
3.0
1600
2.0
100
100
50
50
4.5
4.5
UNITS
µs
ns
µs
µs
µs
µs
µs
µs
µs
4
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
