Electrical characteristics (continued) – Rainbow Electronics MAX14770E User Manual
Page 5
High-ESD Profibus RS-485 Transceiver
MAX14770E
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +5V Q10%, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +5V, T
A
= +25NC.) (Note 2)
Note 2: Devices are production tested at T
A
= +25NC. Specifications over temperature limits are guaranteed by design.
Note 3: V
ODPP
is the difference in VOD, with the DI at high and DI at low.
Note 4: DV
OD
and DV
OC
are the changes in |V
OD
| and |V
OC
|, respectively, with the DI at high and DI at low.
Note 5: The short-circuit output current applies to peak current just prior to foldback current limiting; the short-circuit foldback out-
put current applies during current limiting to allow a recovery from bus contention.
Note 6: Shutdown is enabled by bringing RE high and DE low. If the enable inputs are in this state for less than 50ns, the device
is guaranteed not to enter shutdown. If the enable inputs are in this state for at least 800ns, the device is guaranteed to
have entered shutdown.
Note 7: Capacitive load includes test probe and fixture capacitance.
Note 8: Guaranteed by characterization, not production tested.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Maximum Data Rate
20
Mbps
Receiver Enable to
Output High
t
RZH
S2 closed; R
L
= 1kI, C
L
= 15pF; Figure 10
30
ns
Receiver Enable to
Output Low
t
RZL
S1 closed; R
L
= 1kI, C
L
= 15pF; Figure 10
30
ns
Receiver Disable
Time from Low
t
RLZ
S1 closed; R
L
= 1kI, C
L
= 15pF; Figure 10
30
ns
Receiver Disable
Time from High
t
RHZ
S2 closed; R
L
= 1kI, C
L
= 15pF; Figure 10
30
ns
Receiver Enable from
Shutdown to Output
High
t
RZL(SHDN)
S1 closed; R
L
= 1kI, C
L
= 15pF; Figure 10
(Notes 6, 7)
100
F
s
Receiver Enable from
Shutdown to Output
Low
t
RZH(SHDN)
S2 closed; R
L
= 1kI, C
L
= 15pF; Figure 10
(Notes 6, 7)
100
F
s
Time to Shutdown
t
SHDN
(Note 6)
50
800
ns