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ADM3488ARZ-REEL7 数据手册 - ADI（亚德诺）
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ADI（亚德诺）
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接口芯片
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SOIC-8
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RS-422/RS-485 接口 IC 3.3V Low Pwr Full Duplex 250 kbps
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ADM3488ARZ-REEL7数据手册
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ADM3483/ADM3485/ADM3488/ADM3490/ADM3491 Data Sheet
Rev. E | Page 6 of 20
TIMING SPECIFICATIONS—ADM3483/ADM3485/ADM3488/ADM3490/ADM3491
V
CC
= 3.3 V, T
A
= 25°C, unless otherwise noted.
Table 5.
Parameter Min Typ Max Unit Test Conditions/Comments
RECEIVER
Time to Shutdown (t
SHDN
)
ADM3483/ADM3485/ADM3491
1
80 190 300 ns
Propagation Delay, Low-to-High Level (t
RPLH
)
ADM3485/ADM3490/ADM3491 25 65 90 ns V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 24 and Figure 30)
ADM3483/ADM3488 25 75 120 ns
Propagation Delay, High-to-Low Level (t
RPHL
)
ADM3485/ADM3490/ADM3491 25 65 90 ns V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 24 and Figure 30)
ADM3483/ADM3488 25 75 120 ns
|t
PLH
– t
PHL
| Propagation Delay Skew (t
RPDS
)
ADM3485/ADM3490/ADM3491 10 ns V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 24 and Figure 30)
ADM3483/ADM3488 20 ns
RECEIVER OUTPUT ENABLE/DISABLE TIMES
(ADM3483/ADM3485/ADM3491 ONLY)
Output Enable Time to Low Level (t
PRZL
) 25 50 ns C
L
= 15 pF (see Figure 25 and Figure 31)
Output Enable Time to High Level (t
PRZH
) 25 50 ns C
L
= 15 pF (see Figure 25 and Figure 31)
Output Disable Time from High Level (t
PRHZ
) 25 45 ns C
L
= 15 pF (see Figure 25 and Figure 31)
Output Disable Time from Low Level (t
PRLZ
) 25 45 ns C
L
= 15 pF (see Figure 25 and Figure 31)
Output Enable Time from Shutdown to
Low Level (t
PRSL
)
720 1400 ns C
L
= 15 pF (see Figure 25 and Figure 31)
Output Enable Time from Shutdown to
High Level (t
PRSH
)
720 1400 ns C
L
= 15 pF (see Figure 25 and Figure 31)
1
The transceivers are put into shutdown by bringing the
RE
high and DE low. If the inputs are in this state for less than 80 ns, the parts are guaranteed not to enter
shutdown. If the parts are in this state for 300 ns or more, the parts are guaranteed to enter shutdown.
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